DESCRIPTION
STEEL WALL
Technical Field
[OOOl]
Thepresentinventionrelatestoa s t e e l w a l l u s e d i n e a r t h
retainingworks, cofferdam, bankprotection, landreclamation,
embankment, and the l i k e .
Background A r t
[0002]
Conventionally, a s t e e l sheet p i l e anda s t e e l pipe sheet
p i l e havebeenusedin various construction works such as earth
retainingworks, cofferdam, bankprotection, land reclamation,
and embankment. The s t e e l sheet p i l e and t h e s t e e l pipe sheet
p i l e are used d i f f e r e n t l y according t o required rigidity. In
general, the s t e P sheet p i l e is used i n a s i t u a t i o n wllere the
r i g i d l t y may be low, and the s t e e l pipe sheet p i l e i s used In
a s i t u a t i o n where the high r i g i d i t y is required.
[0003]
Here, the s t e e l pipe sheet p i l e has a l a r g e r amount of
j o i n t margin than the s t e e l sheet p i l e . Therefore, in a case
where water stopping performance is requiredwhen constructing
the cofferdam, the bank protection, and the l i k e , in general,
a method i n which a j o i n t space is f i l l e d with packed cement
mortar is used. In t h i s method, i n a case where a bag in which
the mortar is packed is broken when used i n a waterfront
environment such as a r i v e r a n d a h a r b o r , t h e r e is a p o s s i b i l ~ t y
t h a t the mortar may flow out. Since a space between the bags
may become a water channel, it is not n e c e s s a r i l y s u i t a b l e f o r
a use where the s t r i c t water stopping performance is required.
[0004]
Therefore, the following has been proposed as a measure
in a case where leakage prevention of water i n s i d e a disposal
site is s t r i c t l y required such as i n a case of water shielding
bank protection of a sea surface waste disposal site and t h e
l i k e . That is, there has been proposed a s t r u c t u r e i n which
theleakagepreventionmeasureisimplementedtothejoin-tspace
of the s t e e l pipe sheet p i l e , and t h e j o i n t space is d i r e c t l y
f i l l e d with a f i l l e r such as the mortar (see Patent L i t e r a t u r e
1, f o r example). In a case where the mortar is f i l l e d i n t h i s
way, there is a riced t o perform work of driving the sCeel pipe
sheet p i l e i n t o the ground, removing earth and sand inside the
j o i n t by a water j e t and the l i k e , and f i l l i n g the j o i n t with
thepackedmortarandmortar. Therefore, it is disadvantageous
i n t h a t e f f o r t and time are required for work a t a s t e e l pipe
sheet p i l e s i t e .
[0005]
I n c o n t r a s t , t h e s - t e e l s h e e t p i l e h a s l o w r i g i d i t y c o m p a r e d
t o t h a t of the s t e e l pipe sheet p i l e but an excellent water stopping
performance and a small expansion space of t h e j o i n t . Even i n
a s t a t e where no measure is implemented, the water stopping
i performance thereof is high compared to t h a t of the s t e e l pipe
sheet p i l e . By c o a t i n g t h e j o i n t w i t h a swellingwaterstopping
material inadvance, it is p o s s i b l e t o f u r t h e r enhance thewater
stopping performance of the s t e e l sheet p i l e . By t h i s method,
it is possible t o provide the water stopping performance equal
t o or g r e a t e r than the s t e e l pipe sheet p i l e , t o which the
above-describedmeasurehasbeenimplemented, a s w e l l as t o save
the e f f o r t i n the work a t the s i t e .
[0006]
As atechniqueofenhancingtherigidityofthesteelsheet
p i l e , a t i e rod type s t e e l sheet p i l e wall such as a t i e rod
type s t e e l sheet p i l e bank protection which couples a s t e e l sheet
p i l e wall t o be a bank protection and a shoring provided on a
land side than the bank protection by a t i e rod.
In the t i c rod type s t e e l sheet p i l e wall, a large
construction space is necessary f o r coupling the s t e e l sheet
p i l e wall t o the shoring by a long t i e rod.
Similarly, i n t h e t i e rodtype s t e e l s h e e t p i l e w a l l , since
the s t e e l sheet p i l e wall i s coupled t o the shoring through the
long t i e rod, the t i e rod is capable of transmitting a t e n s i l e
force but not a compression force.
[0007]
Furthermore, as a technique of enhancing the r i g i d i t y of
the s t e e l sheet p i l e , there has been proposed a technique of
using a combination s t e e l sheet p i l e i n which a U-shaped
(hat-shaped) s t e e l sheet p i l e c o n s t i t u t i n g a wall body is
i n t e g r a l l y s t i f f e n e d with an H-shaped s t e e l (see Patent
L i t e r a t u r e 2, for example). The combination s t e e l sheet p i l e
h a v i n g t h i s s t r u c t u r e h a s a l a r g e s e c t i o n a l area, a n d r e s i s t a n c e
a t the time of driving becomes large, whereby a construction
methodthereof i s l i m i t e d . I n p a r t i c u l a r , constructionbecomes
d i f f i c u l t i n a hard ground.
[0008]
Therefore, application of a construction method using an
earth auger ( d r i l l i n g device) f o r d r i l l i n g the ground may be
considered for constructing in the hard ground. However, a
s e c t i o n a l s h a p e o f t h e combinationsteel s h e e t p i l e e x t e n d s over
a wide range, whereby it is necessary t o use ingenui-ty. As an
example of the ingenuity, there has been proposed t o use a
constructionmetiiodasbelowina casewherea combination s t e e l
s h e e t p i l e h a v i n g a s t r u c t u r e similar t o t h a t o f t h e combination
s t e e l sheet p i l e of Patent L i t e r a t u r e 2 is b u i l t up (see Patent
L i t e r a t u r e 3, for example). That is, there has been proposed
a constructionmethod in which the combination s t e e l sheet p i l e
is driven so as t o extend over a range d r i l l e d by an earth auger
a t the time of driving the combination s t e e l sheet p i l e and a
range d r i l l e d by an earth auger a t the time of driving the
combination s t e e l sheet p i l e t h a t has been driven before t h i s
combination s t e e l sheet p i l e .
I Citation L i s t
Patent L i t e r a t u r e
[0009]
Patent L i t e r a t u r e 1: J P 3756755 B1
Patent L i t e r a t u r e 2: J P 2002-212943 A
Patent L i t e r a t u r e 3: J P 4074241 B1
Summary of Invention
Technical Problem
[0010]
As described above, r i g i d i t y as a s t e e l wall is higher
i n a s t e e l pipe s h e e t p i l e wall than i n a s t e e l sheet p i l e wall.
On the other hand, water stopping performance i n a j o i n t can
be enhanced more e a s i l y i n the s t e e l sheet p i l e wall than the
s t e e l pipe sheet p i l e wall.
Therefore, as described i n Patent L i t e r a t u r e 2, by
combininga shape s t e e l w i t h t h e s t e e l sheet pilewallwithwhich
the water stopping performance can be e a s i l y enhanced, it i s
p o s s i b l e t o construct a s t e e l wall having both the r i g i d i t y and
the high water stopping performance
However, bycombiningthe shape s t e e l w i t h t h e s t e e l sheet
p i l e , a s e c t i o n a l area thereof becomes l a r g e . Therefore, as
described above, a construction method t h a t can be used is
limited.
[ O O l l ]
Here, it has been considered t o r e i n f o r c e the s t e e l sheet
p i l e wall (wall body) c o n s t i t u t e d of the s t e e l sheet p i l e with
the shape s t e e l , i n which the s t e e l sheet p i l e and a reinforcement
material such as the shape s t e e l are not joined and integrated,
and the s t e e l sheet p i l e is in a s t a t e of being i n contact with
the shape s t e e l . I n t h i s case, i t i s p o s s i b l e t o construct each
of them separately. However, i n a case where the s t e e l sheet
p i l e a n d t h e reinforcementmaterial are constructedseparately,
r e l a t i v e t o a member t h a t is constructed f i r s t , a member t o be
constructed second is driven i n a s t a t e where it is i n contact
withthemember t h a t is c o n s t r u c t e d f i r s t , wherebythe following
problem is caused. That i s , due t o s l i d i n g r e s i s t a n c e between
the s t e e l sheet p i l e and the reinforcement material, a large
force is needed a t the time of driving, or there is a f e a r t h a t
noise andvibratinnmay be generated. Depending on con..;( cuc-tion
accuracy, there is alsoapossibilitythatdeformationmayoccur
t o any of the s t e e l sheet p i l e and the reinforcement material.
Since the member t o be constructed second is driven i n a s t a t e
of being i n contact with the member t h a t is cons-tructed f i r s t ,
a construction method is limited f o r the member t o be driven
second. For example, i t becomes d i f f i c u l t t o rotary press in
a s t e e l pipe as a reinforcement material and t o use a vibratory
type construction method in which a member is driven by being
vibrated.
[0012]
The present invention has been made i n view of the
above-described circumstances and has an objective t o provide
an e a s i l y c o n s t r u c t i b l e s t e e l wall having a s t r u c t u r e i n which
a wall body, which is c o n s t i t u t e d of s t e e l sheet p i l e s to which
itispossibletoeasilyprovidehighwater stoppingperformance
are coupled with eacki other, and which is reinforced by a s t e e l
pipe or a H-shaped s t e e l .
Solution t o Problem
[0013]
In order t o solve the problem, a s t e e l wall according t o
the present invention includes a corrugated-shaped wall body
i n which a p l u r a l i t y of s t e e l sheet p i l e s is coupled by a j o i n t
and i n which a p r o j e c t i o n and a r e c e s s a r e repeated i n a
longitudinal d i r e c t i o n , and a p l u r a l i t y of reinforccruent
m a t e r i a l s c o n s t i t u t e d of a s t e e l pipe or an H-shaped s t e e l t h a t
r e i n f o r c e s the wall body and is arranged i n a longitudinal
d i r e c t i o n of the wall body a t a space with the wall body. A
p a r t o E t h e reinforcementmaterialisina s t a t e ofbeingentered
i n t o a recessedportion of the wall body. The wall body i s coupled
t o the reinforcement material a t head p o r t i o n s t h e r e o f .
[0014]
In the present invention, the wall body and the
reinforcement material are apart, whereby there is little
restriction on the construction method, and it is possible to
selectandusefromvariousconstructionmethodsthatarecapable
of driving a steel pipe andanH-shaped steel as a reinforcement
material into the ground according to a situation.
Thatis, sincethewallbodyandthereinforcementmaterial
are apart, it is possible to separately perform construction
for driving steel sheet piles into the ground while coupling
themwith each other to construct a wall body, and construction
for driving a reinforcement material into the ground. In
addition, the construction is easier since the wall body and
the reinforcement material are not in contact with each other.
For example, by providing a space between the wall body and the
reinforcement material, construction by the vibratory hammer
construction method becomes possible. In a case where the
reinforcement material is a steel pipe, it is also possible to
construct bythe rotarypressinconstructionmethod. Needless
to say, it is alsopossible touse the staticpress-in construction
methodsuchasthehydraulicpressinconstructionmethod. Since
there is little restriction on the construction method in this
way, it is possible to select and use from various construction
methods that are capable of driving a steel pipe and a H-shaped
steel into the ground according to a situation.
[0015]
Ahighwaterstoppingperformanceaswiththeconventional
s t e e l sheet p i l e wall can be obtained.
Furthermore, a large construction space such in a case
of a t i e rod type wall body s t r u c t u r e is not necessary. In
p a r t i c u l a r , by the reinforcement m a t e r i a l e n t e r i n g i n t o a
recessed portion side of the wall body, it is possible t o make
awallwidthsmallerthananadditionofasteelsheetpileheight
and a s t e e l pipe diameter, whereby it is possible t o construct
the s t e e l wall by saving space of a construction space.
[0016]
By the reinforcement m a t e r i a l e n t e r i n g i n t o the recessed
portion side of the wall body, a distance between the
reinforcement material and t h e wall body is s h o r t , whereby unlike
a t i e rod type s t e e l sheet p i l e wall, i n a case where the
reinforcement material and the wall body are coupled by a head
p o r t i o n t h e r e o f , it is possible t o make a s t r u c t u r e capable of
t r a n s m i t t i n g both a t e n s i l e force and a compression force.
That is, ill a case where an earth pressure ant1 a water
pressure a c t on the s t e e l wall, load transmission is performed
between the wall body and the reinforcement m a t e r i a l s i n c e the
head portion of the wall body and the head portion of the
reinforcement material are coupled with each other.
Accordingly, the steelwallmaybeconfiguredtohavea s t r u c t u r e
inwhichthe actingearthpressureandtheactingwaterpressure
maybe sharedand c a r r i e d b y t h e wall body and the reinforcement
material. By coupling and f i x i n g the head portion of the wall
body to the head portion of the reinforcement material, it is
possibletoregulatemisalignmentinaverticaldirectionbetween
the wall body and the reinforcement material, and to transmit
a shear force.
[0017]
In a tie rod type steel sheet pile structure, a waling
material is necessary in order to distribute the acting force
among tie rods discretely disposed in an extension direction
ofthe wall body andto cause thewall body tobehave uniformly.
However, in the present invention, the reinforcement material
enters into the recessed portion side, and the force is
is not necessary.
[0018]
In particular, in a casewhere the reinforcement material
is disposedto every other steel sheet pile or every two or more
steelsheetpiles, if there is a spacebetweenthe reinlorcement
materialandthe steel sheetpile, aneffect ofthereinforcement
material becomes partial, whereby amember fordistributingthe
force in the extensiondirection ofthewalingmaterialbecomes
necessary. However, by the reinforcement material entering
into the recessed portion of the wall body, the reinforcement
material is capable of exerting an effect thereof to the steel
the waling material and the like are not necessary
[0019]
Note t h a t there has been performed an indoor t e s t for
checking behavior of the wall body by, in the middle of a r i g i d
s o i l tank having a width of 1957 mm, a height of 1000 mm, and
a depth of 940 mm, a corrugated acryl i m i t a t i n g t h e s t e e l sheet
p i l e w a l l a n d a n a c r y l i c p i p e i m i t a t i n g t h e s t e e l pipe are fixed
a t lower end s t h e r e o f by anadhesive, a n d i n a statewhere s i l i c a
sand number 5 (dry sand) is i n s t a l l e d by a i r pluviation method
t o the r i g h t and l e f t of the corrugated shape, the sand is dug
down t o the lower end thereof on one s i d e . Through t h i s
experiment, it hasbeenconfirmedthat, w h e n a p i t c h o f t h e s t e e l
pipe is 4/7 or below of the wall height, by disposing the
reinforcement material so as t o enter i n t o the recessedportion
is an e f f e c t of the reinforcement material on skipped portions
as well. Therefore, it is preferred t h a t a pitch L and a wall
height H of the reinforcement material s a t i s f y L 5 4H / 7.
[0020]
In the above-described configuration of the present
invention, it is preferred t h a t the wall body and the
reinforcement material be coupled a t the head portions thereof
by a concrete, which has beendriven across headportions thereof.
[0021]
According t o t h i s configuration, it is configuredto have
a s t r u c t u r e i n which the head portion of the reinforcement
material is coupled with the head portion of the wall body by
the concrete, which has been driven across them, whereby it is
possible to make a structure in which the head portions (upper
end portions) of the steel pipe and the steel sheet pile are
not exposed but covered with the concrete. Accordingly, it is
possible to enhance aesthetics of the steel wall. Since the
concrete is driven so as to extend across the reinforcement
material and the wall body, there is little danger of a top end
between the steel pipe and the wall body being collapsed, and
the like.
[0022]
In the above-described configuration of the present
invention, it is preferred that the wall body and the
reinforcementmaterialarecoupledatheadportionsthereofbeing
joinedbywelding themto a steel sheet installedbetween them.
Accordingtothis configuration, thecouplingbetweenthe
steel sheet and the reinforcement material at the head portion
thereof is performed by welding the steel sheet to the
reinforcement material and the wall body, whereby it is easy
to construct and requires little construction effor-t., For
example, unlike in a case of the tie rodtype, inwhichan effort
to make a hole in the steel sheet pile and the steel pipe sheet
pile through which the tie rod is passed and an ef fort of inserting
the tie rod through the hole are necessary, is not necessary.
Furthermore, compared to a case where the above-described
concrete is driven, a curing period of the concrete is not
necessary, whereby it is possible to reduce a construction
period.
[0023]
In the above-described configuration of the present
invention, the wall body and the reinforcement material are
coupled by being joined by welding to a steel sheet, which is
installed between them, at the head portions thereof, and the
wall body and the reinforcement material may also be coupled
at the head portions thereof by the concrete, which is driven
so as to extend across the head portions thereof.
[0024]
According tothis configuration, coupling by weldingthe
steel sheet and coupling by the concrete are combined, whereby
itispossibletomutuallycomplement-theaestheticsandstrength.
For example, the concrete is excellent in transmitting a
compression force at a coupled portion while the we1dc.d steel
sheet is excellent in transmitting the tensile force at the
coupled portion, whereby the strength may be mutually
complemented. Improvementoftransmissionofthetensil,eforce
bythesteelsheetandlandscapingandsafetymeasure (forexample,
prevention of collapse of the top end) by the concrete
(maintenance of scenery) may be mutually complemented.
[0025]
In the above configuration of the present invention, it
is preferred that the reinforcement material bethe steel pipe.
According tothis configuration, by usingthe steel pipe
as the reinforcement material, it becomes possible to obtain
high rigidityas well as touse the rotarypressin construction
method and the inner excavation construction method, whereby
construction inwhichthenoise andthevibrationare suppressed
becomes easier.
[0026]
In the above-described configuration of the present
invention, it is preferred that a space be set between the wall
body and the reinforcement material such that the steel shee-t
pile in the wall body and the reinforcement material are not
in contact with each other during construction.
[0027]
According to this configuration, when the wall body and
t h e r e i n f o r c e m e n t m a t e r i a l a r e c o n s t r u c t e d , t h e s t e e l s h e e t p i l e
ofthewallbody does not come in contact with the reiniorcement
material during the cons-truction, whereby it is possible to
prevent a problem caused by contact between the
above-describedwallbodyandthe reinforcementmaterial during
the construction.
[0028]
In the above-described configuration of the present
invention, the reinforcement materialmay be provided on a side
ofthe wall body where a relativelylarge pressure is received.
[0029]
According t o t h i s configuration, since the
reinforcementmaterialisprovidedonthe s i d e o f a surfacewhere
the r e l a t i v e l y large pressure ( e a r t h p r e s s u r e andwater pressure)
is received, the wall body and the reinforcement material are
t o receive the pressure. In t h i s case, a load a c t s on the wall
bodyinadirectionawayfromthereinforcementmaterial. Here,
the headportion o f t n e w a l l body is coupled t o t h e headportion
of the reinforcement material, and since it has a s t r u c t u r e in
which load transmission ( t e n s i l e force transmission) is
performedbetweenthewallbodyandthereinforcementmaterial,
it is possible t o share and receive the load between the wall
body and the reinforcement material. Therefore, even if the
reinforcement material i s disposed on the side o f t h e wall body
where t h e r e l a t i v e l y l a r g e pressure is received, it is possible
t o s u f f i c i e n t l y improve the strength by combining the
reinforcement material with the wall body. In a case where the
steel wall is used as, f o r example, bank protection, an
e a r t h - r e t a i n i n g w a l l , and the l i k e , t h e reinforcement material
is disposed on a back surface s i d e . Therefore, on a side where
a top portion of the s t e e l wall is exposed, only a side surface
of the wall body is exposed while the reinforcemen-t material
is i n a hidden s t a t e , whereby it has an external appearance t h a t
i s not complicated and a e s t h e t i c a l l y e x c e l l e n t .
[0030]
In the above-described configuration of the present
invention, the reinforcement material may be provided on an
opposi-te side of a side where the relatively large pressure is
received of the wall body.
[0031]
According to this configuration, the reinforcement
material is provided on the opposite side of the side where the
relativelylargepressureis receivedofthewallbody, whereby
the earth pressure and the water pressure act on the wall body.
In this case, at the coupled portion of the wall body and the
reinforcement material, the load is transmitted fromthe wall
body to the reinforcement material (compression force
transmission),wherebytheearthpressureandthewaterpressure
maybe sharedandreceivedbythewallbodyandthereinforcement
material. In a case where it is used as the bank protection,
earth-retaining wall, and the like, the reinforcement material
is disposed on d front surface side, or a side where the top
portion is exposed, of the wall body. Therefore, for example,
drilling for exposing the head portion of the reinforcement
material duringthe construction is not necessary, and repairs
areeasilymadeonthereinforcementmaterialinanexposedstate
or on the coupled portion ofthe reinforcement material and the
wall body.
Advan-tageous Effects of Invention
[0032]
According to the present invention, it is possible to
obtainhighwaterstoppingperformancesimilartoaconventional
steel sheet pile wall, and to decrease a bending moment that
occurs to the wall body due to the load being transmitted to
the reinforcement material. It has a structure in which the
steel sheet pile and the steel pipe or the H-shaped steel are
combined; however, it is possibleto constructthemseparately,
whereby construction may be made easier.
Brief Description of Drawings
[0033]
Fig. 1 is a schematic plan view illustrating a steel wall
according to a first embodiment of the present invention.
Fig. 2 is a schematic plan view illustrating a principal
part of the steel wall according to the first embodiment.
Fig. 3 i s a s c h e m a t i c s e c t i o n a l v i e w i l l u s t r a t i n g t h e s t e e l
wall according to the first embodiment in the ground.
Fig. 4 is a schematic plan view of a steel wall according
to a modification of the first embodiment of the present
invention.
Fig. 5 is a schematic plan view illustrating a principal
part of a steel wall according to a second embodiment of the
present invention.
Fig. 6 is a schematic sectional view illustrating the steel
wall according to the second embodiment in the ground.
Fig. 7 is a schematic plan view illustrating a principal
part of a steel wall according to a third embodiment of the present
invention.
Fig. 8 is a schematic sectionalview illustrating the steel
wall according to the third embodiment in the ground.
Fig. 9 is a schematic plan view illustrating a principal
part of a steel wall according to a fourth embodiment of the
present invention.
Fig. 10 is a schematic planview illustrating aprincipal
part of a steel wall according to a fifth embodiment of the present
invention.
Fig. 11 is a schematicplanviewillustratinga steel wall
according to amodificationof the fifthembodiment of thepresent
inven Lion.
Fig. 12 is a schematic planview illustrating aprincipal
part of a steel wall according to another modificatioii of the
fifth embodiment of the present invention.
Description of Embodiments
[0034]
Hereinafter, an embodiment of the present invention is
described with reference to the drawings.
As illustrated in Figs. 1 to 3, a steel wall 3 according
to a first embodiment of the present invention is configured
t o combine a hat-shaped s t e e l sheet p i l e 1 a s a s t e e l sheet p i l e
and a s t e e l pipe (reinforcement m a t e r i a l ) 2. The p l u r a l i t y of
s t e e l pipes 2 i s d i s p o s e d a t a space fromeachotherandarranged
i n a l i n e along a longitudinal d i r e c t i o n of a wall body ( s t e e l
sheet p i l e wall) 4 , i n which t h e p l u r a l i t y of hat-shaped s t e e l
sheet p i l e s 1 is coupled.
[0035]
The hat-shaped s t e e l sheet p i l e 1 includes: a web l a ; a
p a i r of flanges 1b each diagonally extending from each of both
side r i m s of the web l a so as t o spread out from each other;
a p a i r of arms l c extending t o the r i g h t and l e f t t o be p a r a l l e l
t o the web l a from a t i p of the r i g h t and l e f t flanges lb; and
a j o i n t i d provided a t a t i p of the arm lc.
[0036]
The hat-shaped s t e e l sheet p i l e 1 is not i n contact with
the s t e e l pipe 2, and there is a space between the hat-shaped
s t e e l sheet p i l e :L and the s t e e l pipe 2. A diameter of I ire s t e e l
pipe 2 is narrower thana width ( e f f e c t i v e width) of the hat-shaped
s t e e l sheet p i l e 1. A p a r t of t h i s s t e e l pipe 2 is i n a s t a t e
of being entered i n t o a recessedportion, which is a valley portion
on one of side surfaces of the wall body constitu-ted of the
hat-shaped s t e e l sheet p i l e s 1.
[0037]
The p l u r a l i t y of hat-shaped s-tee1 sheet p i l e s 1 i s arranged
i n a l i n e by coupling the j o i n t s i d thereof with each other t o
c o n s t i t u t e t h e above-described wall body 4 as the s t e e l sheet
p i l e wall. the hat-shaped s t e e l sheet p i l e 1 andthe s t e e l pipe
2 are driven i n t o the ground.
[0038]
In t h i s s t e e l wall 3, as i l l u s t r a t e d i n Figs. 2 and 3,
a head portion of the wall body 4 c o n s t i t u t e d of the hat-shaped
s t e e l sheet p i l e s 1 is coupled t o a head portion of the s t e e l
pipe 2 by a coping 5. That is, the coping 5 is provided by the
concrete, which is driven by involving the head portion of the
wall body 4 and the head portion of the s t e e l pipe 2. The head
portion of the wall body 4 and the head portion of the s t e e l
pipe 2 enter i n t o t h e concrete t o be the coping 5, whereby the
h e a d p o r t i o n o f t h e w a l l b o d y 4 a n d t h e h e a d p o r t i o n o f t h e steel
pipe 2 are coupled and fixed.
Anupper endopeningportionofthe s t e e l pipe 2 i s b l o c k e d
by the concrete o f t h e coping 5. The coping 5 i s providedalong
the wall body 4 i l l a l e n g t h d i r e c t i o n , andby the copincj 5 having
the same length as the length of one wall body 4, a l l of the
s t e e l pipes 2 are coupled t o the wall body 4 .
[0039]
Relative t o the wall body 4 , the s t e e l pipe 2 is dlsposed
onanopposlte s i d e o f a s i d e w h e r e t h e e a r t h p r e s s u r e i s applied,
or a f r o n t surface s ~ d e w, hich is t o be the side where the earth
pressure is not applied.
The s t e e l w a l l 3 i n t h ~ esx ample is, f o r example, thebank
protection, and r e l a t i v e t o a high side ground surface a, a low
sidegroundsurfacebisawatersidesuchas s e a , l a k e , a n d r i v e r .
Note t h a t the s t e e l w a l l 3 i s notlimitedtothebanlcprotection.
It may be also used i n earth r e t a i n i n g work, cofferdam, a land
reclamation, embankment, and the l i k e .
[0040]
Between the wall body 4 c o n s t i t u t e d of the hat-shaped s t e e l
sheet p i l e s 1 and the s t e e l pipe 2, there is provided a space
so t h a t the wall body 4 (hat-shaped s t e e l sheet p i l e 1) and the
s t e e l pipe 2 do not come i n contact with each other when they
are constructed separately. That is, t o the wall body 4 or t o
the s t e e l pipe 2 t h a t is constructed first, the space is s e t
such t h a t the wall body 4 or the s t e e l pipe 2 t h a t i s constructed
second does not come i n c o n t a c t with each other during the
construction. S p e c i f i c a l l y , i-t is preferred t h a t the space a t
the narrowest p a r t between the wall body 4 and the s t e e l pipe
2 be s e t t o 50 nun or more during the construction. Note t h a t
the space may also be 60 mm or more, 70 mm or more, or 80 mm
or more. Considering a cost required for coupling the head
portion of the wall body 4 and the head portion of the s t e e l
pipe 2, a thickness of the s t e e l wall body as a whole, and the
l i k e , however, it is configured such t h a t a t l e a s t a p a r t of
the s t e e l pipe 2 is being entered i n t o the recessed portion on
the valley side of the corrugated-shaped sheet p i l e wall, i n
which a projection and a r e c e s s (a mountain and a valley) are
repeated, as the wall body 4 .
[0041]
By configuring such t h a t the s t e e l pipe e n t e r s i n t o the
recessed portion of the wall body, it is possible t o perform
hydraulic press i n or r o t a r y p r e s s in of the s t e e l pipe 2 by
graspingthe s t e e l sheet p i l e 4 o f t h e alreadyconstructed s t e e l
sheet p i l e wall and an already driven s t e e l pipe. In a case
where the hydraulic press i n and t h e r o t a r y press i n are performed
by receiving a reaction force by the already constructed s t e e l
sheet p i l e w a l l andthe s t e e l pipe, i n o r d e r t o c o n s t r u c t s t a b l y ,
it is p r e f e r r e d t h a t t h e s t e e l pipebe disposedas close as possible
t o the already constructed s t e e l sheet p i l e wall and the s t e e l
pipe.
[0042]
In t h i s case, for example, depending on a type and the
l i k e of the hat-shaped s t e e l sheet p i l e 1, a depth of the recessed
portion (a disLance between the web l a and the arm l c along a
d i r e c t i o n orthogonal t h e r e t o ) is d i f f e r e n t . For example, i n
a case of the hat-shaped s t e e l sheet p i l e having a width of 900
mm, the depth of the recessed portion is about 200 mm t o 300
mm, whereby it is preferred t h a t the space between the s t e e l
pipe 2 and the web l a of the hat-shaped s t e e l sheet p i l e 1 of
the wall body 4 be not greater than i-t.
[0043]
Next, amethodof constructingthe s t e e l wall 3 is described
herein.
In constructing the steel wall 3, the hat-shaped steel
sheet pile 1 constituting the wall body 4 and the steel pipe
2 to be the reinforcement material are driven separately into
the ground.
At the time, it is possible to drive the hat-shaped steel
sheet pile 1 first into the ground, or to drive the steel pipe
2 first into the grdund. The wall body 4 may be an already
established steel sheet pile wall, and the steel pipe may be
driven for a purpose of reinforcing it and the like.
[0044]
It is possibletoperforminparallela process of driving
the hat-shaped steel sheet pile 1 in order by coupling it to
the hat-shaped steel sheet pile 1 driven in advance, and a process
in which the steel pipe 2 is arranged into a line and driven
in order.
Furthermore, in driving the hat-shaped steel sl~eet pile
1, it is possible to use the hydraulic press in construction
method in which the hat-shaped steel sheet pile 1 is pressed
inbyreceivingthe reaction forcebythehat-shapedstee,lsheet
pile 1 driven first, to use the vibratory hammer construction
method, or to perform drilling by an earth auger for driving.
It is possible to use a cons-truction method similar to
that of the hat-shaped steel sheet pile 1 for pressing in the
steel pipe 2 as well. In the case of the steel pipe 2, it is
p o s s i b l e t o use the r o t a r y p r e s s i n constructionmethod andthe
inner excavation construction method i n which the ground is
d r i l l e d from inside the s t e e l pipe 2 t o press i n the s t e e l pipe
2.
Furthermore, it is also possible t o hydraulic press i n
or r o t a r y p r e s s i n the s t e e l pipe 2 by grasping the s t e e l sheet
p i l e 1 of the already constructed s t e e l sheet p i l e wall or an
alreadydriven s t e e l p i p e . A t t h a t time, bythe s t e e l p i p e b e i n g
entered i n t o the recessed portion of the wall body, positions
of the s t e e l sheet p i l e wall or the s t e e l pipe, by which the
r e a c t i o n f o r c e is received, andthe s t e e l p i p e t o b e constructed
become close t o each other, whereby it is possible t o s t a b l y
construct.
[0045]
In t h i s s t e e l wall 3 , the wall body 4 , which is a s t e e l
sheet p i l e wall, andthe s t e e l pipe 2, which is the reinforcement
material, are d r i v e n i n t o t h e g r o u n d a t a space of, for cxample,
50 mm or more so as not to be i n contact with each other during
the construction, whereby it is possible t o suppress the wall
body 4 and the s t e e l pipe 2 from s l i d i n g such t h a t vibration,
noise, and deformation are not caused during the construction.
[0046]
In a case where the wall body 4 and the s t e e l pipe 2 are
incontactduringtheconstruction, forexample,whenavibratory
type constructionmethod inwhich amember t o be d r i v e n i s vibra ted
during driving or the rotary press in construction method is
adopted, a possibility of causing the above-described noise,
vibration, and deformation may become higher. A usable
constructionmethodmaybe limited, accordingly. In contrast,
in this embodiment, the wall body 4 and the steel pipe 2 are
apart during the construction, whereby there are many choices
in the construction method.
to0471
In a case where the steel sheet pile andthe reinforcement
material are joinedandintegrated, a sectional area of amember
to be driven in to the ground becomes large, whereby it becomes
difficult to be driven. In contrast, in the steel wall 3 of
this embodiment, the wall body 4 and the steel pipe 2 are separately
driven, whereby it becomes easy to construct. Furthermore,
since the wall body 4 and the steel pipe 2 are apart so as to
avoid being contact with each other during the construction,
it becomes much easier to construct than in a case wliere the
wall body 4 and the steel pipe 2 are in contact, as described
above.
[0048]
After the steel sheet pile 1 (wall body 4) and the steel
pipe 2 are driven, the concrete to be the coping 5 is driven
across the wall body 4 and the steel pipe 2. Accordingly, the
headportion ofthe wall body 4 is coupledwith the headportion
of the steel pipe 2.
[0049] ~ ~ - -
In this steel wall 3, the head portion of the wall body
4 is coupled to the head portion of the steel pipe 2, whereby
the load transmission is possible between the wall body 4 and
the steel pipe 2 by the coupled portion. Therefore, the earth
pressure and the water pressure received by the steel wall 3
are shared and received by the wall body 4 and the steel pipe
2 . The head portion of the wall body 4 is coupled to the head
portion of the steel pipe 2, whereby it is possible to prevent
apositionalmisalignmentintheverticaldirectionbetweenthe
steel pipe 2 and the wall body 4. As above, in the steel wall
3, it is possible to decrease the bending moment, which occurs
to the wall body 4 reinforced by the steel pipe 2, from the
independent steel sheet pile wall. It is possible to make the
water stopping performance of the steel wall 3 the same level
as the steel sheet pile wall, whereby even if filling and the
like of themortar are not performedto the joint id, it is l:~ossible
to obtain the same level of the water stopping performance as
the steel pipe sheet pile wall having a joint portion filled
with the mortar.
[0050]
In this embodiment, as illustratedin Fig. 3, in the steel
wall 3, the steel pipe 2 is disposed to an opposite side of a
side where the earth pressure is applied of the wall body 4,
or on the front surface side where the earth pressure is not
applied. Therefore, i n a c a s e w h e r e a n o b j e c t i v e i s t o r e i n f o r c e
the already established s t e e l sheet p i l e wall, even i f there
is an obstacle in an above-ground portion or an under-ground
p o r t i o n o n a b a c k s u r f a c e side, i t i s p o s s i b l e t o i n s t a l l a s t e e l
pipe for reinforcement onthe f r o n t surface side. Furthermore,
even i n a case where the reinforcement is performed with the
s t e e l pipe of the same length, compared t o a case where it is
i n s t a l l e d t o the back, the length t o be driven i n t o t h e s o i l
becomes s h o r t , wherebyitispossibletoreducetheconstruction
e f f o r t and the cost.
[OOSl]
In t h i s embodiment, the s t e e l wall 3 is used as the bank
protection, and the head portion of the s t e e l pipe 2 is coupled
t o the head portion of the wall body 4 by the coping 5. Therefore,
the coping 5 is a coupling material of the head portion of the
s t e e l pipe 2 and the head portion of the wall body 4 , while it
also has a function t o block an opening portion of tlie s t e e l
pipe 2. In t h i s embodiment, a specialized couplingmember such
as a t i e r o d i s not necessarily required, whereby it is possible
t o decrease t h e c o s t .
[0052]
In the s t e e l w a l l 3 according t o t h i s embodiment, a l e n g t h
of the s t e e l pipe 2 is made longer than a v e r t i c a l length of
the wall body 4 (a length of the hat-shaped s t e e l sheet p i l e
1). By making the length of the s t e e l pipe 2 having r e l a t i v e l y
high r i g i d i t y longer, a f r e e design becomes possible such as
t o allow receiving of the earth pressure by the s t e e l pipe 2
and t o allow the wall body 4 t o play the r o l e of preventing outflow
of t h e e a r t h and sand. Accordingly, it becomes possible t o
decreaseasteelweightandtheconstructioncost. Forexample,
it is possible t o make the s t e e l pipe 2 longer than the wall
body 4 and t o allow only the s t e e l pipe 2 t o be embedded i n t o
a support l a y e r .
Note t h a t as d e s c r i b e d l a t e r , t h e length o f t h e s t e e l pipe
2 may be shorter than the v e r t i c a l length of the wall body 4 ,
or the length o f t h e s t e e l pipe 2maybethe same a s t h e v e r t i c a l
length of the wall body 4. The length of the s t e e l pipe 2 is
determined froma viewpoint of the r i g i d i t y and a ground condition.
In a case where boiling, heaving, and an a r c s l i d i n g are concerned
when the length of the s t e e l pipe 2 is the same as the v e r t i c a l
length of the wall body 4 , the v e r t i c a l length of the wall body
4 may be made longer than the s t e e l pipe 2. Furthernic~re, the
wall body 4 may be made longer than the s t e e l pipe 2 i n order
t o cut off ground water.
LO0531
In t h i s embodiment, as i l l u s t r a t e d in Fig. 1, the s t e e l
pipe 2 is disposed t o each of the hat-shaped s t e e l sheet p i l e s
1 of the wall body 4 ( f o r each recessed portion of the wall body
4). However, depending on the required yield strength, it is
n o t n e c e s s a r y t o d i s p o s e t h e s t e e l p i p e 2 t o a l l o f t h e h a t - s h a p e d
s t e e l sheet p i l e s 1. For example, as i l l u s t r a t e d i n Fig. 4 ,
l it is possible t o dispose the s t e e l pipe2 t o every other hat-shaped
s t e e l sheet p i l e 1 (every other recessed p o r t i o n ) , while it is
also p o s s i b l e t o dispose it t o every two hat-shaped s t e e l sheet
p i l e s 1 (everytworecessedportions). Since thereinforcement
material is being e n t e r e d i n t o t h e r e c e s s e d p o r t i o n o f t h e wall
body, it is possible t o exert an e f f e c t of the reinforcement
material t o an adjacent s t e e l sheet p i l e without disposing the
s t e e l pipe t o a l l of the hat-shaped s t e e l sheet p i l e s 1. It
is preferred, however, t h a t the s t e e l pipe 2 be disposed
s u b s t a n t i a l l y equal i n a s t a t e where the s t e e l pipe 2 i s aligned
i n the longitudinal d i r e c t i o n of the wall body 4.
[0054]
The s t e e l sheet p i l e c o n s t i t u t i n g the wall body 4 is not
limitedtothehat-shapedsteelsheetpilel; various s t e e l sheet
p i l e s s u c h a s a u - s h a p e d s t e e l s h e e t p i l e , aZ-shapedsteelsheet
p i l e , and the l i k e may be used.
100551
Next, a second embodiment of the present invention is
described.
As i l l u s t r a t e d in Figs. 5 and 6, i n a s t e e l wall 31 of
the second embodimen-t, the head portion of the s t e e l pipe 2,
the h e a d p o r t i o n o f t h e w a l l body 4 , and the coping 5 are coupled
bya s t e e l p i l l o w m a t e r i a l ( f o r example, a s t e e l s h e e t o r a shape
s t e e l cut i n t o a predetermined length) 6 as a coupling member.
The s t e e l pipe 2 and the wall body 4 have the same v e r t i c a l length.
Besides, aconfigurationthereofisthe sameas t h a t o f t h e s t e e l
wall 3 of the f i r s t embodiment. Therefore, a constituent element
t h a t is the same as t h a t o f t h e f i r s t embodiment i s denotedwith
thesamereferencenumeral, andadescriptionthereofisomitted.
[0056]
In the second embodiment, the s t e e l pillow material 6
( s t e e l m a t e r i a l ) , a s t h e couplingmember, i s p r o v i d e d i n a s t a t e
of being sandwiched between the head portion of the s t e e l pipe
2 and the head portion o f t h e w a l l body 4 . This p i l l o w m a t e r i a l
6 i s f i x e d t o t h e s t e e l pipe2 andthewallbody4 by, forexample,
welding, a b o l t , a d r i l l screw, and the l i k e . Accordingly, the
head portion of the s t e e l pipe 2 is coupled t o the head portion
of the wall body 4 i n a s t a t e where the s t e e l pipe 2 and the
wall body 4 are a p a r t .
In the second embodiment, as described above, the length
of the s t e e l pipe 2 and the v e r t i c a l length (lengtli of the
hat-shaped s t e e l sheet p i l e 1) of thewall body 4 are s u b s t a n t i a l l y
the same.
[0057]
A method of constructing the s t e e l wall 31 according to
the second embodiment i s as follows.
F i r s t , the s t e e l sheet p i l e 1 and the s t e e l pipe 2 are
d r i v e n i n t h e same way as i n t h e f i r s t embodiment. Next, a s t e e l
material t o be the pillow material 6 is i n s t a l l e d between the
steel sheet pile 1 (wall body 4) and the steel pipe 2 and is
fixed by welding, a bolt, a drill screw, and the like to the
steel sheet pile 1 (wall body 4) and to the steel pipe 2,
respectively. Subsequently, in the same way as the first
embodiment, the coping is driven across the wall body 4 and the
i steel pipe 2.
I
I [0058]
In the steel wall 31 of the second embodiment, the head
portion of the steel pipe 2 is coupled to the head portlon of
thewallbody 4 throughboth the coping 5 andthe pillowmaterial
6 . Accordingly, it is possible to more securely transmit the
load received by the wall body 4 to the steel pipe 2 . Except
for this point and an effect based on that the steel pipe 2 and
the hat-shaped steel sheet pile 1 have the same length, it is
possible to obtain the same act and effect as the steel wall
3 of the first embodiment.
[0059]
Next, a third embodiment of the present invention is
described.
As illustrated in Figs. 7 and 8, in a steel wall 32 according
to the third embodiment, the head portion of the steel pipe 2
is coupled to the head portion of the wall body 4 not only by
the coping 5 but also by a pair of plate materials 7 as coupling
members. Furthermore, a vertical length of the wall body 4 is
made longer than the length ofthe steel pipe 2. The steel pipe
2 is disposed on a back surface side of the wall body 4 where
an earth pressure is applied. Besides, it has the same
configuration as the s t e e l wall 3 of the f i r s t embodiment.
Therefore, a constituent element t h a t is the same as t h a t of
the f i r s t embodiment is denotedwiththe samereferencenumeral,
and a description thereof is omitted.
[0060]
In the t h i r d enbodiment, the s t e e l p l a t e materials 7 are
providedin a s t a t e ofbeing sandwichedbetweentheheadportion
of the s t e e l pipe 2 and the head portion of the wall body 4 .
The p l a t e materials 7 are fixed t o the s t e e l pipe 2 and the wall
body4 by welding, a b o l t , andthe l i k e , respectively. Thehead
portion of the s t e e l pipe 2 is coupled t o the head portion of
the wall body 4 i n a s t a t e where t h e s t e e l pipe 2 and the wall
body 4 are a p a r t . Furthermore, by providing the coping 5 by
involving with concrete across the head portion of the s t e e l
pipe 2 andthehe,ldportion o l t h e w a l l b o d y 4, whicharc- coupled
by t h e p l a t e material 7, the head portion of the s t e e l pipe 2
is coupled t o the head portion of the wall body 4 by the coping
5 as well.
[0061]
In the thirdembodiment, as describedabove, t h e v e r t i c a l
length ( l e n g t h o f t h e hat-shaped s t e e l sheet p i l e 1) o f t h e w a l l
body 4 is made longer than the length of the s t e e l pipe 2.
Accordingly, i t is possible t o prevent the boiling, heaving,
and arc sliding as well as to cut off the ground water. By
performing coupling by the plate material 7 in addition to
coupling by the coping 5, it is possible to enhance strength
of the coupled portion of the head portion of the steel pipe
2 and the head portion of the wall body 4. In particular, in
this structure, a tensile load acts between the wall body 4 and
the steel pipe 2, the coupling by the steel plate material 7
becomes further effective.
By providing the steel pipe 2 on the back surface side
o f t h e w a l l b o d ~ 4 , i t i s p o s s i b l e t o h i d e t h e s t e e l p i p e 2 w i t h o u t
exposing it on a front side of the wall body 4, whereby it is
possible to enhance aesthetics of the steel wall 32.
In the steel wall 32 of the third embodiment, it is possible
to obtain the same act andeffect as the first embodiment except
forthe structure ofthe coupledportion, the lengthofthe steel
pipe 2 and the wall body 4, and the act and effect based on the
disposition of the steel pipe 2 relative to rhe wall body 4.
LO0621
Next, a fourth embodiment of the present invention is
described.
As illustrated in Fig. 9, a steel wall 33 according to
the fourthembodiment has anH-shapedsteel9 as a reinforcement
material in place of a steel pipe 2; any other configuration
is the same as the configuration ofthe steel wall3 ofthe first
embodiment. Therefore, a constituent element that is the same
asthatofthefirstembodimentisdenotedwiththesamereference
numeral, and a description thereof is omitted.
[0063]
The steel wall 33 of the fourth embodiment uses theH-shaped
steel 9 as the reinforcement material. The H-shaped steel 9
is disposed along a longitudinal direction of the wall body 4,
to which the hat-shaped steel sheet pile 1 is connected, being
arranged in a line at a space in the same way as the steel pipe
2 of the first embodiment. In the same way as the steel pipe
2 of the first embodiment, the space is provided between the
H-shaped steel 9 and the wall body 4.
100641
Apart of the H-shaped steel 9 is in a state of being entered
into a recessed portion, which is a valley portion on one of
side surfaces of awallbodyconstitutedofthehat-shaped steel
sheet pile 1. The H-shaped steel 9 is disposed such that a web
9a is orthogonal Lo the longitudinal direction of the ~ ~ 1b1od1y
4. Therefore, a flange 9b is parallel to the longitudinal
direction of the wall body 4.
[0065]
The head portion of the wall body 4 is coupled to a head
portion of the H-shaped steel 9. The same method as the first
to third embodiments may be used as a method of coupling the
steel wall 33 to the M-shaped steel 9 as the reinforcement material.
That is, the wall body 4 is coupled to the H-shaped steel 9 by
the coping 5. Note that the wall body 4 and the H-shaped steel
9maybe coupledbywelding througha steelmaterial orby fastening
with a bolt. The head portion of the wall body 4 may be coupled
to the head portion of the H-shaped steel 9 by combining these
methods of coupling.
Except that the reinforcement material is changed from
the steel pipe 2 to the H-shaped steel 9, any other configuration,
such as a relationship between the length of the wall body 4
and the length of the H-shaped steel 9 and disposition of the
H-shaped steel 9 relative to the wall body 4 (including a space
between the wall body 4 and the H-shaped steel 9), may be the
same as that of the first to third embodiments.
[0066]
The method of constructing the steel wall 33 may be the
same as the method of constructing the steel wall of the first
to thirdembodiments exceptthatitisnotpossibleto construct
the H-shaped steel 9 by the inner excavation constructi or1 method
or by the rotary press in construction method.
With the steel wall 33 of the fourth embodiment, it is
possible to obtain the same act and effect as the steel wall
3 ofthe first to thirdembodiments except forthe act andeffect
by the steel pipe 2.
[0067]
Next, a fifth embodiment of the present invention is
described.
As i l l u s t r a t e d in Fig. 10, i n a s t e e l wall 34 of the f i f t h
embodiment, coupling of the head portion of the s t e e l pipe 2
and the headportion o f t h e wall body 4 are performedbywelding
of a s t e e l sheet 8 i n each of the above-described embodiments.
Concrete is not used for coupling the head portion of the s t e e l
pipe 2 and the head portion of the wall body 4 . The configuration
thereof is the same a s t h e s t e e l w a l l 3 o f t h e f i r s t embodiment,
except for t h i s s t r u c t u r e of coupling the head portion of the
s t e e l pipe 2 a n d t h e h e a d p o r t i o n o f t h e w a l l b o d y 4 . Therefore,
the same constituent element is denotedwiththe same reference
numeral, and a description thereof is omitted.
100681
In the s t e e l wall 34 of the f i f t h embodiment, i n the same
way as t h a t o f t h e f i r s t embodiment, t h e p l u r a l i t y o f s t e e l p i p e s
2 is disposed a t a space from each other and arranged in a l i n e
along the longitudinal d i r e c t i o n of the wall body (sheet p i l e
wall) 4, i n which the p l u r a l i t y of hat-shaped s t e e l sh(!ct p i l e s
1 is coupled. It is disposed i n a s t a t e where a part of the
s t e e l pipe 2 is being entered i n t o a recessed portion of the
corrugated s t e e l s h e e t p i l e l i n w h i c h a recess a n d a p r o j e c t i o n
are repeated.
[0069]
The s t e e l sheet8isdisposedbe-tweenthehat-shapedsteel
sheet p i l e 1 of the wall body 4 and the s t e e l pipe 2. In t h i s
embodiment, the s t e e l sheet 8 is disposed between an arm l c of
the hat-shaped s t e e l sheet p i l e 1 and an outer circumference
of the s t e e l pipe 2. In correspondence t o the r i g h t and l e f t
arms l c , for one hat-shaped s t e e l sheet p i l e 1 and one s t e e l
pipe 2, a p a i r of the s t e e l sheets 8 is provided i n t h e r i g h t
and l e f t .
[0070]
One of edges of the s t e e l sheet 8 is welded to the arm
l c o f t h e h a t - s h a p e d s t e e l s h e e t p i l e 1 a n d t h e o t h e r e d g e t h e r e o f
is welded t o the outer circumference of the s t e e l pipe 2.
In constructing the s t e e l wall 34, construction of the
wall body 4 and driving of the s t e e l pipe 2 are performed in
the same way as those i n the f i r s t embodiment. A f t e r the
construction of -the wall body 4 and the driving of the s t e e l
pipe 2 are completed, the s t e e l sheet 8 is welded t o the hat-shaped
s t e e l sheet p i l e 1 of the wall body 4 and the s t e e l pipe 2.
[0071]
In the stei.1 wall 34 of the f i f t h embodiment, t oupling
between the head portions of the wall body 4 and the s t e e l pipe
2 i s p e r f o r m e d b y w e l d i n g o f t h e s t e e l s h e e t 8 , wherebyitbecomes
easy t o construct. A cure time is not necessary unlike i n a
case where the concre-te is used f o r coupling, whereby the
construction period becomes s h o r t .
LO0721
Note t h a t i n t h i s embodiment, as i l l u s t r a - t e d i n Fig. 11,
the s t e e l sheet 8 may be disposed between the web l a of the
hat-shaped s t e e l sheet p i l e 1 and the o u t e r p e r i p h e r a l surface
of the s t e e l pipe 2, or it may be disposed between a flange l b
and the o u t e r p e r i p h e r a l surface of the s t e e l pipe 2.
Relative t o the hat-shaped s t e e l sheet p i l e 1, it is also
possible t o skip a pitch of the s t e e l pipe 2 ( f o r example, t o
dispose the s t e e l pipe 2 t o every other hat-shaped s t e e l sheet
p i l e 1 or every two or more hat-shaped s t e e l sheet p i l e s 1) and
t o u s e t h e s t e e l p i p e 3 h a v i n g a d i a m e t e r l a r g e r t h a n a n e f f e c t i v e
width of the hat-shaped s t e e l sheet p i l e 1.
It is a l s o possible t o dispose the s t e e l pipe 2 on a side
o f t h e w a l l b o d y 4 where a relativelylargepressureis received
or t o dispose it on an opposite side thereof.
LO0731
As a s t e e l wall 34A i l l u s t r a t e d i n Fig. 12, i n addition
t o the coupling by welding of the s t e e l sheet 8, in the same
way a s t h e f i r s t embodiment, it is a l s o possible t o provide a
coping 5 b y c o n c r ~ ~ t e t h a tdirsi venbyinvolvingthe heatiportion
of the wall body 4 and the head portion of the s t e e l pipe 2.
In t h i s case, the concrete is t o be driven a f t e r the welding
of the s t e e l sheet 8.
The wall body 4 and the s t e e l pipe 2 are coupled by the
concrete i n addition t o the welding of the s t e e l sheet 8.
[ 0 0 7 4 ]
In t h i s case, it is possible t o r e a l i z e a complementary
s t r u c t u r e i n which, for example, transmission of a compression
force between the wall body 4 and the steel pipe 2 is performed
mainly by the concrete, and transmission of a tensile force is
performed mainly by the steel sheet 8. It is also possible to
attain blockage of an upper end opening portion of the steel
pipe 2 by the above-described concrete, prevention of collapse
of the top end, and the like.
The steel wal1.s 3, 31, 32, 33, 34, and 34A may also be
constructedby setting an already established steel sheet pile
wall as the wall body 4 and by driving the steel pipe 2 or the
H-shaped steel 9 relative to this wall body 4.
Reference Signs List
[0076]
1 hat-shaped steel sheet pile (steel sheet pile)
1 d joint
2 steel pipe (reinforcement material)
3 steel wall
5 coping
8 steel sheet
9 H-shaped steel (reinforcement material)
31 steel wall
3 2 steel wall
33 steel wall
3 4 steel wall
34A steel wall
CLAIMS
1. A s t e e l wall, comprising:
a corrugated-shaped wall body i n which a p l u r a l i t y of s t e e l
sheet p i l e s is coupled by a j o i n t and in which a p r o j e c t i o n and
a r e c e s s are repeated in a l o n g i t u d i n a l d i r e c t i o n ; and
a p l u r a l i t y of reinforcement materials c o n s t i t u t e d of a
s t e e l pipe or an H-shaped s t e e l t h a t r e i n f o r c e s the wall body
and is arranged i n a l o n g i t u d i n a l d i r e c t i o n of the wall body
a t a space with the wall body, wherein
a p a r t o f t h e reinforcementmaterialisinastateofbeing
entered i n t o a recessed portion of the wall body, and
the wall body is coupled t o the reinforcement material
a t head p o r t i o n s t h e r e o f .
2. The s t e e l wall according t o claim 1, wherein the
reinforcement material i s i n s t a l l e d t o every other s t e e l sheet
p i l e or every two or more s t e e l sheet p i l e s .
3. The s t e e l w a l l a c c o r d i n g t o c l a i m 1 , wherein thewall body
iscoupledtothereinforcementmaterialatheadportionsthereof
by concrete, which is driven across the head p o r t i o n t h e r e o f .
4 . The s t e e l wall according t o c l a i m l , wherein thewall body
and the reinforcement material are coupled a t head portions
thereof by each being joined to a steel sheet installed
therebetween by welding.
5. The steelwall according to claim4, whereinthe wallbody
and the reinforcement material are coupled at head portions
thereof by concrete driven across the head portions thereof.
6. The steel wall according to any one of ~laims1 to 5, wherein
the reinforcement material is the steel pipe.
7. The steel wall according to any one of claims 1 to 5, wherein
there is seta space betweenthe wall body andthe reinforcement
material such that the steel sheet pile of the wall body and
the reinforcement material do not contact each other during
construction.
8. The steel ~ ~ 1ac1c1or ding to any one of claims 1 to 7, wherein
the reinforcement material is provided on a side of the wall
body where a relatively large pressure is received.
9. The steel wall according to any one of claims 1 to 5, wherein
the reinforcement material is provided on an opposite side of
the side of the wall body where the relatively large pressure
is received.