FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION
A METHOD FOR POSITIONING AN INTEGRAL TYPE I GIRDER SUPERSTRUCTURE
ARRANGEMENT ON A METAL PORTAL
2. APPLICANT(S):
a) Civil Globe Consultants Private Limited
b) A company incorporated under the laws of India
c) 404, Satra Plaza, Palm Beach Road, Sector-19D, Vashi, Navi Mumbai-400703,
INDIA.
3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to
be performed.
1
5 FIELD OF THE INVENTION:
The present invention relates to positioning of metal framework structures at the
construction sites. More particularly, the present invention relates to a method for
positioning an integral type I girder superstructure arrangement on a metal portal
using a specially designed metal framework structure which carries loads of the
10 connected girders throughout itself and eliminates the need of any ground level
support like a trestle and allows the traffic movement underneath without diversion.
BACKGROUND OF THE INVENTION:
While constructing a flyover or a metro/train bridge, trestle beams and multiple
columns are needed to support the deck and girders from the ground level until the
15 construction procedure is complete. Alternatively, a crane is positioned to hold the
steel girder until the connections are established with a portal frame. However, using
trestles can cause many problems like traffic, congested roads, diversion of the traffic
route etc which ultimately disrupt the daily life of the people passing thereby.
Placement of trestle under the under-construction flyover also creates fear of falling or
20 loosening of the bolt connections which can adversely affect people or other
properties. Long term requirement of trestle support to the girder means never ending
traffic problems. Therefore, an alternative solution is required to overcome above
mentioned problems and minimizing the need of trestles at the traffic junction.
The present invention provides an alternative solution which eliminates the need of
25 using trestles or any kind of ground level support thus, completing the construction
process without disturbing underneath traffic route.
OBJECT OF THE INVENTION:
The primary objective of the present invention is to disclose a method for positioning
an integral type I girder superstructure arrangement on a metal portal.
30 Another objective of the present invention is to disclose the method which eliminates
the need of any ground level support like a trestle and allows the traffic movement
underneath without diversion.
2
5 Another objective of the present invention is to disclose the method wherein two or
more girders are connected to the metal framework structure by means of bolts which
enables underneath traffic to move freely without much hindrance.
A further objective of the present invention is to disclose the method wherein the said
structure can easily be removed as the connections are made by using bolts.
10 Still another objective of the present invention is to disclose the method wherein the
said metal framework structure is reused for the launching of a similar type of
superstructure.
Yet another objective of the present invention is to disclose the method which
involves easy and simple steps for launching of the girder superstructure arrangement
15 on the metal portal structure.
Other objects and advantages of the present invention will become apparent from the
following description taken in connection with the accompanying drawings, wherein,
by way of illustration and example, the aspects of the present invention are disclosed.
SUMMARY OF THE INVENTION:
20 In accordance with the main embodiment of the present invention, a method for
positioning an integral type I girder superstructure arrangement on a metal portal is
disclosed. The method comprising the steps of assembling, two or more premanufactured metal portal columns by means of bolts so as to form a strong and
stable metal portal structure; vertically positioning, each said portal columns at the
25 left and right side of a flyover road; perpendicularly placing and bolting, a preassembled metal portal pier on the said portal column by means of a weight lifting
vehicle; placing, a metal framework arrangement over the said metal portal columns
by means of the weight lifting vehicle and connecting ends of said metal framework
arrangement with top ends of the said portal columns, and securing by means of bolts;
30 temporarily attaching, removable metal brackets, a trestle and sand jacks below the
said metal framework arrangement by means of bolts; positioning, a girder (G1) onto
the assembled metal framework arrangement by means of said weight lifting vehicle,
and connecting one end of the said girder (G1) to the right side of said metal
framework arrangement and other end of the said girder (G1) to a distantly placed an
35 end cross girder (P4) secured on a metallic column by means of bolts; positioning,
3
5 another girder (G2) onto the assembled metal framework arrangement by means of
said weight lifting vehicle, and connecting one end of the said girder (G2) to the left
side of said metal framework arrangement and other end of the said girder (G2) to the
distantly placed end cross girder (P6) secured on the metallic column by means of
bolts; repeating, steps vi & vii for similarly launching another set of girders (G3, and
10 G4) and bolting the arrangement using bolts; removing, metal brackets, a trestle and
sand jacks from the said metal framework arrangement; laying, decking sheets and
temporally fixing the removal metal brackets for deck slab staging; performing
casting, of the deck slab, crash barrier and laying of wearing coat on the assembled
superstructure by following the conventional method; allowing, the filled material to
15 settle down and harden for a few days; and removing, the deck sheets metal brackets
from the said girders (G1, G2, G3 and G4).
Other objects and advantages of the present invention will become apparent from the
following description taken in connection with the accompanying drawings, wherein,
by way of illustration and example, the aspects of the present invention are disclosed.
20 BRIEF DESCRIPTION OF DRAWINGS:
The present invention will be better understood after reading the following detailed
description of the presently preferred aspects thereof with reference to the appended
drawings, in which features, other aspects and advantages of certain exemplary
embodiments of the invention will be more apparent from the accompanying
25 drawings in which:
Figure 1 illustrates a front view of a vertically positioned metal portal column (stage
1) in accordance with an embodiment of the present invention,
Figure 2 illustrates a top view of assembled temporary trestle, metal brackets below a
metal framework structure (stage 2) in accordance with an embodiment of the present
30 invention,
Figure 3 illustrates a top view of connected girders (G1, G2) to the metal framework
structure and end cross girders (P4, P6 at stage 3) in accordance with an embodiment
of the present invention,
4
5 Figure 4 illustrates a top view of connected girders (G3, G4) to the metal framework
structure and end cross girders (P4, P6 at stage 4) in accordance with an embodiment
of the present invention,
Figure 5 illustrates a top view of connected girders (G1, G2, G3 & G4)) to the metal
framework structure and end cross girders (P4, P6 at stage 5) in accordance with an
10 embodiment of the present invention,
Figure 6 illustrates a top view of fully constructed girders ready for deck slab staging
(stage 6) in accordance with an embodiment of the present invention.
DETAILED DESCRIPTION:
The following description describes various features and functions of the disclosed
15 device and methods with reference to the accompanying figures. In the figures,
similar symbols identify similar components, unless context dictates otherwise. The
illustrative aspects described herein are not meant to be limiting. It may be readily
understood that certain aspects of the disclosed system, method and apparatus can be
arranged and combined in a wide variety of different configurations, all of which are
20 contemplated herein.
These and other features and advantages of the present invention may be incorporated
into certain embodiments of the invention and will become more fully apparent from
the following description and claims or may be learned by the practice of the
invention as set forth hereinafter.
25 Accordingly, those of ordinary skill in the art will recognize that various changes and
modifications of the embodiments described herein can be made without departing
from the scope of the invention. In addition, descriptions of well-known functions and
constructions are omitted for clarity and conciseness.
The terms and words used in the following description and claims are not limited to
30 the bibliographical meanings, but, are merely used to enable a clear and consistent
understanding of the invention. Accordingly, it should be apparent to those skilled in
the art that the following description of exemplary embodiments of the present
invention are provided for illustration purpose only and not for the purpose of limiting
the invention.
5
5 It is to be understood that the singular forms “a,” “an,” and “the” include plural
referents unless the context clearly dictates otherwise.
It should be emphasized that the term “comprises/comprising” when used in this
specification is taken to specify the presence of stated features, integers, steps or
components but does not preclude the presence or addition of one or more other
10 features, integers, steps, components or groups thereof.
In accordance with the present invention, a method for positioning an integral type I
girder superstructure arrangement on a metal portal structure is provided. The method
of the present invention overcomes the problem of traffic jam and diversion
occurrence due to placement of multiple large trestles underneath girders, required for
15 providing temporary support to the girders from the ground level for ongoing
construction like a metro flyover etc. Conventionally, trestles are used for supporting
the girders from the ground level till the construction is over which blocks the road
and causes traffic jams or diversion of the traffic to another route. Therefore, specially
designed metal framework is constructed and placed on the metal portal columns
20 which evenly hold the weight of the connected girder’s ends and eliminate the need of
support required from the ground level and won’t disrupt the traffic movement or
cause any congestion nearby the constructed area.
As per Figure 1 and stage 1 of the present invention, a front view of a vertically
positioned metal portal column is provided. In stage 1, the pre-manufactured metal
25 portal columns are assembled together using bolts so as to form a strong and stable
metal portal structure which will hold the weight of the specially designed metal
framework structure and connected girders during construction period. The metal
portal columns have specific dimensions which can vary as per the construction
requirement. The assembled portal columns are then vertically positioned at the left
30 and right side of the road with temporary brackets around it to provide stability at the
initial stage at the construction site of a flyover. Further, a pre-assembled metal portal
pier is perpendicularly placed on each said portal column and bolted together with
bolts. After placement of the portal piers, a metal framework arrangement is placed
over the said metal portal column by means of the weight lifting vehicle and is
35 secured firmly by means of bolts. This placement results in connecting the top two
ends of the said portal piers and columns which will help in carry the load of the
6
5 connected girders. The said metal framework arrangement is designed in such a way
that it distributes weights of the connected girders evenly throughout its structure and
eliminates the need of any kind of support from the ground level like placing a trestle
beneath the girders till construction is completed. The placement of the trestle for a
long period of time, results in traffic jams and diverting the vehicles towards another
10 route which could be already full of vehicles thus, causing traffic jams for long hours.
As per Figure 2 of the present invention, a top view of assembled temporary trestle,
metal brackets below a metal framework structure is provided. At stage 2 of the
present invention, when the metal framework arrangement structure, portal piers and
portal columns are assembled and bolted properly, a temporary trestle, and metal
15 brackets are vertically attached to the metal framework structure so as to rigidly
provide support to the ongoing constructed metal framework. The trestle is attached
initially for installation purposes and is removed later in the next stage. Further, the
brackets are removable and attached to the metal framework structure by using bolts.
As per Figure 3 of the present invention, a top view of connected girders (G1, G2) to
20 the metal framework structure and end cross girders (P4, P6) is provided. At stage 3,
one end of the girder (G1) is connected to the right side of the said metal framework
with the help of bolts, and other end of the said girder (G1) is connected to a distantly
placed an end cross girder (P4) which is secured on a metallic column by means of
bolts. Similarly, another girder (G2) is positioned onto the assembled metal
25 framework arrangement by means of said weight lifting vehicle which can be a crane,
and one end of the said girder (G2) is connected to the left side of said metal
framework arrangement and other end is connected to the distantly placed end cross
girder (P6) secured on the metallic column by means of bolts.
As per Figure 4 of the present invention, a top view of the connected girders (G3, G4)
30 to the metal framework structure and end cross girders (P4, P6) is provided. At stage
4, while launching the girders (G3, G4), similar steps are followed as mentioned
above in case of launching of the girders (G1, G2). One end of the girder (G3) is
connected to the right side of the said metal framework with the help of bolts, and
other end of the said girder (G3) is connected to the distantly placed end cross girder
35 (P4)secured on the metallic column by means of bolts. Correspondingly, another
girder (G4) is positioned onto the assembled metal framework arrangement by means
7
5 of said weight lifting vehicle, and its one end is connected to the left side of said metal
framework arrangement and other end is connected to the distantly placed end cross
girder (P6) secured on the metallic column by means of bolt.
As per Figure 5 of the present invention, a top view of connected girders (G1, G2, G3
& G4) to the metal framework structure and end cross girders (P4, P6). At stage 5,
10 establishing a strong and a firm connection between girders, metal framework
structure and end cross girders (P4, P6) completes the metal framework which will be
ready for the next stage of filling the required materials in between the connected and
assembled structures. After placement of the girders (G1, G2, G3 & G4), the metal
framework structure evenly distributed the load of the girders structure throughout its
15 surface and the connected trestle and temporary metal brackets are removed from the
said metal framework structure.
As per Figure 6 of the present invention, a top view fully constructed girders ready for
deck slab staging is provided. At stage 6, once the trestle and temporary metal
brackets are removed, the deck slab staging proceeds next where the deck sheets laid
20 and temporary metal brackets are fixed to prevent spillage of filling material. The
deck slab and crash barrier is casted followed by laying of the wearing coat. The filled
material and coating is allowed to settle down and harden for a few days. After
monitoring the site, the deck sheets metal brackets from the said girders (G1, G2, G3
and G4) are removed.
25
30
8
5 We Claim:
1. A method for positioning an integral type I girder superstructure arrangement on
a metal portal, comprising:
i. assembling, two or more pre-manufactured metal portal columns by means of
bolts so as to form a strong and stable metal portal structure;
10 ii. vertically positioning, each said portal columns at the left and right side of a
flyover road;
iii. perpendicularly placing and bolting, a pre-assembled metal portal pier on the
said portal column by means of a weight lifting vehicle;
iv. placing, a metal framework arrangement over the said metal portal columns
15 by means of the weight lifting vehicle and connecting ends of said metal
framework arrangement with top ends of the said portal columns, and
securing by means of bolts;
v. temporarily attaching, removable metal brackets, a trestle and sand jacks
below the said metal framework arrangement by means of bolts;
20 vi. positioning, a girder (G1) onto the assembled metal framework arrangement
by means of said weight lifting vehicle, and connecting one end of the said
girder (G1) to the right side of said metal framework arrangement and other
end of the said girder (G1) to a distantly placed an end cross girder (P4)
secured on a metallic column by means of bolts;
25 vii. positioning, another girder (G2) onto the assembled metal framework
arrangement by means of said weight lifting vehicle, and connecting one end
of the said girder (G2) to the left side of said metal framework arrangement
and other end of the said girder (G2) to the distantly placed end cross girder
(P6) secured on the metallic column by means of bolts;
30 viii. repeating, steps vi & vii for similarly launching another set of girders (G3,
and G4) and bolting the arrangement using bolts;
ix. removing, metal brackets, a trestle and sand jacks from the said metal
framework arrangement;
9
5 x. laying, decking sheets and temporally fixing the removal metal brackets for
deck slab staging;
xi. performing casting, of the deck slab, crash barrier and laying of wearing coat
on the assembled superstructure by following the conventional method;
xii. allowing, the filled material to settle down and harden for few days; and
10 xiii. removing, the deck sheets metal brackets from the said girders (G1, G2, G3
and G4).
2. The method as claimed in claim 1, wherein the said girders (G1 or G2)
comprising two or more longitudinal metallic beams of same dimension.
15
3. The method as claimed in claim 1, wherein the said metal framework
arrangement eliminates the need of using a trestle required for supporting the
girders from the ground level.