ANTI-NOISE INSTALLATION FOR GUIDED TRANSPORT TRACK AND GUIDED
TRANSPORT TRACK EQUIPPED WITH SUCH AN INSTALLATION
1. Technical field of the invention
The invention relates to an anti-noise installation for a guided transport track , in particular
for a viaduct having a U-shaped cross section. The invention also relates to a guided
transport track, and in particular a viaduct, equipped with an installation according to the
invention.
2. Technological background
Public guided transport such as metros and trains generate high noise levels that result in
particular from the interactions between the wheels of the transport vehicles and the
runways such as rails on which these vehicles travel.
This problem of noise is a particular nuisance when the tracks are laid out in urban areas, in
the immediate vicinity of residential zones, in particular in the context of viaducts or
overhead tracks.
One of the technical solutions frequently used on this type of track is that of installing
. acoustic barriers two to three metres high that border the track so as to trap the noise and
limit the propagation thereof beyond the immediate vicinity. These barriers make it possible
to counter the propagation of noise by reflecting the acoustic waves that reach the internal
face of the barrier.
This solution does however have several drawbacks, including the fact that the field of vision
of the nearby residents is obstructed due to the presence of particularly imposing acoustic
barriers.
Apart from the visual impact, the acoustic barriers are ineffective, or even aggravate the
noise situation for nearby residents living in buildings located higher than the viaduct,
because of the multiple reflections off the vehicle bodies or the screens on the opposite
track.
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Furthermore, this solution requires a large amount of space and has significant wind
resistance, which has a not insignificant impact on the forces to which the engineering
structure is subjected, and weighs down the structure on which it is used. Thus it is only
possible to equip engineering structures, and in particular viaducts, that have been oversized
during construction with anti-noise barriers of this kind. Only oversized viaducts can
subsequently withstand new stresses and therefore be equipped with these anti-noise
barriers. Other structures are condemned to be noisy and therefore to be detrimental to the
nearby residents and/or to make the surrounding areas unpropitious for residential
accommodation.
Finally, the solution of anti-noise barriers provided along tracks does not make it possible,
once the barriers have been installed along the track, to modify the performance level,
unless the anti-noise barriers are replaced by new barriers.
It is therefore necessary to provide a novel solution for limiting the noise caused by the
passage of guided transport vehicles on engineering structures of the viaduct or bridge type.
It is also necessary to provide a solution that makes it possible to adapt all types of viaduct,
in particular viaducts that have not been oversized during construction.
It is also necessary to provide a solution that makes it possible to provide different
. performance levels according to the needs expressed by the nearby residents.
3. Objectives of the invention
The invention aims to overcome at least some of the drawbacks of the known solutions for
limiting the noise heard by those living alongside engineering structures, of the bridge or
viaduct type, in particular viaducts having a U-shaped cross section, in particular in the form
of a splayed U.
In particular, the invention aims to provide an anti-noise installation for a viaduct that does
not impact on the visual field of the nearby residents.
The invention also aims to provide, in at least one embodiment, an anti-noise installation that
can be adapted to various viaduct designs without major difficulty.
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The invention also aims to provide, in at least one embodiment of the invention, an antinoise
installation that is easy to maintain.
The invention also aims to provide, in at least one embodiment of the invention, an
installation that makes it possible to respond to various distinct performance levels.
The invention also aims to provide, in at least one embodjment, a viaduct equipped with an
anti-noise installation according to the invention.
4. Disclosure of the invention
To do this, the invention relates to an anti-noise installation for a guided transport track
having aU-shaped cross section, in particular in the form of a flared U, the two branches of
which form the lateral walls of the track and the central zone of which, connecting the two
branches, forms at least one runway for a guided transport vehicle, characterised in that said
installation comprises a plurality of acoustic panels arranged relative to one another so as to
form at least one chamber for confining a source of noise resulting from the passage of a
vehicle on said runway, which chamber can be provided around said noise source while
extending as far as a free end of at least one branch of the U, each acoustic panel forming at
least one portion of a partition of a noise-confinement chamber.
The invention therefore makes it possible to form at least one noise-confinement chamber
arranged around the source of the noise, which results from the passage of the wheels of a
vehicle over the runway, for example wheels of a train on the rails, and the free end of the
lateral walls of the U-shaped viaduct A noise-confinement chamber is a chamber that has
partitions suitable for optimally insulating the space containing the sources of noise from the
space downstream thereof and thus for attenuating the noise. The invention proposes
confining the sources of noise resulting from the dynamic interaction of the wheels of a
vehicle with the runway by using the space available between these sources and the lateral
walls of the U-shaped viaduct Since space is limited, the invention proposes using a
plurality of acoustic panels and arranging them relative with one another so as to form
various partitions of at least one noise-confinement chamberwithout these exceeding the
outer dimensions of the viaduct, such that the visual impact of the installation is limited.
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The invention uses and optimises the U-shape of the viaduct by forming a noise-confinement
chamber that lies entirely within the permitted space between the source of the noise and
the free end of the branches of the U. In other words, each portion of the U-shaped viaduct
is used to reduce the noise emissions. The invention therefore takes advantage of the
specific shape of the viaduct for reducing the noise emissions by integrating various acoustic
panels therein.
Furthermore, the confinement chamber is provided around the source of the noise,
extending as far as the free end of the lateral walls. In other words, the acoustic panels do
not extend beyond the viaduct. In particular, no acoustic panel projects beyond the free end
of the lateral walls. All the acoustic panels are therefore provided between the lateral walls of
the viaduct. The visual impact of an anti-noise installation is therefore zero for the nearby
residents. A viaduct that is carefully designed and that has aesthetic curves is therefore not
compromised by the arrangement of an anti-noise installation according the invention, unlike
the noise-reduction barriers of the prior art.
According to the invention, the confinement chamber is formed by arranging a plurality of
acoustic panels, each panel forming at least one portion of a partition of a confinement
chamber. It is therefore particularly easy to adapt the shape and dimensions of the noiseconfinement
chambers to the dimensions of the vehicles travelling on the track by moving
and/or modifying the shape and dimensions of one or more acoustic panels.
It is also particularly easy to adapt the shape and dimensions of noise-confinement
chambers to the required performance level. For example, an installation according to the
invention makes it possible to adapt the sound attenuation produced to a specific
requirement by modifying the shape of the confinement chamber produced by the
arrangement of the acoustic panels. The performance may also be determined by the type of
acoustic panels used. Furthermore, depending on the dimensions of the vehicle travelling on
the track, only some of the acoustic panels of the plurality of acoustic panels may be used.
The confinement chamber is preferably formed by the combination of the acoustic panels,
the vehicle and the U-shaped viaduct. In other words, the acoustic panels are at least
arranged so as to form partitions where the vehicle and the viaduct do not form walls
preventing the propagation of the noise.
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Advantageously, and according to the invention, each acoustic panel is either an absorbent
panel or a blocking panel. An absorbent panel is an acoustic panel comprising a material
suitable for absorbing at least some of the noise that reaches it. A blocking panel is an
acoustic panel formed of a material suitable for blocking the propagation of the acoustic
waves that reach it.
Advantageously, an installation according to the invention comprises at least one acoustic
panel, referred to as a cap, suitable for being mounted on )he free end of at least one branch
of the U, in parallel with said runway, extending in the direction of the branch of the U facing
the branch on which it is mounted, so as to form a top partition of a noise-confinement
chamber.
Each cap forms an upper partition of at least one noise-confinement chamber. Each cap is
arranged at the end of a lateral wall of the track towards the lateral wall of the opposite track,
in parallel with the runway. In other words, each cap delimits the upper part of the chamber
while not extending beyond the viaduct. An anti-noise installation according to the invention
and according to this variant therefore does not create a visual impact for nearby residents.
Each cap forms, together with the lateral wall of the U-shaped viaduct on which it is
arranged, a cavity that traps the acoustic waves emitted by the noise source, which
substantially reduces the noise transmitted to those living near the viaduct when vehicles
pass over the transport track. The cap may have dimensions so as to extend as close as
. possible to the vehicle travelling on the track in order to limit to the maximum possible extent
the leakage surface formed by the space between the free end of the cap and the vehicle.
Advantageously, an anti-noise installation according to the invention comprises at least one
acoustic panel, referred to as a skirt, suitable for being carried by said vehicle
perpendicularly to said runway, and at least one acoustic panel, referred to as a bottom
screen, suitable for being mounted on said runway facing said skirt, so as form a lateral
partition of at least one noise-confinement chamber.
An anti-noise installation according to this variant therefore makes it possible to form, by
combining a skirt carried by the vehicle and a bottom screen mounted on the runway, a
lateral partition of a localised noise-confinement chamber that moves when the vehicle
moves. In particular, the chamber is only formed when the train is present on the viaduct.
This lateral partition is not continuous, but has a space between the skirt and the bottom
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screen to enable the vehicle to travel on the track. This space between the bottom screen
and the skirt determines the leakage surface towards the outside of the confinement
chamber to which the formed partition belongs. This surface can therefore be parameterised
by adapting the dimensions of the skirt and of the bottom screen to the dimensions of the
vehicles travelling on the track.
Preferably, the installation comprises two skirts carried laterally on each side of the vehicle
and a bottom screen mounted on the track facing each skirt.
Advantageously, an anti-noise installation according to the invention comprises at least one
acoustic panel, referred to as a lateral panel, suitable for being mounted in the vicinity of a
lateral wall of the track, perpendicularly to the runway, so as to form a lateral partition of at
least one noise-confinement chamber.
In a variant or in combination, the installation comprises at least one acoustic panel, referred
to as a lateral mat, suitable for being attached to the lateral wall of the track, forming a
branch of the U, so as to form a lateral partition of at least one noise-confinement chamber.
A lateral mat can follow the shape of the lateral wall of the U-shaped track so as to form a
lateral partition of a noise-confinement chamber.
Advantageously, an anti-noise installation comprises at least one acoustic panel, referred to
as a slab, suitable for being attached to the runway so as to form a bottom partition of at
least one noise-confinement chamber.
Advantageously and according to the invention, said acoustic panels, in particular the
absorbent panels, are suitable for being arranged in various distinct configurations so as to
form at least one noise-confinement chamber that is compatible with the design of said
guided transport track on which the installation is used.
An installation according to this variant makes it possible to adapt the design of the
confinement chambers formed by the arrangement of the acoustic panels, in particular the
absorbent panels, to various types of track and to the specific constraints and requirements
of each track.
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Advantageously, an installation according to the invention further comprises means for
removably attaching said acoustic pqnels, in particular the absorbent panels, so as to allow
easy installation/removal of each ac~stic panel, in particular of each absorbent panel.
According to this variant, the installation and removal of an acoustic panel on the track or on
the vehicle is done by means of removable attachment means, which makes it easier to
maintain an anti-noise installation according to the invention and which makes it possible to
easily adapt the design of the chambers formed by the ac:oustic panels to the dimensions of
the vehicles travelling on the track. These removable attachment means comprise, for
example, means of the screw-and-nut type.
Advantageously and according to the invention, said acoustic panels are arranged relative to
one another so as to form at least two noise-confinement chambers that can be provided in
series between the noise source and a free end of at least one branch of the U.
According to this variant, the installation forms at least two noise-confinement chambers
arranged in series between the noise source and the outside of the viaduct. In particular, the
first confinement chamber leads into the second confinement chamber, which leads to the
outside of the viaduct, at the cap. The first chamber comprises, for example, a bottom
partition formed by slabs, lateral partitions formed by skirts and bottom screens, and a top
partition formed by the vehicle. The second confinement chamber comprises, for example, a
bottom partition formed by slabs, lateral partitions formed respectively by a skirt and a
bottom screen (this partition is common with the first chamber), and by a lateral mat, and a
top partition formed by a cap. The space between the skirt and bottom screen of the
common partition forms a passage from the first chamber to the second chamber. The space
between the free end of the cap and the vehicle forms a leakage surface of the second
chamber.
An anti-noise installation according to the invention can be used in connection with a guided
transport track comprising two adjacent runways. In this case, the anti-noise installation
advantageously comprises at least one acoustic panel, referred to as a central panel,
suitable for being attached to the track between the two runways while extending
perpendicularly to the runways so as to form a lateral partition of at least one noiseconfinement
chamber.
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Advantageously and according to the invention, at least one absorbent acoustic panel is
formed of a material chosen from the group comprising porous concrete, timber concrete,
rubber concrete, rockwool, rockwool, steel, PVC, EPDM or a combination of a plurality of
these materials.
Each of these materials offers good acoustic and/or structural performance and can be used
to form one or more absorbent acoustic panels of an anti-noise installation according to the
invention.
The invention also relates to a guided transport track having a U-shaped cross section, in
particular in the form of a flared U, the two branches of which form the lateral walls of the
track and the central zone of which, connecting the tWo branches, forms a runway for a
guided transport vehicle, characterised in that it comprises an anti-noise installation
according to the invention.
The invention also relates to an anti-noise installation and a track equipped with an antinoise
installation, characterised in combination by all or some of the features mentioned
above or below.
5. List of figures
Other aims, features and advantages of the invention will become apparent from reading the
following description given solely by way of non-limitative example and which refers to the
accompanying figures, in which:
-Fig. 1 is a schematic perspective view of a guided transport track according to an
embodiment, equipped with an anti-noise installation according to an embodiment of the
invention;
- Fig. 2 is a schematic cross-sectional view of Fig. 1;
- Fig. 3 is a .schematic perspective view of a guided transport track equipped with an antinoise
installation according to an embodiment of the invention;
-Fig. 4 is a schematic cross-sectional view of Fig. 3;
- Fig. 5 is a schematic cross-sectional view of a guided transport track equipped with an antinoise
installation according to an embodiment of the invention, in which caps and bottom
screens are shown;
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- Fig. 6 is a schematic cross-sectional view of a guided transport track equipped with an antinoise
installation according to an embodiment of the invention, in which lateral mats are
shown;
- Fig. 7 is a schematic cross-sectional view of a guided transport track equipped with an antinoise
installation according to an embodiment of the invention, in which a central panel is
shown;
- Fig. 8 is a schematic cross-sectional view of a guided transport track equipped with an antinoise
installation according to an embodiment of the invention, in which caps, lateral panels,
a central panel and bottom screens are shown;
- Fig. 9 is a schematic cross-sectional view of a guided transport track equipped with an antinoise
installation according to an embodiment of the invention, in which absorbent slabs are
shown;
- Fig. 10 is a schematic cross-sectional view of a guided transport track equipped with an
anti-noise installation according to an embodiment of the invention, in which lateral panels,
bottom screens and a central panel are shown;
- Fig. 11 is a schematic cross-sectional view of a guided transport track equipped with an
anti-noise installation according to an embodiment of the invention, in which caps, lateral
panels, bottom screens and a central panel are shown.
6. Detailed description of an embodiment of the invention
In the figures, the scales and proportions are not strictly respected tor purposes of illustration
and clarity. Throughout the following detailed description given with reference to the figures,
unless otherwise indicated, each element of the anti-noise installation is described as it is
arranged when the installation is mounted on a guided transport track. This arrangement is
in particular shown in Fig. 2 and 4.
A guided transport track according to the invention intended to be equipped with an antinoise
installation according to the invention has a cross section in the shape of a U, the two
branches of which form the lateral walls 15, 16 of the track and the central zone of which,
connecting the two branches, forms runways 17, 18 tor a guided transport vehicle 50. In the
figures, the guided transport track is a track comprising two adjacent runways 17, 18 so that
two vehicles can pass each other.
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Throughout the remainder of the detailed description, only the anti-noise installation
arranged in relation to the runway 18 will be described precisely, it being understood that the
anti-noise installation may be symmetrical and have an identical design in relation to the
runway 17.
The anti-noise installation according to the invention comprises a plurality of acoustic panels
arranged relative to one another so as to form at least one chamber 20 for confining the
noise resulting from the passage of a vehicle over a runw11y 18. This confinement chamber
20 is shown schematically by a dashed line in Fig. 2. The chamber 20 surrounds the noisegenerating
zone that is formed by the wheels 51 of the vehicle 50 and the rails 52 carried by
the runway 18. This chamber 20 extends in the noise-formation zone as far as the free end
of at least one lateral wall 16 of the track.
According to the embodiment in the figures, the acoustic panels are all absorbent panels.
This being the case, according to other embodiments, one or the other of the absorbent
panels described below may be replaced by a blocking panel.
An anti-noise installation according to the embodiment in the figures therefore comprises a
plurality of absorbent panels and in particular:
-caps 30, 31 mounted on the free end of the lateral walls 15, 16, respectively, in parallel with
the runways, extending in the direction of the opposite lateral walls;
- lateral panels 32, 33 mounted perpendicularly to the runways in the vicinity of each lateral
wall 15, 16, respectively;
-a plurality of absorbent slabs 34 arranged on the runways 17, 18;
-a central panel 35 attached to the track between the two runways 17, 18, extending
perpendicularly to the runways;
- a skirt 36a, 36b carried by the vehicle 50 perpendicularly to the runway 17;
- bottom screens 37a, 37b mounted on the runway 17 facing the skirts 36a, 36b;
- lateral mats 38, 39 arranged on the lateral walls 15, 16, respectively, of the track.
The invention makes it possible to form one or more noise-confinement chambers by using
at least some of these various absorbent panels and arranging said panels relative to one
another.
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To do this, the invention aims to form at least one lateral partition for preventing noise from
propagating laterally towards the end of the viaduct, and a top partition lor preventing the
propagation of noise outside the viaduct.
Fig. 1 and 2 show a design of an anti-noise installation according to the invention, in which
only a central panel35, absorbent slabs 34, caps 30, 31 and mats 38, 39 are used to form a
noise-confinement chamber 20.
Fig. 3 and 4 show another design in which skirts 36a, 36b; bottom screens 37a, 37b, lateral
panels 32, 33 and a central panel 35 are used to form a first noise-confinement chamber 22
and a second chamber 21 into which the chamber 22 leads. This design affords a
substantial reduction in the noise by arranging two noise-confinement chambers 21, 22 in
series.
Hereinafter, various embodiments of each absorbent panel will be described in relation to
Fig. 5 to 11.
In Fig. 5, only caps 30, 31 and bottom screens 37a, 37b are shown for purposes of
illustration and clarity. The caps are formed according to this embodiment from porous
concrete and may be crenelated on the bottom part 60 oriented towards the runway 1 7 so as
to increase the absorbent surface area. According to other embodiments, the caps may be
formed of extruded EPDM, or from folded sheet metal having a thickness of, for example,
0.8mm.
Whatever the material used, each cap has holes 61 extending in parallel with the runway
and suitable for receiving attachment means of the screw-and-nut type. According to an
advantageous embodiment, each cap has a top surface having a slight slope, for example of
approximately 3 %, towards the runway, for allowing rainwater to run off.
The caps extend over a distance of, for example, 10 to 20 em from the edge of the lateral
wall on which they are mounted and extend along the track over a distance of, for example,
6 m.
Fig. 5 also shows bottom screens 37a, 37b intended to form, together with the skirts 36a,
36b, not shown in Fig. 5, at least one lateral wall of a noise-confinement chamber. The
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bottom screens 37a, 37b of the embodiment in Fig. 5 have a structure identical to that of the
caps 30, 31 described in relation to Fig. 4.
In Fig. 6, only one lateral mat 39 is shown in detail for purposes of illustration and clarity. It
is, for example, formed of timber concrete or rubber concrete and is applied directly against
the lateral wall 16 of the viaduct. According to the embodiment in Fig. 6, the mat 39 also
carries a rack 64 pegged directly in the concrete of the viaduct. This rack 64 is intended to
carry electric cables used for the functioning of the guided transport and/or for the viaduct. In
this case, the mat 39 may be held against the lateral wall by means of the attachment means
of the rack 64. According to another embodiment, the lateral mat is directly attached to the
lateral wall by attachment means of the nails-for-insulation type. The lateral mat 39 may be
crenelated in order to maximise the absorbent surface area.
In Fig. 7, only one central panel 35 is shown in detail for purposes of illustration and clarity. It
is, for example, formed by two panels made from porous concrete or timber concrete. It may
further comprise an H-shaped steel profile that covers the edges of the two panels and thus
mechanically holds these panels in place. The panel further comprises two plates welded to
each longitudinal end of the central panel so as to allow attachment of the panel to the
runway.
In Fig. 8, in addition to a central panel 35, a lateral panel 33, a bottom screen 37a and a cap
31 according to another embodiment of the invention are shown. The lateral panel 33 is a
timber concrete panel surrounded by a protective metal sheet. The cap 31 is a cap made
from timber concrete surrounded by a protective metal sheet. The bottom screen is made
from timber concrete surrounded by a protective metal sheet. The protective metal sheet is,
for example, a sheet 1.5 mm thick and the timber concrete has a thickness of, for example,
133 mm. Naturally, according to other embodiments, the thicknesses and materials may be
chosen differently without calling into question the subject matter of the invention.
In Fig. 9, only absorbent slabs 34 are shown. These slabs form the bottom partitions of the
confinement chambers. In Fig. 8, three types of slab are shown: an absorbent slab 34a
made from rubber concrete or porous concrete, a first slab 34b in two parts for following the
drainage slope of the track, and a second slab 34c in two parts for following the drainage
slope of the track in the central zone of the track.
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In Fig. 10, the central panel 35, the lateral panels 32, 33 and the bottom screens 37a are
formed of PVC and rockwool. Panels of this kind are, for example, formed by two heatwelded
PVC half-shells that surround the rockwool. For example, the rockwool is 10 em thick
and the half-shells have a thickness of a few mm. The half-shells are also perforated every
20 mm, each hole having a diameter of 10 mm. Naturally, according to other embodiments,
the thickness of the materials and the frequency and size of the perforations may be
different.
In Fig. 11, the central panel 35, the lateral panels 32, 33, the bottom screens 37a and the
caps 30, 31 are formed of perforated sheet metal and rockwool. The perforated metal sheet
has a thickness of, for example, 0.6 mm and the rockwool a thickness of 10 em. Panels of
this kind are, for example, formed by two heat-welded PVC half-shells.
The invention is not limited solely to the embodiments described. In particular, other types of
material may be used to form the acoustic panels, in particular the absorbent panels.

CLAIMS
1. Guided transport track having a U-shaped cross section, the two branches of which
form the lateral walls (15, 16) of the track and the central zone of which, connecting the two
branches, forms at least one runway (17, 18) for a guided transport vehicle (50), the
transport track comprising anti-noise installation comprising a plurality of acoustic panels
(30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) arranged relative to one another so as to
form at least one chamber (20, 21, 22) for confining a source of noise resulting from the
passage of a vehicle (50) on said at least one runway (17., 18), which chamber can be
provided around said noise source while extending as far as a free end of at least one
branch of the U, each acoustic panel (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39)
forming at least one portion of a partition of the noise-confinement chamber (20, 21, 22),
characterised in that said panels (30, 31, 34, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) are
removable and the installation comprises removable attachment means that are designed so
as to allow easy installation/removal of each panel.
2. Transport track according to claim 1, characterised in that the installation comprises
at least one acoustic panel, referred to as a cap (30, 31), suitable for being mounted on the
free end of at least one branch of the U, in parallel with each runway (17, 18), extending in
the direction of the branch of the U facing the branch on which it is mounted, so as to form a
top partition of a noise-confinement chamber.
3. Transport track according to either claim 1 or claim 2, characterised in that the
installation comprises at least one acoustic panel, referred to as a skirt (36a, 36b), suitable
for being carried by said vehicle (50) perpendicularly to each runway (17, 18), and at least
one acoustic panel, referred to as a bottom screen (37a, 37b), suitable for being mounted on
a runway (17, 18) facing said skirt (36a, 36b), so as form lateral partitions of at least one
noise-confinement chamber (22).
4. Transport track according to any of claims 1 to 3, characterised in that the installation
comprises at least one acoustic panel, referred to as a lateral panel (32, 33), suitable for
being mounted in the vicinity of a lateral wall (15, 16) of the track, perpendicularly to each
runway (17, 18), so as to form a lateral partition of at least one noise-confinement chamber
(21).
5. Transport track according to any of claims 1 to 4, characterised in that the installation
comprises at least one acoustic panel, referred to as a lateral mat (38, 39), suitable for being
attached to the lateral wall (15, 16) of the track, forming aU-shaped branch, so as to form a
lateral partition of at least one noise-confinement chamber (20).
6. Transport track according to any of claims 1 to 5, characterised in that the installation
comprises at least one acoustic panel, referred to as an absorbent slab (34a, 34b, 34c),
suitable for being attached to a runway (17, 18) so as to form a bottom partition of at least
one noise-confinement chamber (20).
7. Transport track according to any of claims 1 to 6, characterised in that said acoustic
panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) are suitable for being arranged in
various distinct configurations so as to form at least one noise-confinement chamber that is
compatible with the design of said guided transport track on which the installation is
mounted.
8. Transport track according to any of claims 2 to 7, characterised in that said acoustic
panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) are arranged relative to one
another so as to form at least two noise-confinement chambers (21, 22) that can be provided
in series between the noise source and a free end of at least one branch of the U.
9. Transport track according to any of claims 1 to 8 for a guided transport track
comprising two adjacent runways (17, 18), characterised in that the installation comprises at
least one acoustic panel, referred to as a central pane! (35), suitable for being attached to
the track between the two runways (17, 18) while extending perpendicularly to the runways
so as to form a lateral partition of at least one noise~confinement chamber (20).
10. Transport track according to any of claims 1 to 9, characterised in that each acoustic
panel is either an absorbent panel or a blocking panel.
11. Transport track according to claim 10, characterised in that at least one absorbent
panel is formed of a material chosen from the group comprising porous concrete, timber
concrete, rubber concrete, rockwool, glass wool, steel, PVC, EPDM or a combination of a
plurality of these materials.
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ABSTRACT
ANTI-NOISE INSTALLATION FOR GUIDED TRANSPORT TRACK AND GUIDED
TRANSPORT TRACK EQUIPPED WITH SUCH AN INSTALLATION
The invention relates to anti-noise installation for a guided transport track having a U-shaped
cross section, the two branches of which form the lateral walls (15, 16} of the track and the
central zone of which, connecting the two branches, forms' at least one runway (18) for a
guided transport vehicle (50), characterised in that said installation comprises a plurality of
acoustic panels (30, 31, 34, 35, 38, 39) arranged relative to one another so as to form at
least one chamber (20} for confining the noise resulting from the passage of a vehicle (50)
over at least one runway (18), which chamber can be provided around said noise source
while extending as far as a free end of at least one branch of the U, each panel (30, 31, 34,
35, 38, 39} forming at least one portion of a partition of a noise-confinement chamber (20).
Figure for the abstract: Fig. 2
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CLAIMS
1. Guided transport track having aU-shaped cross section, the two branches of which
form the lateral walls ( 15, 16) of the track and the central zone of which, connecting the two
branches, forms at least one runway (17, 18) for a guided transport vehicle (50), the
transport track comprising anti"noise installation comprising a plurality of acoustic panels
(30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) arranged relative to one another so as to
form at least one chamber (20, 21, 22) for confining a so.urce of noise resulting from the
passage of a vehicle (50) on said at least one runway (17, 18), which chamber can be
provided around said noise source while extending as far as a free end of at least one
branch of the U, each acoustic panel (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39)
forming at least one portion of a partition of the noise-confinement chamber (20, 21, 22),
characterised in that said panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) are
removable and the installation comprises removable attachment means that are designed so
as to allow easy installation/removal of each panel.
2. Transport track according to claim 1 , characterised in that the installation it-comprises
at least one acoustic panel, referred to as a cap (30, 31), suitable for being mounted on the
free end of at least one branch of the U, in parallel with each runway (17, 18), extending in
the direction of the branch of the U facing the branch on which it is mounted, so as to form a
top partition of a noise-confinement chamber.
3. Transport track according to either claim 1 or claim 2, characterised in that the
installation it-comprises at least one acoustic panel, referred to as a skirt (36a, 36b), suitable
for being carried by said vehicle (50) perpendicularly to each runway (17, 18), and at least
one acoustic panel, referred to as a bottom screen (37a, 37b), suitable for being mounted on
a runway (17, 18) facing said skirt (36a, 36b), so as form lateral partitions of at least one
noise-confinement chamber (22).
4. Transport track according to any of claims 1 to 3, characterised in that the installation
it.comprises at least one acoustic panel, referred to as a lateral panel (32, 33), suitable for
being mounted in the vicinity of a lateral wall (15, 16) of the track, perpendicularly to each
runway (17, 18), so as to form a lateral partition of at least one noise-confinement chamber
(21).
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5. Transport track according to any of claims 1 to 4, characterised in that the inst?llatioo.
it.comprises at least one acoustic panel, referred to as a lateral mat (38, 39}, suitable for
being attached to the lateral wall (15, 16) of the track, forming a U-shaped branch, so as to
form a lateral partition of at least one noise-confinement chamber (20).
6. Transport track according to any of claims 1 to 5, characterised in that the installation
it-comprises at least one acoustic panel, referred to as an absorbent slab (34a, 34b, 34c),
suitable for being attached to a runway (17, 18) so as toJorm a bottom partition of at least
one noise-confinement chamber (20).
7. Transport track according to any of claims 1 to 6, characterised in that said acoustic
panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) are suitable for being arranged in
various distinct configurations so as to form at least one noise-confinement chamber that is
compatible with the design of said guided transport track on which the installation is
mounted.
8. Transport track according to any of claims 2 to 7, characterised in that said acoustic
panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) are arranged relative to one
another so as to form at least two noise-confinement chambers (21, 22) that can be provided
in series between the noise source and a free end of at least one branch of the U.
9. Transport track according to any of claims 1 to 8 for a guided transport track
comprising two adjacent runways (17, 18), characterised in that the installation it-comprises
at least one acoustic panel, referred to as a central panel (35), suitable for being attached to
the track between the two runways (17, 18) while extending perpendicularly to the runways
so as to form a lateral partition of at least one noise-confinement chamber (20).
10. Transport track according to any of claims 1 to 9, characterised in that each acoustic
panel is either an absorbent panel or a blocking panel.
11. Transport track according to claim 10, characterised in that at least one absorbent
panel is formed of a material chosen from the group comprising porous concrete, timber
concrete, rubber concrete, rockwool, glass wool, steel, PVC, EPDM or a combination of a
plurality of these materials.