WO2016038270A1

WO2016038270A1 - Anti-noise facility for tracked transport road and tracked transport road provided with such a facility

Info

Publication number: WO2016038270A1
Application number: PCT/FR2015/052240
Authority: WO
Inventors: Emilie CLAVIER; Claire LAPASSAT; Eric AUGIS; Ivan WOUTS
Original assignee: Systra
Priority date: 2014-09-10
Filing date: 2015-08-20
Publication date: 2016-03-17
Also published as: PH12017500390A1; GB201702894D0; GB2544432A; JP2017531110A; FR3025533B1; SE1750197A1; CN106795697A; AU2015314080A1; KR20170049507A; CA2959108A1; FR3025533A1; HK1232267A1; US20170275834A1

Abstract

The invention relates to an anti-noise facility for a tracked transport road having a U-shaped straight cross-section in which the two arms form the side walls (15, 16) of the road and in which the central area connecting the two arms forms at least one running track (18) for a tracked transport vehicle (50), characterised in that it comprises a plurality of acoustic panels (30, 31, 34, 35, 38, 39) arranged relative to one another such as to form at least one chamber (20) for enclosing the noise resulting from the vehicle (50) passing over at least one running track (18), which can be arranged around said noise source, extending until a free end of at least one arm of the U, each panel (30, 31, 34, 35, 38, 39) forming at least one portion of a partition of a noise enclosure chamber (20).

Description

ANTI-NOISE INSTALLATION FOR A GUIDED TRANSPORT ROAD AND GUIDED TRANSPORT ROAD EQUIPPED WITH SUCH

INSTALLATION

1. Technical field of the invention

The invention relates to an anti-noise device for a guided transport route, in particular for a viaduct having a transverse U-shaped cross section. The invention also relates to a guided transport route, and in particular to a viaduct, equipped with a installation according to the invention. 2. Technological background

Public guided transports such as metros and trains generate significant noise levels, which result in particular from the interactions between the wheels of the transport vehicles and the running tracks such as rails on which these vehicles travel.

This problem of noise is particularly troublesome when the lanes are developed in urban agglomerations, in the immediate vicinity of residential areas, particularly in the context of viaducts or airways.

One of the technical solutions commonly used on this type of road is the installation of acoustic barriers two to three meters high that come to border the way so as to trap the noise and limit its spread beyond the immediate vicinity. These barriers make it possible to counter the propagation of sound by reflection of the acoustic waves that reach the inner face of the barrier

This solution has several disadvantages among which the fact of obstructing the field of view of residents because of the presence of particularly large acoustic barriers.

In addition to the visual impact, the acoustic barriers are ineffective and even aggravate the noise situation for residents living in buildings located high up in relation to the viaduct, due to multiple reflections on the boxes or screens located on the opposite lane. In addition, this solution is bulky, has a significant wind load, which has a significant impact on the constraints subject to the structure, and leads to weigh down the structure on which it is implemented. Also, it is possible to equip with such noise barriers, that the structures, especially viaducts, which were oversized during their construction. Only oversized viaducts can later accept new constraints and therefore be equipped with these noise barriers. The other works are condemned to be noisy and thus to penalize the residents and / or to make the surrounding areas not very conducive to housing.

Finally, the solution of noise barriers along the tracks does not allow, once the barriers installed along the track, to change the level of performance, except to replace the noise barriers with new barriers.

There is therefore a need for a new solution to limit the noise caused by the passage of guided transport vehicles on bridges viaduct type structures.

There is also a need for a solution to adapt to all types of viaducts, especially viaducts that were not oversized during their construction.

There is also a need to have a solution to provide different levels of performance according to the needs expressed by residents.

3. Objectives of the invention

The aim of the invention is to overcome at least some of the disadvantages of the known solutions for limiting the noise heard by the residents of bridges, viaducts or bridge structures, in particular viaducts having a U-shaped cross section, particularly in flared U shape.

In particular, the invention aims to provide a viaduct anti-noise installation that does not impact the visual field of residents.

The invention also aims to provide, in at least one embodiment, an anti-noise installation that allows adaptation without major difficulties to different configurations of viaducts.

The invention also aims to provide, in at least one embodiment of the invention, an anti-noise installation which has easy maintenance.

The invention also aims to provide, in at least one embodiment of the invention, an installation that can respond to different levels of performance.

The invention also aims to provide, in at least one embodiment, a viaduct equipped with an anti-noise installation according to the invention.

4. Presentation of the invention

To this end, the invention relates to a soundproofing device for a guided transport path having a U-shaped transverse cross-section - in particular in the form of U flare - whose two branches form the side walls of the track and whose central zone connecting the two branches forms at least one running track of a guided transport vehicle, characterized in that it comprises a plurality of acoustic panels arranged relative to one another so as to form at least one chamber of enclosing a source of noise resulting from the passage of a vehicle on said running track, which can be arranged around said source of noise by extending to a free end of at least one branch of the U, each panel acoustically forming at least a portion of a partition of a noise enclosure chamber.

The invention thus makes it possible to form at least one enclosure chamber of the noise arranged around the source of the noise - which results from the passage of the wheels of a vehicle on the running track, for example, the wheels of a train on the rails -and the free end of the side walls of the U-shaped viaduct. A noise enclosing chamber is a chamber that has partitions adapted to best isolate the space containing the noise sources of the space downstream and so attenuate the noise. The invention proposes to encapsulate the sources of noise resulting from the dynamic interaction of the wheels of a vehicle with the running track by using the space available between these sources and the side walls of the U-shaped viaduct. The space being reduced, the invention proposes to use a plurality of acoustic panels and to arrange them with respect to one another so as to form different partitions of at least one noise enclosing chamber, without however extending beyond the outer viaduct jig to limit the visual impact of the installation.

The invention utilizes and optimizes the shape of the U-shaped viaduct by forming a noise enclosing chamber that extends entirely into the authorized space between the noise source and the free end of the U-branches. In other words, each portion of the U-shaped viaduct is used to reduce noise emissions. The invention therefore takes advantage of the specific shape of the viaduct to reduce noise emissions by incorporating different acoustic panels.

In addition, the enclosure chamber is arranged around the source of the noise extending to the free end of the side walls. In other words, the acoustic panels do not extend beyond the viaduct. In particular, no acoustic panel protrudes from the free end of the side walls. The set of acoustic panels is formed between the side walls of the viaduct. The visual impact of an anti-noise installation is therefore zero for residents. A viaduct which has a neat architecture, aesthetic curves, is not penalized by the arrangement of an anti-noise installation according to the invention, unlike noise barriers of the prior art.

According to the invention, the enclosing chamber is formed by the arrangement of a plurality of acoustic panels, each panel forming at least a portion of a partition of an enclosure chamber. It is therefore particularly easy to adapt the shape and dimensions of the noise enclosing chambers to the size of the vehicles traveling 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 the noise enclosure chambers to the desired level of performance. For example, an installation according to the invention makes it possible to adapt the sound attenuation produced to a specific request by modifying the shape of the enclosing chamber produced by the arrangement of the acoustic panels. The performance can also be determined by the type of acoustic panels used. In addition, depending on the size of the vehicle traveling on the track, only certain acoustic panels of the plurality of acoustic panels can be used.

The enclosure 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 to form partitions where the vehicle and the viaduct do not form walls that prevent the propagation of noise.

Advantageously and according to the invention, each acoustic panel is either an absorbent panel or a shutter panel. An absorbent panel is an acoustic panel having a material adapted to absorb at least a portion of the noise that reaches it. A shutter panel is an acoustic panel formed of a material adapted to block the propagation of acoustic waves that reach it.

Advantageously, an installation according to the invention comprises at least one acoustic panel, called a cap, adapted to be mounted on the free end of at least one branch of the U, parallel to said rolling track, extending in the direction of the branch of the U opposite the branch on which it is mounted, so as to form an upper partition of a noise enclosure chamber.

Each cap forms an upper partition of at least one noise enclosure chamber. Each cap is arranged at the end of a side wall of the track towards the side wall of the facing track, parallel to the raceway. 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 generate visual impact for residents. Each cap forms with the side 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 the residents of the viaduct during the passage of vehicles on the road. transport way. The cap may have dimensions to extend closer to the vehicle traveling on the track to minimize 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, called skirt, adapted to be carried by said vehicle perpendicularly to said raceway and at least one acoustic panel, said low screen, adapted to be mounted on said raceway facing said skirt, so as to form a sidewall of at least one chamber of the noise enclosure.

An anti-noise installation according to this variant thus makes it possible to form, by the combination of a skirt carried by the vehicle and a low screen mounted on the running track, a side wall of a point noise enclosing chamber. mobile with the movement of the vehicle. In particular, the chamber is formed only when the train is present on the viaduct. This side wall is not continuous, but has a gap between the skirt and the low screen to allow the vehicle to flow on the track. This gap between the bottom screen and the skirt determines the leakage surface to the outside of the cribbing chamber to which the formed partition belongs. This surface can therefore be parameterized by adapting the dimensions of the skirt and the low screen to the size of the vehicles traveling on the track.

Preferably, the installation comprises two skirts carried laterally on each side of the vehicle and a low screen mounted on the track facing each skirt.

Advantageously, an anti-noise installation according to the invention comprises at least one acoustic panel, said side panel, adapted to be mounted in the vicinity of a side wall of the track, perpendicular to the raceway, so as to form a partition side of at least one noise enclosure chamber.

Alternatively or in combination, the installation comprises at least one acoustic panel, said side mat, adapted to be fixed on the side wall of the channel forming a U branch so as to form a side wall of at least one chamber of enclosure of noise.

A side mat can match the shape of the side wall of the U-shaped channel to form a side wall of a noise enclosure chamber.

Advantageously, an anti-noise installation comprises at least one acoustic panel, said slab, adapted to be fixed on the raceway so as to form a lower partition of at least one noise enclosure chamber.

Advantageously and according to the invention, said acoustic panels - in particular the absorbent panels - are adapted to be arranged in different different configurations so as to form at least one enclosure chamber compatible with the configuration of said transport route guided on which installation is implemented.

An installation according to this variant makes it possible to adapt the configuration of the enclosing chambers formed by the arrangement of the acoustic panels - in particular the absorbent panels - to different types of track, to the constraints and specific needs of each track.

Advantageously, an installation according to the invention further comprises means for removably attaching said acoustic panels - in particular absorbent panels - so as to allow easy assembly / disassembly of each acoustic panel - in particular of each absorbent panel -.

According to this variant, the assembly and disassembly of an acoustic panel on the track or on the vehicle is carried out by means of removable fixing means, which facilitates the maintenance of an anti-noise installation according to the invention and which makes it possible to easily adapt the configuration of the chambers formed by the acoustic panels to the size of the vehicles traveling on the track. These removable fastening means comprise for example means of the screw-nut type.

Advantageously and according to the invention, said acoustic panels are arranged with respect to each other so as to form at least two noise enclosing chambers that can be arranged in series between the source of noise and a free end of at least one branch of U.

According to this variant, the installation forms at least two noise enclosing chambers arranged in series between the noise source and the outside of the viaduct. In particular, the first cribbing chamber opens into the second cribbing chamber which opens on the outside of the viaduct, at the level of the cap. The first chamber comprises for example a lower wall formed of slabs, side walls formed by skirts and low screens, and an upper partition formed by the vehicle. The second cribbing chamber comprises for example a lower partition formed by slabs, lateral partitions respectively formed by a skirt and a low screen (this partition is common with the first chamber), and by a side mat, and an upper partition. formed by a cap. The space between the skirt and the 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 trailing surface of the second chamber.

An anti-noise installation according to the invention may be used in connection with a guided transport path comprising two adjacent raceways. In this case, the anti-noise installation advantageously comprises at least one acoustic panel, said central panel, adapted to be fixed on the track between the two raceways extending perpendicularly to the raceways so as to form a partition side of at least one enclosure chamber of the noise.

Advantageously and according to the invention, at least one absorbent acoustic panel is formed in a material chosen from the group comprising porous concrete, wood concrete, rubber concrete, rock wool, rockwool, stone wool, Steel, PVC, EDPM, or a combination of several of these materials.

Each of these materials provides good acoustic and / or structural performance and can be used to form one or more of the acoustic absorbent panels of a noise suppression system according to the invention.

The invention also relates to a guided transport path having a U-shaped transverse cross-section - particularly U-shaped flared - whose two branches form the side walls of the track and whose central zone connecting the two branches forms a runway of a vehicle of guided transport, characterized 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 anti-noise system characterized in combination by all or some of the characteristics mentioned above or below.

5. List of figures

Other objects, features and advantages of the invention will become apparent on reading the following description given solely by way of non-limiting example and which refers to the appended figures in which:

FIG. 1 is a schematic perspective view of a guided transport path according to an embodiment equipped with an anti-noise installation according to one embodiment of the invention,

FIG. 2 is a diagrammatic cross-sectional view of FIG. 1;

FIG. 3 is a schematic perspective view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention,

FIG. 4 is a diagrammatic cross-sectional view of FIG. 3;

FIG. 5 is a schematic sectional view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention on which caps and low screens are represented,

FIG. 6 is a schematic sectional view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention on which side mats are represented,

FIG. 7 is a schematic sectional view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention on which a central panel is represent,

FIG. 8 is a diagrammatic sectional view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention on which caps, side panels, a central panel and low screens. are represented,

FIG. 9 is a schematic sectional view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention on which absorbent slabs are represented,

FIG. 10 is a schematic sectional view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention on which side panels, bottom screens and a central panel are represented,

FIG. 11 is a schematic sectional view of a guided transport path equipped with an anti-noise installation according to one embodiment of the invention on which caps, side panels, low screens and a central panel. are represented. 6. Detailed description of an embodiment of the invention

Figures, scales and proportions are not strictly adhered to for the purpose of illustration and clarity. Throughout the detailed description which follows with reference to the figures, unless otherwise indicated, each element of the anti-noise facility is described as it is arranged when the installation is mounted on a guided transport path. This arrangement is shown in particular in FIGS. 2 and 4.

A guided transport path according to the invention intended to be equipped by an anti-noise installation according to the invention has a U-shaped transverse cross-section whose two branches form the side walls 15, 16 of the track and whose zone central linking the two branches forms tracks 17, 18 of a guided transport vehicle 50. In the figures, the guided transport path is a track comprising two adjacent runways 17, 18 so that two vehicles can cross each other.

Throughout the rest of the detailed description, only the anti-noise installation arranged in connection with the raceway 18 will be precisely described, it being understood that the anti-noise installation may be symmetrical and have an identical configuration in connection with the track 17 rolling.

The anti-noise device 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 enclosing the noise resulting from the passage of a vehicle on a track 18 . This enclosing chamber 20 is schematically represented in dashed lines in FIG. 2. The chamber 20 surrounds the noise generation zone which is formed by the wheels 51 of the vehicle 50 and the rails 52 carried by the raceway 18. This chamber 20 extends between the zone of noise formation up to the free end of at least one side wall 16 of the channel.

According to the embodiment of the figures, the acoustic panels are all absorbent panels. However, in other embodiments, either of the absorbent panels described hereinafter may be replaced by a shutter panel.

An anti-noise installation according to the embodiment of the figures thus comprises a plurality of absorbent panels and in particular:

caps 30, 31 respectively mounted on the free end of the side walls 15, 16, parallel to the rolling tracks, extending towards the opposite side walls,

side panels 32, 33 mounted perpendicularly to the rolling tracks in the vicinity of each lateral wall 15, 16 respectively;

a plurality of absorbent slabs 34 arranged on the running tracks 17, 18,

a central panel fixed on the track between the two tracks 17, 18 running perpendicular to the running tracks,

a skirt 36a, 36b carried by the vehicle 50 perpendicular to the runway 17,

bottom screens 37a, 37b mounted on the track 17 facing the skirts 36a, 36b,

- Carpet 38, 39 side respectively arranged on the walls 15, 16 side of the track.

The invention makes it possible to form one or more noise enclosing chambers by the use of at least a part of these different absorbent panels and their arrangement relative to one another.

To do this, the invention aims to form at least one side wall to prevent the propagation of noise laterally to the end of the viaduct, and an upper partition to prevent sound propagation outside the viaduct.

FIGS. 1 and 2 show a configuration of an anti-noise installation according to the invention in which only a central panel 35, absorbent slabs 34, caps 30, 31 and mats 38, 39 are used to form a chamber 20 of noise enclosure.

FIGS. 3 and 4 show another configuration in which skirts 36a, 36b, bottom screens 37a, 37b, side panels 32, 33 and a central panel 35 are used to form a first chamber 22 for enclosing noise. and a second chamber 21 in which the chamber 22 opens. This configuration allows a substantial reduction of noise by the series arrangement of two chambers 21, 22 of noise enclosure.

In the following, various embodiments of each absorbent panel will be described in connection with Figures 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 of porous concrete and can be crenellated on the lower portion 60 facing the runway 17 so as to increase the absorbent surface. According to other embodiments, the caps can be formed of extruded EPDM, folded sheet having for example a thickness of 0.8mm.

Whatever the material used, each cap has orifices 61 extending parallel to the raceway and adapted to receive fastening means of the screw-nut type. According to an advantageous embodiment, each cap has an upper surface slightly inclined, for example of the order of 3%, to the raceway, to allow the flow of rainwater.

The caps extend for example a distance of 10 to 20 cm from the edge of the side wall on which they are mounted and run along the track over a distance, for example 6 m.

Figure 5 also shows bottom screens 37a, 37b for forming with skirts 36a, 36b, not shown in Figure 5, at least one side wall of a noise enclosure chamber. The bottom screens 37a, 37b of the embodiment of FIG. 5 have a structure identical to the caps 30,

31 described in connection with Figure 4.

In Fig. 6, only a side mat 39 is shown in detail for purposes of illustration and clarity. It is for example formed of concrete wood or rubber concrete and is applied directly against the side wall 16 of the viaduct. According to the embodiment of FIG. 6, the belt 39 also carries a rack 64 pegged directly into the concrete of the viaduct. This rack 64 is intended to carry electrical cables useful for the operation of the guided transport and / or for the viaduct.

In this case, the belt 39 can be held against the side wall by means of the fixing means of the rack 64. According to another embodiment, the side mat is directly fixed to the side wall by means of fastening type nails for insulation. The side mat 39 can be crenellated to maximize the absorbent surface.

In Figure 7, only a central panel 35 is shown in detail for purposes of illustration and clarity. It is for example formed of two porous concrete panels or wood concrete. It may further comprise a H-shaped steel profile that covers the edges of the two panels and thus mechanically maintain these panels. The panel further comprises two plates welded to each longitudinal end of the central panel to allow the attachment of the panel to the raceway.

In FIG. 8, in addition to a central panel 35, there is shown a side panel 33, a bottom screen 37a and a cap 31 according to another embodiment of the invention. The side panel 33 is a wooden concrete panel surrounded by a protective sheet. The cap 31 is a wooden concrete cap surrounded by a protective sheet. The low screen is concrete wood surrounded by a protective sheet. The protective sheet is for example a sheet of 1.5 mm thick and the wood concrete has for example a thickness of 133 mm. Of course, according to other embodiments, the thicknesses and materials may be chosen differently without calling into question the object of the invention.

In Figure 9, only absorbent slabs 34 are shown. These slabs form the lower partitions of the enclosing rooms. In Figure 8, three types of slabs are shown: an absorbent slab 34a rubber concrete or porous concrete, a first slab 34b in two parts to follow the drainage slope of the track, and a second slab 34c in two parts for follow the drainage slope of the track at the central area of the track.

In FIG. 10, the central panel, the side panels 32, 33 and the bottom screens 37a are formed of PVC and rockwool. Such panels are for example formed of two heat-welded PVC half-shells which enclose rock wool. For example, rockwool is 10 cm thick and half-shells have a thickness of a few mm. The half-shells are further perforated every 20 mm, each hole having a diameter of 10 mm. Of course, according to other embodiments, the thickness of the materials, the frequency and the size of the perforations may have other values.

In FIG. 11, the central panel, the side panels 32, 33, the bottom screens 37a and the caps 30, 31 are formed of perforated sheet and rockwool. The perforated sheet has for example a thickness of 0.6 mm and the rockwool a thickness of 10 cm. Such panels are for example formed of two PVC half-shells heat-welded.

The invention is not limited to the embodiments described. In particular, other types of materials may be used to form acoustic panels - particularly absorbent panels -.

Claims

1. Anti-noise device for a guided conveyance having a U-shaped cross section whose two branches form the side walls (15, 16) of the track and the central zone connecting the two branches forms at least one track (17, 18) of a guided transport vehicle (50), characterized in that it comprises a plurality of panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) arranged in relation to one another so as to form at least one chamber (20, 21, 22) for enclosing a source of noise resulting from the passage of a vehicle (50) over at least one runway (17, 18) which may be arranged around said source of noise by extending to a free end of at least one branch of the U, each panel (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) forming at least a portion of a partition of a noise enclosure chamber (20, 21, 22).

2. Anti-noise device according to claim 1, characterized in that it comprises at least one acoustic panel, said cap (30, 31), adapted to be mounted on the free end of at least one branch of the U, parallel to each running track (17, 18), extending towards the branch of the U facing the branch on which it is mounted, so as to form an upper partition of a noise enclosure chamber .

3. Anti-noise device according to one of claims 1 or 2, characterized in that it comprises at least one acoustic panel, said skirt (36a, 36b) adapted to be carried by said vehicle (50) perpendicular to each running track (17, 18) and at least one acoustic panel, said low screen (37a, 37b) adapted to be mounted on a track (17, 18) rolling opposite said skirt (36a, 36b), to form side walls of at least one chamber (22) for enclosing noise.

4. Installation according to one of claims 1 to 3, characterized in that it comprises at least one acoustic panel, said panel (32, 33) side, adapted to be mounted in the vicinity of a wall (15, 16) lateral of the track, perpendicular to each running track (17, 18) so as to form a side wall of at least one noise enclosure chamber (21).

5. Anti-noise device according to one of claims 1 to 4, characterized in that it comprises at least one acoustic panel, said mat (38, 39) side, adapted to be fixed on the wall (15, 16) lateral section of the channel forming a branch of the U so as to form a lateral partition of at least one chamber (20) of noise enclosure.

6. Anti-noise device according to one of claims 1 to 5, characterized in that it comprises at least one acoustic panel, said absorbent pad (34a, 34b, 34c) adapted to be fixed on a track (17, 18) to form a lower partition of at least one noise enclosure chamber (20).

7. Anti-noise device according to one of claims 1 to 6, characterized in that said panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) acoustic are adapted to be arranged in different distinct configurations so as to form at least one noise enclosing chamber compatible with the configuration of said guided transport path on which the installation is mounted.

8. Anti-noise device according to one of claims 1 to 7, characterized in that it comprises means for removably fixing said acoustic panels so as to allow easy assembly / disassembly of each panel.

9. Anti-noise device according to one of claims 2 to 8, characterized in that said acoustic panels (30, 31, 32, 33, 34, 35, 36a, 36b, 37a, 37b, 38, 39) are arranged with respect to each other so as to form at least two noise enclosing chambers (21, 22) which can be arranged in series between the noise source and a free end of at least one branch of the U.

10. Anti-noise device according to one of claims 1 to 9 for a guided transport path comprising two adjacent running tracks (17, 18), characterized in that it comprises at least one acoustic panel, said panel (35). ), adapted to be fixed on the track between the two tracks (17, 18) of rolling extending perpendicularly to the raceways so as to form a sidewall of at least one chamber (20) for enclosing the noise.

11. Anti-noise device according to one of claims 1 to 10, characterized in that each acoustic panel is either an absorbent panel or a shutter panel.

12. Anti-noise device according to claim 11, characterized in that at least one absorbent panel is formed in a material selected from the group consisting of porous concrete, wood concrete, rubber concrete, rock wool, glass wool, steel, PVC, EDPM, or a combination of several of these materials.

13. A guided conveyance with a U-shaped transverse cross-section whose two branches form the side walls (15, 16) of the track and the central zone connecting the two branches forms a running track of a vehicle guided transport device, characterized in that it comprises an anti-noise device according to one of claims 1 to 12.