Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
  • E01B19/003—Means for reducing the development or propagation of noise
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
  • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
  • E01F8/0023—Details, e.g. foundations
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
  • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
  • E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
  • E01F8/0064—Perforated plate or mesh, e.g. as wall facing
  • E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material

Definitions

• the present invention relates to an acoustic shielding unit, its structure and an apparatus for carrying out the construction.
• CH-675738 discloses e.g. a noise shield equipped with a number of noise attenuating elements and spaced along the length of the noise shield with supports as support of the elements, the noise barrier comprising an air space on one side by the noise attenuating elements and on the other side by plate-like elements is limited.
• US-A-4095669 describes a noise control screen with noise damping elements, wherein the air space on the one side of the noise damping elements via air openings in contact with the environment.
• EP-A-0417049 describes a noise damping element constructed in the thickness of wood fiber cement.
• a sound absorbing mattress for covering walls along certain segments of heavy traffic roads or railway lines and for the protection of local residents.
• This has at least one cast plate of mineralized wood particles, which are pressed together by a binder.
• gabions for the production of a sound insulation wall consisting of a gabion basket with wire mesh winches and similar winches for filling with bulk material are known.
• a massive core in the shape of a thick plate consisting of a central barrier layer of concrete with mineral additives and two mutually formed outer layers of wood chip concrete with wood chips as aggregate.
• a Schallschutzgabione is known, which is composed of a wire mesh basket with side walls.
• WO 10/128937 discloses an acoustic shielding unit which has a frame and a noise absorber arranged thereon, this being configured as an exchangeable cassette. The shielding unit is embedded in the ground. That is, the construction requires to set up extensive earthworks. From DE 202011105513 U1 a component for low noise barriers along railway tracks is known.
• the concrete body consists of a vertical wall part and adjoining upper and lower wall parts. In this way, a chamber is formed, wherein at least on a wall part of an absorber mat and in the chamber a sound-absorbing filling of crushed stone is introduced. On the open, the sound-facing side wire mesh are available.
• Object of the present invention is therefore to provide an acoustic shielding available that can be set up without major earthworks, especially without letting it into the ground and is nevertheless sufficiently static stable.
• This object is achieved by an acoustic shielding unit comprising a sound-absorbing unit which is arranged on a standing surface, wherein
• the floor space is applied to a floor area without previous excavation
• At least one of the layers forms a bound carrier layer and at least one further layer, an unbonded leveling layer, and
• the bound carrier layer (s) is (are) arranged between the base surface and the leveling layer (s).
• the shielding unit according to the invention is constructed in such a way that the bonded carrier layer is arranged on a stand surface, the compensating layer on this and in turn the noise-insulating unit.
• the stand area is arranged on the floor surface.
• the base area here contains gravel grains, in particular coarse gravel, as reproduced in DIN 4022.
• preference is given to using materials having a particle size of 20-63 mm. Particularly preferred are 24-60 mm. It is very particularly preferred to compact track material and to use it as a stand area. That , the track bed material next to the tracks is used directly as a stand space
• the bonded layers are designed in such a way that the finer-grained material of the compensating layer arranged thereon does not get into the standing surface consisting of a larger-grained material or containing such a material.
• the bonded layers are preferably mats or lattices.
• nonwoven fabrics preferably nonwoven webs consisting of continuous filaments, may be considered.
• textile fabrics come into consideration, which are preferably for the Solid particles of the soil are essentially impermeable. In a variant of the invention, so-called spun nonwovens are used for this purpose.
• tissue can also be used in the further embodiment.
• Suitable materials for the textile fabrics are polyesters, polyamides or polyolefins.
• the unbonded leveling layer are preferably pourable materials into consideration, which are preferably finer-grained than the materials of the base.
• the unbonded leveling layer is made of or may contain such materials. By means of this leveling layer unevenness and depressions in standing and floor surfaces are compensated according to the invention. At the same time, a vertical and horizontal alignment of the shielding units is made possible.
• Granular materials such as gravel, gravel, grit, z. For example, materials having the average grain size of 2 to 32, 2 to 16, 2 to 8 and / or 2 to 4 mm may be considered.
• sound-insulating elements come in an alternative of the invention units with granulate beds into consideration. That There are so-called. Gabions are used, which contain carrier elements with noise-insulating units from a granular bed.
• the usable Suceiemente can consist of different materials. Preference is given to concrete, textile-reinforced concrete, fiber-reinforced concrete, reinforced concrete.
• lattice-shaped elements are also suitable. This is the so-called gabion technology. That These are basket-shaped elements in which granules are poured.
• the support elements have openings, which are preferably closable, so that an enclosed cavity is formed.
• the carrier material has at least one bottom surface and one top surface. Both surfaces are preferably designed horizontally and between the two is said cavity.
• the openings are preferably arranged in the top surface. After filling, the closure is carried out by means of suitable elements. If these are arranged in the top surface, it may be, for example, walkable gratings act. Likewise, however, any other closing elements, ie flap mechanisms, can be used.
• the openings for filling with the granules may also be arranged laterally.
• the closing mechanism is arranged vertically, i. in the form of a door-like designed element so that it can be opened for filling with granules.
• the carrier element is preferably composed of lattice-shaped elements. This results in a basket-shaped structure having bottom, top and side surfaces with openings for filling with granules.
• an element preferably in the form of a vertically configured wall, of solid material within the bed.
• This element may include concrete, textile concrete, reinforced concrete, fiber concrete and wood cement, etc. act.
• This element is preferably arranged so that it is substantially enclosed by the granular bed. However, complete enclosure is not required.
• a noise-insulating unit preferably a sound absorption mat, is arranged at the interface between solid material and granulated bed.
• a closure lid is provided in the grate-type grate cover, insofar as this is provided.
• appropriate devices such as eyelets, care can be taken that the filled gabion baskets can be moved.
• the respective lattice-shaped support elements have the advantage that they can be filled immediately and can be installed relatively easily. Superfluous earthworks are not required, but can on the prepared surface according to the invention unbound and bound layer carried an application of the units. On this they have a sufficiently stable state.
• recesses in the shielding unit for the arrangement of supply lines of all kinds. These recesses are preferably designed such that, for example, pipes or cables are pulled through. This makes it possible that, for example, in the arrangement along railway lines parallel to these cables and pipe shafts can be installed without additional earthworks.
• an element made of a non-lattice-shaped device is provided as the carrier element.
• a carrier element are primarily concrete, textile concrete, fiber concrete, reinforced concrete or cement with any admixtures into consideration.
• the support elements can be designed in such a way that a cavity enclosed by walls made of the materials mentioned is formed with at least one opening for filling with granules.
• the support member is positioned such that the opening is laterally oriented, i. that attached closure element has vertical direction. That It is inventively incorporated a door-like element, which is closable after filling the cavity with granules.
• closure element is preferably a lattice-shaped element, e.g. a grid mat, used. This can be made of metal, plastic or other suitable materials.
• the [heat-insulating unit, for example a sound-absorbing mat is arranged at the interface between the granules and the carrier element.
• the pipelines can also be arranged in the carrier element. But it is also possible to provide a recess in the granule layer. Again, it is the object of the invention to provide recesses, which make it possible, for example, when used on railway lines or roads along this traffic route to lay pipes or pipes. This will allow that they can be arranged without earthworks. Likewise, a maintenance without much effort in this construction is possible.
• the sound-absorbing unit are preferably sound-absorbing mats in question.
• prefabricated anti-noise elements can be used with particular preference. These have a structure that allows directly to concrete and the like. To attach material. That the anti-noise elements may have a structure that either prevents or minimizes the reflected sound. It is also possible to use steel plates with a special profile, e.g. a corrugated profile to use. Likewise, schailabsorb Schl masses can be used.
• the materials may be wood particles in a mineralized face layer consisting of reinforced cement boards.
• rubber granules can also be used for the noise-damping units. These can be integrated in a mat. Preferably, these are integrated in such a way that air-permeable pores or channels are formed. That These elements are to a certain extent permeable to sound and air.
• the shielding unit preferably has a height which corresponds to the height between the surface of the earth and approximately the lower edge of the railway wagon. With this technique it is achieved that the noise caused mainly by the rolling of the vehicles is absorbed. Experiments have shown that a noise reduction of 8 dB can be achieved. That is, the acoustic shielding units according to the invention in the form of very low noise barriers offer good noise reduction on roads and tracks. At the same time they provide a good view for the driver or the passenger. In addition, the construction costs are considerably lower than for a high noise barrier. The system according to the invention is also advantageous in comparison with the previous systems, because the material consumption is considerably lower.
• the space requirement is very small and superfluous earthworks are avoided because supply lines and cables no longer have to be laid in the ground.
• the shielding units as such are on the ground, without significant earthworks must be performed.
• it can be achieved by the arrangement of the supply lines and cables that maintenance is facilitated. Repairs are possible without major intervention.
• the design is so simple that significant cost savings are possible during installation. Due to the low heights of 55 to 120 cm above the rail, flexible use in various areas is possible.
• the gabion baskets, if used, are also easily displaceable.
• the advantage is also due to the fact that passages for small animals can be created. That Here, too, the possibility is created for animals to pass through the respective sound insulation walls. That is, in a further embodiment of the invention, the shielding units also have openings through which pine animals can pass from one side of the element to the other side.
• treads and climbing aids By arranging treads and climbing aids (passing help), the accessibility of the shielding units can be facilitated by the way. Due to the low height, it is also possible in particular to create systems in which the passengers can safely disembark. That In these cases, walk-in areas are preferably created, which facilitate an exit on an open track in emergencies. To exit and enter the shielding units, aids, e.g. Treads or ladders created These also serve the maintenance personnel to climb the shielding walls.
• the recesses are preferably to be laid out so that the persons involved in maintenance and assembly receive additional protection against the dangers of fast moving vehicles and trains through the shielding unit. This also makes it possible for railways to avoid blocking the lines during maintenance work. This in turn is an advantage which contributes to the cost savings.
• shielding also completely made of concrete elements into consideration.
• These are preferably designed such that it has an L-shaped profile in cross section.
• An L-leg is vertically aligned while the other is horizontal
• the two legs are arranged approximately at right angles to each other.
• the horizontal leg serves with its bottom surface as a support surface for the installation of soundproof walls.
• the design as an L-shaped profile in cross section causes a stepped ausgestaltetes carrier element is formed.
• the first stage includes the horizontally oriented L-leg, while the second stage forms the vertically oriented L-leg.
• the area comparable to the seat area is referred to as the floor area, horizontally aligned top surface or, for short, as the top surface.
• the recesses described for receiving lines are arranged, preferably in the bottom surface of the opposite horizontally oriented top surface.
• the recesses in the vertically designed surfaces, preferably in those of the vertically arranged a backrest of a bench comparable leg.
• the openings are not accessible from above, but laterally.
• the closing mechanisms are to be arranged.
• the carrier unit or shielding parallel to roads or railways cables and lines can also be performed in parallel to the aforementioned roads with appropriate design of the recesses, without additional earthworks are required.
• the recesses are designed such that they are aligned on the side facing away from the sound side of the support member. This ensures that in case of possible maintenance, e.g. along a railway line, safe inspections can be made.
• the maintenance workers are protected by the vertically oriented leg side of the support element.
• the shielding units according to the invention can also be any other shapes have, for example, a cuboid configuration.
• conventional concrete cuboid are used, in which preferably recessed from the top recesses for the installation of cables.
• On these recesses are preferably cable duct cover.
• the soundproofing elements are arranged on the vertical L-leg. This can be done either on the side facing the sound side of the vertical L-leg, or on the side facing away from it. Likewise, the soundproofing elements can be arranged on both sides.
• the soundproofing elements are attached to the vertical surface facing the sound side of the cuboid.
• the two surfaces of the cuboid, the Schallschutzlei elements can be arranged in this case.
• noise absorbing mats For example, those come into consideration, as described in WO 2010/128937 A1. Namely, mats made of rubber granules and having air-permeable pores or channels are used there. These may be mounted on the surfaces of the support member, e.g. be screwed on.
• anti-noise elements as described, for example, in FR 2683368.
• Such elements may have a structure that either prevents or minimizes the reflected sound.
• it can be steel plates with a special profile, in particular a corrugated profile.
• materials which, for example, have wood particles which form a mineralized front layer are also possible.
• the shielding unit described is preferably made of concrete, textile concrete or fiber concrete and reinforced concrete.
• the concrete elements are designed to be sufficiently stable by dimension and weight. This avoids unnecessary earthworks (so-called heavyweight wall).
• the height of the shielding unit is preferably dimensioned in such a way that the sound emanating from the rolling wheels is shielded.
• the maximum height corresponds to that which corresponds to the distance between the bottom of the carrier element and the bottom of the train wagons.
• the heights are 55-120 cm above the top of the rail. Particularly suitable are 55, 76, 96 or 120 cm.
• the shielding unit is configured such that the horizontal upper area of the vertically oriented L-leg opposite the floor area has a width such that in the event of an emergency exit the passengers can safely get off the train.
• the outer wall of the L-leg also step aids, e.g. Ladder elements, be arranged to facilitate a descent of the passengers.
• the horizontally oriented parts of the L-shaped legs of the support element are designed in width and area in this case such that the passengers can move there safely.
• the shielding units can also have openings, which small animals should make it possible to get from one side to the other side of the carrier unit. Preferably, these break through the vertically oriented legs of the carrier unit, preferably below the laying direction of the lines.
• the recesses provided in the shielding unit serve to accommodate supply lines of all kinds.
• lines for fluids as well as cables, especially electrical lines can be laid.
• the carrier element is configured in such a way that it has an opening in at least one surface, preferably in the side facing away from the bottom surface of the carrier element, ie in the horizontally extending upper cover surface of the carrier element.
• the opening is accessible from above and it can be routed easily lines.
• Cable ducts can also be laid empty conduits or tube packages.
• the recess is provided with a closable device.
• these are standard cable duct covers.
• both the laying of the lines and the maintenance of the system is facilitated.
• so that the respective top surfaces have been designed as walk-in areas.
• the shielding units described are applied to the stand surfaces prepared according to the invention.
• the invention accordingly provides a method in which at least one base surface, at least one bonded carrier layer, at least one unbonded leveling layer and a noise-insulating unit are arranged one above the other on a bottom surface.
• the individual components have the meaning previously described in detail.
• the application by the method according to the invention can be carried out by means of a device which comprises an application unit for the bound and at least one application unit for the unbonded support layer.
• the bonded material according to the invention preferably has the configuration as a mat or lattice-shaped element.
• the device according to the invention is constructed such that the mats or grids can be used in rolled-up form. From the role according to the direction of movement of the device according to the invention the Mats or grid rolled out and applied to the ground.
• the device which can be used according to the invention furthermore contains an application unit for the pourable material. This is arranged so that the pourable material is applied to the rolled or resting on the ground mats.
• the pourable material which can be used according to the invention is preferably arranged in a storage container. This reservoir can be filled from the outside, for example with an excavator.
• the device includes a conveyor unit for transporting the pourable material from the storage container into the application unit
• the device is designed such that it is movable on a path parallel to the shielding unit.
• it is equipped with a rail chassis and can thus move on conventional tracks.
• a standing on the track two-way excavator is additionally available, which is attached by means of a tow bar to the device according to the invention.
• pourable material can be positioned above the storage container and filled into it.
• the application unit operates on the principle of a working memory. That it is a vessel-shaped configured unit which can be filled with the material from the reservoir.
• the main memory or the task unit contains at its lower end a closable opening.
• the unit may be related to the distance to the route, e.g. be adjusted by the track and the possibly predetermined inclination of the soil to be acted upon.
• the pourable material via a conveyor - such as a conveyor belt - are spent in the feeder.
• the reservoir is provided on its underside with a closable opening. In the simplest case, it is a mechanically operated slide. This can be opened so that the pourable material on the conveyor, such as a conveyor belt passes and are transported from there directly into the feeder can. From there, the pourable material reaches the non-woven mats or grids laid on the floor.
• the aforementioned device is not only suitable for the production of acoustic shielding units along traffic routes but also for the production of traffic areas of all kinds. These include u.a. the installation of edge or shunting paths along tracks and the production of a runway for cable duct troughs.
• the device according to the invention makes it possible to apply bound and unbound layers in one step.
• a compacting device e.g. a vibrating roller or a vibrating plate
• the base 2, the bonded layer 3 and the unbonded layer 4 can be applied.
• the height and inclination can be leveled.
• the track ballast on the railway tracks is preferably leveled and compacted with the vibrating roller. These then serve as a stand area.
• the device according to the invention can be adjusted so that a finished planum of bonded and unbound carrier layer in a width of 0.5 m to 1.5 m, preferably 0.7 m to 1 m, more preferably 0.8 m, is created.
• Different heights of the surface can be produced. Its inner edge is usually between 1.70 m and 2.50 m, measured from the track axis.
• the height of the subgrade is preferably between 0.2 m to 0.75 m below the top of the rail and may vary in this range.
• the device can be used in short shut-off periods as it can be lifted out of the track at any time using a two-way excavator. It is in fact not a track bound device that only with a train journey to the construction site, and from the construction site on - or has to be transported away. Therefore, however, the device described can also be designed in such a way that it can be equipped with conventional running gears equipped. That is, the device can also be designed so that it can be moved independently of tracks. In this case, the device can be set up for a variety of purposes. This includes the installation of walking and driving paths. For example, cycle paths or roads can be produced with the device described. But even then the application is not limited. For example, you can also create surfaces for sports facilities. Examples include the construction of tennis courts, treads for athletics competitions, including those suitable for high jump, long jump or throw run-off surfaces.
• the application unit can be used in such a way that by applying the fleece and then applying a debris surface from a tailor-made material adapted to the respective purposes, the corresponding surfaces for traffic or sports are created. Likewise, it is also possible to apply further layers to the surfaces following the preparation with the nonwoven and pourable material. These may be bitumen, asphalt, paving, e.g. stone or similar materials or even lawns act.
• FIG. 1 shows the structure of the shielding unit according to the invention.
• FIG. 2 shows the application unit which can be used according to the invention.
• FIG. 3 shows the application unit which can be used according to the invention in a side view.
• Figure 4 shows in side view an example of a gabion basket.
• FIG. 5 shows the arrangement of the shielding unit according to the invention on a
• FIG. 6 shows an example with a carrier element made of concrete.
• FIG. 7 shows a further example of a carrier element made of concrete.
• Figure 8 shows a shielding unit with auxiliary devices for entering.
• Figure 9 shows a variant with a passage for small animals.
• FIG. 10 shows in cross-section the acoustic shielding unit according to the invention.
• FIG. 11 shows the shielding unit in plan view with a cover for closing the recess.
• FIG. 12 shows an enlarged detail of the recess.
• Figure 13 shows in enlarged form the recess without closure in the plan.
• Figure 14 Figure of a recess with manhole cover
• Figure 15 Figure of an L-shaped element with lateral access to the
• Figure 16 L-shaped element with a plurality of recesses
• Figure 18 is a plan view of a cuboidal element
• FIG. 1 shows a noise-insulating unit 1. This is brought to rest on an unbonded layer 4 and a bound layer 3.
• the unbound layer 3 lies directly on the base 2.
• the layer 4 is a composition of a grit size of 2/5 in a thickness of about 5 cm. This is preferably applied in use on tracks in a width of 90 cm. Accordingly, the applied release fleece of the bonded layer 3 has a width of about 90 cm.
• FIG. 2 shows an application unit in which the nonwoven web 3 for the unbonded layer is located on a roll 5. From this it is applied via a pressure roller 19 on the base 2.
• the application unit comprises the main memory 17 with its opening 18.
• the reservoir 7 is filled, for example via the excavator 10 from the container 9.
• the storage container 7 has an opening 15. From this opening 15, the pourable material is transported via the conveyor belt 8 into the application unit 6 by means of a slide. From there, the material can then be applied to the unbonded layer 4 via the opening 18. For the planar edition of the bound material 3 carries a special pressure roller 17 concern.
• the application unit for the free-flowing material 6 can be adjusted in height by means of the device 14. Likewise, an inclination via the device 13 is possible.
• the device according to the invention like the excavator 10, is located on a track 11 with the track bed 16 underneath. There, the device can be moved. It can thus be achieved in one operation that the stand area for the arrangement of the soundproofing devices is prepared parallel to the tracks.
• FIG. 4 shows a carrier element 21 in the form of a lattice. It is a so-called. Gabions basket with spot-welded mesh mats 24 in the lattice mat a frost-proof riprap is introduced. Within the riprap is an element 31 made of concrete, on which an absorber mat 22 is arranged towards the track side. This forms the boundary layer between riprap and concrete. On the top surface 25 facing away from the bottom 27 of the shielding unit is a non-slip walk-on grating 26. Further, an impact conductor 23 is provided as a grounding.
• FIG. 5 shows the arrangement of the carrier element 21 on a railroad track 29. The size ratio to the railway carriage 30 can be seen.
• FIG. 6 shows a variant in which a carrier element 21 having a U-shaped profile in cross-section is provided. In the example of the invention this is designed as a concrete precast. In the cavity 22 a riprap is filled. The opening is closed by a grid-shaped element 34. Furthermore, a recess 35 is provided in the concrete of the support member 21, in this recess lines and pipes can be performed.
• FIG. 7 shows a variant of FIG. 3.
• a prefabricated concrete element having a cross-sectionally U-shaped profile is provided as the support element 21.
• a riprap 23 is filled in the cavity 22 .
• Evident is also a latticed configuration.
• FIG. 8 shows a variant of the embodiment according to FIG Tritt Anlagen 37, 38 for exceeding the shielding unit contains.
• FIG. 9 shows a variant of FIG. 6, in which a passage 36 for small animals is provided.
• the carrier element 41 has a limb 48 and 49.
• a noise insulating unit 42 is arranged on the leg 48.
• From the leg 49 is perpendicular to a wetterer weathered leg 40. This configuration creates the recess 43, in which cables and pipes can be installed.
• the leg 49 forms the bottom element. That he lies with his surface 46 on the floor space. In the horizontal surface 47 facing away from the bottom region 46, the opening 44 is provided for access to the recess.
• the horizontally oriented portion 51 of the leg 48 is according to the invention u.U. Also suitable to serve as an exit area for passengers in case of emergencies.
• the recess can be seen in the plan view, in which it is closed by a closure element 45, in the specific case by a manhole cover. This is designed so that it can be easily opened, so that maintenance or repair work can be performed.
• Figures 12 and 13 show the recess again in the detail view.
• the opening 44 in the horizontal side 47 facing away from the bottom surface 46 can be seen.
• the recess 43 with the cable channel cover 45 present in the shielding units according to the invention is shown in FIG.
• These are commercially available manhole covers, which can be opened for maintenance, repair and installation work.
• the cable duct cover is designed so statically that it is accessible.
• FIG. 15 shows a variant according to the invention in FIG. 10. That is, the recess 43 can be reached via additional accesses 51 and 52. Also over here If necessary, necessary repair, maintenance and installation work can be carried out.
• FIG. 16 shows a further variant of the invention in which a plurality of recesses 43 are provided for the laying of cables. In this case (not shown) is provided to arrange accesses as in Figures 10 and 15. That It may be present cable duct cover 7, or also the entrances 51 and 52 may be provided.
• FIG. 17 shows a shielding unit in cuboid shape. Evident is the recess 43 with the cable duct cover 45. Noise insulating units 42 may be arranged on the side walls 53.
• FIG. 18 shows the plan view of a cuboidal element.
• the recess 43 with cover 45 and access 52 can be seen

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

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• 2012
  • 2012-07-04 DE DE102012105983.7A patent/DE102012105983A1/de not_active Ceased
• 2013
  • 2013-07-04 WO PCT/EP2013/064155 patent/WO2014006144A1/fr not_active Ceased

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