EP2083120A2 - Sound insulation and side enclosure for the bulkhead body for rail assemblies of rail-bound vehicles - Google Patents

Abstract

The device has a gabion in adjacent proximity of the track, which is filled with crushed stones and lies on a sub-structure protective layer. The height of a gabion under adherence with a small space profile exceeds over track elevation. A sub ballast mat (1) is arranged under ballasted track, where the sub ballast mat is made of geotextile or an elastomeric layer (2).

Description

The invention relates to a device for realizing an effective and material-saving sound insulation for track systems of rail vehicles.

In conventional track systems, the superstructure is usually formed by a bed of loose gravel, in which the sleepers lie with the rails. This superstructure is carried by a substructure, which is usually formed from earth above ground routes. These can be terrain-like layers, cuts or dams. The storage of the track grid in a bed of loose gravel can be roughly characterized as "floating". Track rust and gravel bed act like a big spring when overrolled. Even a substructure made of soil has a resilient effect, which is dependent on its rigidity.

The usual gravel superstructure of the railway consists of a track grid, which is supported on a gravel bed. The gravel has u.a. the task of distributing the loads from railway traffic and ensuring the positional stability of the track. Due to the cyclical loads caused by the rail traffic, the ballast stones are relocated and thus settlements of the ballast lead to a change in the track position. In order for the gravel to reach a permanently consolidated state with a decaying settlement rate, horizontal stresses are necessary. On the free route, the horizontal stresses can essentially be built only in the direction of travel, since the gravel is not edged laterally. The required positional stability is ensured by the fact that in front of the head of the threshold ballast is located, which absorbs the horizontal forces. Under the gravel is usually an antifreeze or a protective layer. In addition to load distribution, these layers also have the task of selectively discharging the surface water. In the consolidated state, these layers are very sensitive to disturbances.

Depending on the local requirements, soundproofing measures may be necessary on the tracks, which may be ensured, for example, by a soundproofing wall. Due to the propagation of the sound waves, the height of the sound insulation wall depends on the distance to the track axis. The farther the soundproofing wall away from the track, the higher the wall must be for equal effectiveness. With the height but also the procurement price, the maintenance costs, and the free view of the residents is severely limited. In addition, classic soundproof walls provide a typical point of attack for graffiti.

The arrangement of low noise barriers in the immediate vicinity of the track is made difficult in existing routes in that the establishment of the noise barriers either the antifreeze or layer protection layer disturbs or require a considerable installation effort at the threshold, combined with difficult maintenance of the track. The disruption of the protective layers can lead to subsidence and drainage problems and thus to increased maintenance costs.

It is therefore an object of the invention to provide a device with which a soundproofing is realized, the construction of which is as effective as possible, material-saving and cost-effective.

This object is achieved in connection with the preamble of claim 1 according to the invention by the features specified in claim 1.

According to sit in track near the track from the track with gravel or other material filled gabion on the surface protection layer, the gabion protrude in compliance with the gauge space so far beyond the track bed height that they form an effective sound insulation.

The height and configuration of the lateral enclosure of the ballast bed is selected depending on the distance to the track axis so that the required sound insulation is achieved. The gabions thus serve as a mechanical enclosure of the ballast and as a low noise barrier. It must be ensured that the required clearance gauge is maintained.

The gabions are placed directly on the protective layers. The layers are not disturbed by the measure, so that no increased track position changes are to be expected. The drainage is still possible without disturbances and can be improved or selectively controlled by the lining of geotextiles or drainage mats. By inserting geotextiles, the stability of the protective layers loaded by the gabions can be increased at the same time.

Due to the lateral enclosure of the ballast bed by the soundproof gabions, the horizontal load distribution of the ballast is supported. Because of the associated reduction in subsidence, the position stability and the track quality are also increased. At the same time can be the same or even Increased positional stability of the gravel cross-section can be reduced in the ballast bed.

When maintaining the track, nothing changes. It is still possible with standard methods.

With appropriate design of the top of the gabions they can be made accessible.

Because the soundproofing gabions are close to the track, they can be kept low while still providing targeted and effective sound insulation. High sound insulation walls are avoided. With the same or even higher effectiveness of the sound insulation, the cost of the soundproofing measure is reduced due to the lower construction.

The gabions can be made of wire or other materials.

Claims 2 to 7 contain advantageous embodiments of the inventive solution of claim 1.

According to claim 2, the gabions can also be installed primarily for the purpose of lateral enclosure of the ballast track. Since sound protection requirements play only a rudimentary role, it is sufficient to dimension the height of the gabion up to the top of the rail. Further restrictions such as clearance gauge profiles etc. do not have to be considered.

The gabion can be prefabricated in accordance with claim 3 in an effective manner or filled only on site and then assembled with little effort on site in a row together.

The installation can be done from the track with a two-way excavator. Automated installation methods with high layer capacities are possible.

According to claim 4, it is advantageous to use contaminated ballast with targeted drainage and / or old ballast as filler for the soundproof gabions.

Furthermore, it is possible to use according to claim 5 as a filler ecologically valuable natural materials. Depending on the installation location, the fillers of the gabions (natural stones, gravel, etc.) can be selected to better integrate sound insulation into the landscape.

On tracks with conventional ballast superstructure, the soundproof gabions act as lateral edging of the ballast track. They thus advantageously prevent the flow of material layers at high dynamics, ie high dynamic loads due to a high number of overrunning trains as well as over-traveling trains with high axle loads or a soft substructure, in which otherwise gravel could run off to the side. Since lateral displacement of the ballast is prevented, the soundproof gabions according to claim 6 make it particularly advantageous to provide at least one layer of elastomer and / or geotextile or the like underneath the ballast track. as Unterschottermatten on the Erdplanum insert. As a result, a vibration reduction is achieved. For routes that have a ballast track with rails mounted on sleepers and a foundation supporting the ballast, this was not possible because of the lack of lateral enclosure of the ballast track, as on the vibration-damping layer of gravel flows away slightly to the side.

According to claim 7, at least one geotextile or elastomeric layer can be introduced for further vibration reduction due to the existing by the soundproof gabions lateral enclosure of the ballast track between the material layers of the ballast track.

The invention is explained below with reference to an embodiment and a figure. Fig. 1 shows in cross-section a track system for rail-bound vehicles, with a conventional ballast track, which is close to the track with soundproofing covers included.

LIST OF REFERENCE NUMBERS

1

ballasted

2

elastomer layer

3

Soundproofing gabion

4

Base / substrate

5

rail

Claims (7)

Device for the realization of an effective and material- saving sound insulation for track systems of rail vehicles, characterized in that sit near the track side of the track with gravel or other material gabions sitting on the surface protection layer whose height extends beyond the track bed height while maintaining the clearance profile so far that the gabion form an effective soundproofing. Device for the realization of an effective and material-saving lateral restraint rail tracks for rail vehicles, characterized in that sit near the track side of the track with gravel or other material gabions sitting on the surface protection layer whose height protrudes in compliance with the gauge space up to the rail height above the track bed height. Device according to at least one of the claims, characterized in that the gabions are already prefabricated at the factory. Device according to at least one of claims, characterized in that the gabions are filled with old ballast or contaminated ballast with targeted drainage. Device according to at least one of the claims, characterized in that the gabions are filled with natural stones. Device according to at least one of the claims, characterized in that at least one under ballast mat of geotextile or an elastomer layer is arranged under the ballast track. Device according to at least one of the claims, characterized in that at least one geotextile or elastomer layer is introduced between the material layers of the ballast superstructure.

Images