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High-speed railway noise reduction structure

A high-speed railway, noise reduction technology, applied in the direction of noise absorption devices, bridge parts, bridges, etc., can solve the problems of heavy maintenance workload, high maintenance cost, passenger line of sight blocking, etc., to achieve small maintenance workload and consistent service life , the effect of good landscape effect

Pending Publication Date: 2022-01-25
CHINA RAILWAY DESIGN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The construction cost of a 2.15m-high metal sound barrier on one side is about 2600 yuan per linear meter. For the section where the noise exceeds the standard within 3dB(A), it is less cost-effective to use a sound barrier
For sections exceeding the standard by more than 8dB(A), the height of the sound barrier must be at least 3.15m, which will block the sight of passengers
[0005] At present, there are no measures for noise reduction within 3dB(A) in the field of noise control outside high-speed railways
If a 2.15m-high metal sound barrier is used, the cost is too high and the maintenance workload is heavy. When the service life is reached (the design service life of the sound barrier unit plate is 25 years), it needs to be replaced, and the maintenance cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a high-speed railway noise reduction structure 7 extends along the outer side of the high-speed railway track for reducing noise outside the vehicle. The noise reduction structure is installed on the protective wall 1, and the inner side of the noise reduction structure is 200cm away from the center of the track.

[0032] In detail, the noise reduction structure 7 has a rectangular section in the vertical direction, which is formed by extending upward from the top of the protective wall. The height of the rectangular section is 50 cm, and the width is 20 cm. The inner top of the rectangular section is close to the railway building limit 3 .

Embodiment 2

[0034] Such as figure 2 As shown, a high-speed railway noise reduction structure extends along the outer side of the high-speed railway track to reduce the noise outside the vehicle. The noise reduction structure is installed above the protective wall 1, and the inside of the bottom of the noise reduction structure is 200cm away from the center of the track.

[0035] In detail, the cross-sectional shape of the noise reduction structure in the vertical direction is stepped, surrounded by a stepped top surface, an inner surface 8f, an outer surface 8d and a bottom surface 8e, and the stepped top surface One side sinks to form, the inner surface 8f is flush with the inside of the protective wall, and the outer surface 8d is flush with the outer side of the protective wall; the bottom surface 8e is located at the top of the protective wall; the width of the first horizontal section 8a of the stepped top surface is 10cm, The width of the second horizontal section 8c is 10cm, and ...

Embodiment 3

[0037] Such as image 3 As shown, a high-speed railway noise reduction structure extends along the high-speed railway track to reduce the noise outside the vehicle. The arc-shaped structure is installed above the protective wall, and the inside of the bottom of the noise reduction structure is 200cm away from the center of the track.

[0038] In detail, the noise reduction structure has an arc-shaped cross section in the vertical direction, and is composed of an arc-shaped inner surface 10a, an arc-shaped outer surface 10b, a top surface, and a bottom surface, and the arc-shaped inner and outer surfaces are at the same height. The bottom surface is installed on the protective wall, with the same width as the protective wall, which is 20cm. The width of the upper surface is 7cm. The radius of the arc-shaped inner surface 10a is 332.1 cm, and the radius of the arc-shaped outer surface 10b is 305.5 cm. The overall height of the arc-shaped structure is 100 cm, and the projected...

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Abstract

The invention discloses a high-speed railway noise reduction structure which is arranged on a bridge protection wall, extends along the outer side of a high-speed railway track and is located outside a railway building limit, and the side, close to the track, of the noise reduction structure is 180-240 cm away from the center line of the track and 40-125 cm away from the lower portion of a wheel track and a train. The section, in the vertical direction, of the noise reduction structure is of a rectangular structure or a stepped structure or a bevel structure or an arc-shaped structure. In a section with noise exceeding 3dB (A), trackside noise reduction structures with different heights and forms are adopted to replace a sound barrier, so that the construction cost can be greatly reduced, the maintenance workload is extremely small, and the service life is long.

Description

technical field [0001] The patent of the present invention relates to the field of noise control outside high-speed railway vehicles, in particular to a noise reduction structure for high-speed railways. Background technique [0002] High-speed rail has become one of the common means of transportation for people to travel. With the increasing construction of high-speed railways and the improvement of operating speed, the noise of passing high-speed railways has affected the life, work and study of residents along the line. How to reduce the noise outside the high-speed railway has become an issue of international concern. [0003] The noise of high-speed railways mainly comes from wheel-rail areas, pantograph areas, and workshop connection areas. Among them, the noise in the wheel-rail area is the largest sound source, accounting for more than 65% of the energy. The noise control outside the high-speed railway is a systematic project. As a noise reduction measure on the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F8/00E01D19/10
CPCE01F8/00E01D19/103
Inventor 齐春雨何宾刘冀钊胡文林马广苏伟王少林姜博龙郭帅杰韩珈琪
Owner CHINA RAILWAY DESIGN GRP CO LTD
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