CN211571456U - Sound absorption short barrier beside high-speed railway track - Google Patents

Abstract

The utility model discloses a sound absorption short barrier beside a high-speed railway track, which comprises an upright sound absorption wall and a bevel type sound absorption wall fixedly arranged on the upright sound absorption wall; the angle-folded sound absorption wall is composed of a first wall body and a back plate arranged on the outer side of the first wall body, the first wall body is a sound absorption wall body, the upper part of the inner side of the first wall body inclines outwards by 30-45 degrees to form an outer folding surface 5; the back plate is a rigid back plate, the longitudinal section of the back plate consists of a first vertical section, an inclined section and a second vertical section which are sequentially connected from bottom to top, the inclined section inclines outwards by 30-45 degrees, and the top height of the inclined section does not exceed the bottom edge height of the outer folding surface; the vertical sound absorption wall is composed of a second wall body and a sound absorption layer arranged on the whole inner side surface of the second wall body, the height of the second wall body is flush with the top surface of a steel rail of the high-speed railway, and the inner side of the sound absorption layer is 200cm away from the central line of the track; the bottom of the back plate is fixedly connected with the second wall, and the height of the sound absorption short barrier is 150-175 cm. The structure has low manufacturing cost and effectively reduces the noise outside the vehicle.

Description

Sound-absorbing short barriers beside high-speed railway tracks

technical field

The utility model patent relates to the field of high-speed railway outdoor noise control, in particular to a sound-absorbing low barrier beside the high-speed railway track.

Background technique

High-speed rail has become one of the most efficient ways for people to travel long distances. With the increasing construction of high-speed railways and the improvement of operating speed, the resulting outdoor noise problem has become a prominent factor affecting the quality of life of residents along the line. How to reduce the noise outside the high-speed railway has become an international concern.

High-speed railway noise is mainly located in the wheel-rail area, pantograph area, and workshop connection area. Among them, the noise in the wheel-rail area is the largest sound source, and the energy accounts for more than 80%. External noise control of high-speed railways is a systematic project. As a noise reduction measure on the propagation path, sound barrier technology can effectively reduce external noise. The currently used sound barriers are mainly located on both sides of the line, the height is usually 2.15m or 3.15m, and the noise reduction effect is 3dB(A) ~ 8dB(A).

For the section where the noise exceeds the standard 3dB(A), the cost-effectiveness of using sound barriers is relatively low. For sections exceeding the standard by more than 8dB(A), the height of the sound barrier needs to be at least 3.15m, which will cause the passenger's sight to be blocked.

Utility model content

In order to overcome the shortcomings in the prior art, the utility model provides a sound-absorbing short barrier beside the high-speed railway track according to the noise energy distribution law of the high-speed railway, which is used for the section where the noise reduction requirement is within 3dB(A) or as a sound barrier It is a supplement of the low barrier and sound barrier to improve the noise reduction effect without changing the height of the sound barrier to ensure the visual landscape of the passengers in the car.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

A low sound-absorbing barrier beside a high-speed railway track, which extends along the outer side of the high-speed railway track, and the low sound-absorbing barrier comprises a vertical sound-absorbing wall and a folded-angle sound-absorbing wall fixed on the vertical sound-absorbing wall; The angled sound-absorbing wall is composed of a first wall body and a backboard arranged outside the first wall body, the first wall body is a sound-absorbing wall body, and the inner upper part of the first wall body is inclined to the outside by 30-45 °, forming the outer folded surface 5; the back plate is a steel back plate, and its longitudinal section is composed of a first vertical section, an inclined section and a second vertical section connected in sequence from bottom to top, and the inclined section is directed toward The outer side is inclined at 30-45°, and the height of the top of the inclined section does not exceed the height of the bottom edge of the outer folded surface; the vertical sound-absorbing wall is composed of a second wall and a sound-absorbing layer arranged on the entire inner surface of the second wall. The height of the second wall is flush with the top surface of the rail of the high-speed railway, and the inner side of the sound-absorbing layer is 200cm away from the centerline of the track; the bottom of the back plate is fixedly connected to the second wall, and the sound-absorbing low barrier is The height is 150-175cm.

Preferably, the upper part of the inner side of the first wall body is inclined to the outer side by 30°, and the first wall body 1 is made of sound-absorbing material, and the sound-absorbing material can be ultra-high-strength concrete. The inclined surface of the first wall can increase the sound absorption area, and at the same time, the inclined surface and the bogie 3 form a horn opening, which is conducive to the outward propagation of the air flow.

Preferably, the inclined section of the back panel is inclined to the outside by 45°, the back panel and the first wall form a sound-absorbing body structure, and the inclined section of the back panel thickens the thickness of the sound-absorbing structure, increases the sound-absorbing area, and ensures that Sound insulation of the structure.

In an embodiment of the present invention, the sound-absorbing layer inside the second wall is an ultra-high-strength concrete layer, and the thickness of the sound-absorbing layer is preferably 2-5 cm.

In addition, preferably, the longitudinal section of the second wall body is L-shaped, and is formed by extending outward from the lower part of the outer side of the second wall body. The second wall is fixed on the bridge deck, and the L-shaped structure ensures the strength of the force.

In an embodiment of the present invention, the thickness of the upper part of the second wall is 20 cm, the thickness of the lower part is 25 cm, the height of the second wall is 75 cm, and the height of the first wall is 100 cm.

Preferably, the top edge of the inclined section and the bottom edge of the outer folded surface 5 have the same height, which is 95-120 cm. Preferably, the lower part of the angled sound absorbing wall has the same thickness as the upper part of the upright sound absorbing wall.

The high-speed railway trackside sound-absorbing low barrier of the utility model is easy to install and has low manufacturing cost; it is close to the noise in the wheel-rail area and has a large sound-absorbing area, which can effectively reduce the noise outside the vehicle. The short barrier and the bogie form a bell mouth, which is conducive to the outward spread of the air flow, prolonging the service life and reducing the maintenance cost. The structure can be used in the section where the noise exceeds the standard by 3dB(A), saving cost. In addition, the structure can be used as a supplement to the sound barrier, and can be used in the section where the noise exceeds the standard by 8dB(A). The combination of the low barrier and the sound barrier solves the problem of increasing the height of the sound barrier due to the requirement of noise reduction effect. The structure also has a good landscape effect.

Description of drawings

FIG. 1 is a schematic diagram of the use state of the high-speed railway trackside sound-absorbing low barrier of the present invention.

In the picture:

1. The first wall; 2. The second wall; 3. The bogie; 4. The rail;

5. Outer folded surface; 6. Sound absorption layer; 7. Backboard; 8. Bridge deck.

Detailed ways

The structure of the high-speed railway trackside sound-absorbing low barrier of the present invention will be described in detail below with reference to the accompanying drawings.

The high-speed railway trackside sound-absorbing low barrier of the utility model extends along the outer side of the high-speed railway track, and is used for reducing the noise outside the vehicle. As shown in FIG. 1 , the low sound-absorbing barrier includes a vertical sound-absorbing wall and a angled sound-absorbing wall fixed on the vertical sound-absorbing wall.

In detail, the angled sound-absorbing wall is composed of a first wall 1 and a backboard 7 disposed outside the first wall 1 . The first wall 1 is a sound-absorbing wall, and the first wall 1 The upper part of the inner side is inclined to the outer side by 30-45° to form an outer folded surface 5 to reduce the aerodynamic load on the trackside short barrier. The back plate 7 is a steel back plate, and its longitudinal section is composed of a first vertical section, an inclined section and a second vertical section connected in sequence from bottom to top, and the inclined section is inclined to the outside by 30-45°, The height of the top of the inclined section does not exceed the height of the bottom edge of the outer folded surface 5 . The first wall 1 and the angled backboard 7 form a sound absorbing body, which greatly ensures the noise reduction effect of the trackside low barrier on the noise in the wheel-rail area. The vertical sound-absorbing wall is composed of a second wall 2 and a sound-absorbing layer 6 disposed on the entire inner surface of the second wall 2. The height of the second wall 2 is flush with the top surface of the rail 4 of the high-speed railway. The inner side of the sound absorbing layer 6 is 200 cm away from the center line of the track, because the short barrier is required to have the function of a crash wall. The bottom of the backboard 7 is fixedly connected to the second wall 2, and the overall height of the sound-absorbing low barrier is 150-175 cm.

The sound-absorbing layer 6 can be made of ultra-high-strength concrete, and the strength of the ultra-high-strength concrete is generally not lower than C60, and the thickness of the sound-absorbing layer 6 is generally 2-5 cm.

In order to improve the force-bearing strength, the thickness of the lower part of the second wall body 2 can be thickened, so that the longitudinal section is L-shaped, which is formed by extending outward from the lower part of the outer side of the second wall body 2 . The lower part of the angled sound absorbing wall is generally the same thickness as the upper part of the upright sound absorbing wall.

Preferably, the top edge of the inclined section of the back plate 7 is the same height as the bottom edge of the outer folded surface 5 of the second wall body 2, which is 95-120 cm.

In an embodiment of the present invention, the upper part of the second wall 2 has a thickness of 20cm, a lower part has a thickness of 25cm and a height of 75cm; the inner upper part of the first wall 1 is inclined to the outside by 30°, and the inclined section of the back plate 7 The height of the first wall 1 is 100cm when it is inclined to the outside by 45°; the length of the sound-absorbing low barrier is determined according to the actual needs. The first wall body 1 is also made of ultra-high-strength concrete, and the strength of ultra-high-strength concrete is generally not lower than C60.

Claims (8)

1. A sound-absorbing low barrier beside a high-speed railway track, which extends along the outside of the high-speed railway track, is characterized in that: the sound-absorbing low barrier comprises an upright sound-absorbing wall and a Angled sound-absorbing wall; The angled sound-absorbing wall is composed of a first wall body (1) and a back plate (7) arranged on the outside of the first wall body (1), the first wall body (1) is a sound-absorbing wall body, and the first wall body (1) is a sound-absorbing wall body. The upper part of the inner side of a wall (1) is inclined to the outer side by 30-45° to form an outer folded surface (5); A vertical section, an inclined section and a second vertical section are formed, the inclined section is inclined to the outside by 30-45°, and the height of the top of the inclined section does not exceed the height of the bottom edge of the outer folded surface (5); The vertical sound-absorbing wall is composed of a second wall (2) and a sound-absorbing layer (6) arranged on the entire inner surface of the second wall (2). The height of the second wall (2) is the same as that of the high-speed railway. The top surface of the rail (4) is flush, and the inner side of the sound absorbing layer (6) is 200cm away from the centerline of the rail; The bottom of the backboard (7) is fixedly connected with the second wall (2), and the height of the sound-absorbing low barrier is 150-175 cm. 2. The low sound-absorbing barrier according to claim 1, characterized in that: the inner upper part of the first wall (1) is inclined to the outside by 30°, and the inclined section of the back plate (7) is inclined to the outside by 45° °. 3. The short sound-absorbing barrier according to claim 1 or 2, characterized in that: the sound-absorbing layer (6) is an ultra-high-strength concrete layer, and the thickness of the sound-absorbing layer (6) is 2-5 cm. 4. The low sound-absorbing barrier according to claim 3, characterized in that: the longitudinal section of the second wall (2) is L-shaped, and is formed by extending outward from the lower part of the outer side of the second wall (2), The thickness of the upper part of the second wall (2) is 20 cm, and the thickness of the lower part is 25 cm. 5. The low sound-absorbing barrier according to claim 4, characterized in that: the height of the second wall body (2) is 75 cm; the height of the first wall body (1) is 100 cm. 6. The low sound-absorbing barrier according to claim 5, wherein the top edge of the inclined section of the back plate (7) is the same height as the bottom edge of the outer folded surface (5), which is 95-120 cm . 7. The low sound-absorbing barrier according to claim 6, wherein the first wall body (1) is made of ultra-high-strength concrete. 8 . The low sound-absorbing barrier according to claim 7 , wherein the lower part of the angled sound-absorbing wall has the same thickness as the upper part of the vertical sound-absorbing wall. 9 .

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