CN211571456U - Sound absorption short barrier beside high-speed railway track - Google Patents
Sound absorption short barrier beside high-speed railway track Download PDFInfo
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- CN211571456U CN211571456U CN201922258781.5U CN201922258781U CN211571456U CN 211571456 U CN211571456 U CN 211571456U CN 201922258781 U CN201922258781 U CN 201922258781U CN 211571456 U CN211571456 U CN 211571456U
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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
Technical Field
The patent of the utility model relates to an outdoor noise control field of high-speed railway especially relates to a short protective screen of sound absorption by high-speed railway rail side.
Background
High speed railways have become one of the most effective ways for people to travel far. With the increasing construction and the increasing running speed of high-speed railways, the problem of outdoor noise generated by the high-speed railways becomes a prominent factor influencing the quality of life of residents along the line. How to reduce the noise outside the high-speed railway vehicle is a problem of international general attention.
The noise of the high-speed railway is mainly located in a wheel track area, a pantograph area, a workshop connection area and the like. Wherein, the noise of the wheel track area is the maximum sound source, and the energy accounts for more than 80%. The control of the noise outside the high-speed railway vehicle is a systematic project, and the noise barrier technology is used as a noise reduction measure on a propagation path, so that the noise outside the vehicle can be effectively reduced. The currently adopted sound barriers are mainly positioned at two sides of a line, the height is usually 2.15m or 3.15m, and the noise reduction effect is 3dB (A) -8 dB (A).
For the section with noise exceeding 3dB (A), the cost performance of the sound barrier is low. For the section exceeding 8dB (A), the height of the sound barrier needs to be at least more than 3.15m, which can cause the sight line of passengers to be blocked.
SUMMERY OF THE UTILITY MODEL
In order to overcome the shortcoming among the prior art, the utility model discloses provide a short protective screen of sound absorption by high-speed railway rail according to high-speed railway noise energy distribution law for fall the district section of making an uproar requirement within 3dB (A) or as a replenishment of sound barrier, adopt short protective screen and sound barrier's compound mode, improve noise reduction effect under the prerequisite that does not change the sound barrier height, guarantee passenger's visual landscape in the car.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a sound absorption short barrier beside a high-speed railway track extends along the outer side of the high-speed railway track, and comprises an upright sound absorption wall and a bevel 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, and 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 height of the top of the inclined section is not more than that of the bottom edge 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 rail; 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.
Preferably, the upper part of the inner side of the first wall body inclines outwards by 30 degrees, and the first wall body 1 is made of sound absorption material which can adopt ultra-high strength concrete. The inclined plane of first wall body can increase sound absorbing area, and the inclined plane forms the loudspeaker opening with bogie 3 simultaneously, is favorable to the air current to propagate outwards.
Preferably, the inclined section of the back plate inclines 45 degrees to the outside, the back plate and the first wall form a sound absorption body structure, and the inclined section of the back plate thickens the thickness of the sound absorption structure, increases the sound absorption area and ensures the sound insulation of the structure.
In an embodiment of the present invention, the sound absorption layer inside the second wall is an ultra-high strength concrete layer, and the thickness of the sound absorption 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 the outer lower part of the second wall body outwards. The second wall body is fixed on the bridge floor, and the stress strength is guaranteed by the L-shaped structure.
In an embodiment of the present invention, the thickness of the upper portion of the second wall is 20cm, the thickness of the lower portion of the second wall is 25cm, the height of the second wall is 75cm, and the height of the first wall is 100 cm.
Preferably, the top edge of the inclined section is equal to the bottom edge of the folded surface 5 in height, and is 95-120 cm. Preferably, the lower portion of the angled sound-absorbing wall has the same thickness as the upper portion of the upright sound-absorbing wall.
The sound absorption short barrier beside the high-speed railway track has convenient installation and low manufacturing cost; it is close and sound absorbing area is big from the regional noise of wheel rail, can effectively reduce the noise outside the car. The short barrier and the bogie form a horn mouth, so that the outward propagation of airflow is facilitated, the service life is prolonged, and the maintenance cost is reduced. The structure can be used for a section with noise exceeding 3dB (A), and cost is saved. In addition, the structure can be used as a supplement of a sound barrier and used for a section with noise exceeding 8dB (A), and the problem that the height of the sound barrier needs to be increased due to the requirement of a noise reduction effect is solved by adopting the combination of a short barrier and the sound barrier. The structure also has a better landscape effect.
Drawings
Fig. 1 is a schematic view of the usage state of the sound absorption short barrier beside the high-speed railway track.
In the figure:
1. a first wall; a second wall; 3, a bogie; 4, steel rails;
5. folding the surface outwards; 6, sound absorption layer; a back plate; and 8, bridge deck.
Detailed Description
The structure of the sound absorption short barrier beside the high-speed railway rail of the present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses a short protective screen of other sound absorption of high-speed railway rail extends along the high-speed railway track outside for reduce car external noise. As shown in fig. 1, the sound-absorbing short barrier includes an upright type sound-absorbing wall and a dog-ear type sound-absorbing wall fixedly mounted on the upright type sound-absorbing wall.
In detail, the corner-folded sound absorption wall is composed of a first wall body 1 and a back plate 7 arranged on the outer side of the first wall body 1, wherein the first wall body 1 is a sound absorption wall body, the upper part of the inner side of the first wall body 1 inclines outwards by 30-45 degrees to form an outer folding surface 5, and therefore the pneumatic load borne by the short barrier beside the rail is reduced. The back plate 7 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 to the outside by 30-45 degrees, and the top height of the inclined section is not more than the bottom edge height of the outer folding surface 5. The first wall body 1 and the bevel type back plate 7 form a sound absorber, and the noise reduction effect of the short barrier beside the rail on the noise in the wheel rail area is greatly guaranteed. The vertical sound absorption wall is composed of a second wall body 2 and a sound absorption layer 6 arranged on the whole inner side surface of the second wall body 2, and the height of the second wall body 2 is flush with the top surface of a steel rail 4 of the high-speed railway. The inner side of the sound absorption layer 6 is 200cm from the centre line of the rail, since a low barrier is required to function as a crash wall. The bottom of the back plate 7 is fixedly connected with the second wall 2, and the overall height of the sound absorption short barrier is 150 and 175 cm.
The sound absorption layer 6 can be made of ultra-high-strength concrete, the strength of the ultra-high-strength concrete is generally not lower than C60, and the thickness of the sound absorption layer 6 is generally 2-5 cm.
In order to improve the stress strength, the thickness of the lower part of the second wall body 2 can be thickened, so that the longitudinal section of the second wall body is L-shaped and is formed by extending the lower part of the outer side of the second wall body 2 outwards. The lower portion of the angled sound-absorbing wall is generally the same thickness as the upper portion of the upright sound-absorbing wall.
Preferably, the top edge of the inclined section of the back plate 7 is equal to the bottom edge of the external folding surface 5 of the second wall body 2 in height, and is 95-120 cm.
In one embodiment of the present invention, the thickness of the upper portion of the second wall 2 is 20cm, the thickness of the lower portion is 25cm, and the height is 75 cm; the upper part of the inner side of the first wall body 1 inclines outwards by 30 degrees, the inclined section of the back plate 7 inclines outwards by 45 degrees, and the height of the first wall body 1 is 100 cm; the length of the sound absorbing short barrier depends on the actual need. The first wall body 1 is also made of ultra-high-strength concrete, and the strength of the ultra-high-strength concrete is generally not lower than C60.
Claims (8)
1. The utility model provides a short barrier of sound absorption beside high-speed railway track, its extends along the high-speed railway track outside which characterized in that: the sound absorption short barrier 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 (1) and a back plate (7) arranged on the outer side of the first wall body (1), the first wall body (1) is a sound absorption wall body, and the upper part of the inner side of the first wall body (1) inclines outwards by 30-45 degrees to form an outer folding surface (5); the back plate (7) 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 (5);
the vertical sound absorption wall is composed of a second wall body (2) and a sound absorption layer (6) arranged on the whole inner side surface of the second wall body (2), the height of the second wall body (2) is flush with the top surface of a steel rail (4) of the high-speed railway, and the inner side of the sound absorption layer (6) is 200cm away from the central line of the rail;
the bottom of the back plate (7) is fixedly connected with the second wall body (2), and the height of the sound absorption short barrier is 150 and 175 cm.
2. The sound absorbing short barrier of claim 1, wherein: the upper part of the inner side of the first wall body (1) inclines outwards by 30 degrees, and the inclined section of the back plate (7) inclines outwards by 45 degrees.
3. An acoustic short barrier according to claim 1 or 2, characterized in that: the sound absorption layer (6) is an ultrahigh-strength concrete layer, and the thickness of the sound absorption layer (6) is 2-5 cm.
4. The sound absorbing short barrier of claim 3, wherein: the longitudinal section of the second wall body (2) is L-shaped and is formed by outwards extending the lower part of the outer side of the second wall body (2), the thickness of the upper part of the second wall body (2) is 20cm, and the thickness of the lower part of the second wall body is 25 cm.
5. The sound absorbing short barrier of claim 4, wherein: the height of the second wall body (2) is 75 cm; the height of the first wall body (1) is 100 cm.
6. The sound absorbing short barrier of claim 5, wherein: the top edge of the inclined section of the back plate (7) is equal to the bottom edge of the outer folding surface (5) in height and is 95-120 cm.
7. The sound absorbing short barrier of claim 6, wherein: the first wall body (1) is made of ultra-high-strength concrete.
8. The sound absorbing short barrier of claim 7, wherein: the thickness of the lower part of the angle type sound absorption wall is the same as that of the upper part of the vertical type sound absorption wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922258781.5U CN211571456U (en) | 2019-12-17 | 2019-12-17 | Sound absorption short barrier beside high-speed railway track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922258781.5U CN211571456U (en) | 2019-12-17 | 2019-12-17 | Sound absorption short barrier beside high-speed railway track |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211571456U true CN211571456U (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922258781.5U Active CN211571456U (en) | 2019-12-17 | 2019-12-17 | Sound absorption short barrier beside high-speed railway track |
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| Country | Link |
|---|---|
| CN (1) | CN211571456U (en) |
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- 2019-12-17 CN CN201922258781.5U patent/CN211571456U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210112 Address after: 201 Ligang building, No. 82, West 2nd Road, Airport Economic Zone, Dongli District, Tianjin Patentee after: CHINA RAILWAY DESIGN Corp. Patentee after: China National Railway Group Co.,Ltd. Address before: 201 Ligang building, No. 82, West 2nd Road, Airport Economic Zone, Dongli District, Tianjin Patentee before: CHINA RAILWAY DESIGN Corp. |
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| TR01 | Transfer of patent right |