CN113969548A - Noise reduction structure for high-speed railway - Google Patents
Noise reduction structure for high-speed railway Download PDFInfo
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- CN113969548A CN113969548A CN202010713552.2A CN202010713552A CN113969548A CN 113969548 A CN113969548 A CN 113969548A CN 202010713552 A CN202010713552 A CN 202010713552A CN 113969548 A CN113969548 A CN 113969548A
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- noise reduction
- speed railway
- protective wall
- reduction structure
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a noise reduction structure for a high-speed railway, which is arranged on a bridge protection wall, extends along the outer side of a high-speed railway track and is positioned outside the limit of a railway building, wherein the noise reduction structure is 180-240 cm away from the central line of the track at one side close to the track and 40-125 cm away from a wheel track and the lower part of a train; the cross section of the noise reduction structure in the vertical direction is of a rectangular structure, a stepped structure, a folded angle structure or an arc structure. In the section with noise exceeding 3dB (A), the trackside noise reduction structures with different heights and forms are adopted to replace the sound barrier, so that the construction cost can be greatly reduced, the maintenance workload is extremely low, and the service life is long.
Description
Technical Field
The invention relates to the field of noise control outside a high-speed railway vehicle, in particular to a noise reduction structure of a high-speed railway.
Background
High-speed railways have become one of the common transportation modes for people to travel. With the increasing construction and the increasing running speed of high-speed railways, the noise generated when the high-speed railways pass through influences the lives, works and study of residents along the lines. 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 mainly comes from 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 65%. 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 barrier is mainly positioned at a bridge railing, the height is usually 2.15m or 3.15m, and the noise reduction effect is 3dB (A) -8 dB (A).
The manufacturing cost of the high metal sound barrier with 2.15m on one side is about 2600 yuan/linear meter, and the cost performance of the sound barrier is lower for the section with noise exceeding 3dB (A). 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.
At present, no measure aiming at the requirement of noise reduction within 3dB (A) exists in the field of noise control outside a high-speed railway. If a 2.15m high metal sound barrier is adopted, the manufacturing cost is too high, the maintenance workload is large, and when the service life is reached (the design service life of the sound barrier unit plate is 25 years), the sound barrier unit plate needs to be replaced, and the maintenance cost is higher.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the noise reduction structure of the high-speed railway, which has low manufacturing cost, small maintenance amount and long service life according to the noise energy distribution rule and the line characteristics of the high-speed railway and is used for a section with the noise reduction requirement within 3dB (A).
In addition, as a supplementary measure of the sound barrier, a combination mode of a trackside noise reduction structure and the sound barrier is adopted, and the noise reduction effect is improved on the premise that the height of the sound barrier is unchanged.
In order to achieve the purpose, the invention adopts the following technical scheme:
a noise reduction structure for a high-speed railway is arranged on a bridge protection wall, extends along the outer side of a high-speed railway track and is located outside the limit of a railway building, and is 180-240 cm away from the central line of the track and 40-125 cm away from a wheel track and the lower part of a train on one side close to the track; the cross section of the noise reduction structure in the vertical direction is of a rectangular structure, a stepped structure, a folded angle structure or an arc structure.
The arc-shaped structure is defined by an inner surface, an outer surface, a top surface and a bottom surface, the inner surface and the outer surface are both arc-shaped, and the arc-shaped bending directions are consistent; the inner surface and the outer surface are connected through a top surface; the bottom surface is positioned on the protective wall and is as wide as or slightly narrower than the protective wall; the inner surface and the top surface are connected outside the limit of the railway building. The height of the arc-shaped structure is 20-100 cm, and the radius of the arc is larger than 20 cm; the width of the top surface is less than or equal to the width of the bottom surface.
The stepped structure is formed by surrounding a stepped top surface, an inner surface, an outer surface and a bottom surface; the stepped top surface is formed by sinking from the top surface to the inner side and comprises a first transverse straight section, a vertical straight section and a second transverse straight section which are sequentially connected from the inner side to the outer side, and the inner surface is coplanar with the inner side surface of the protective wall; and one ends of the first and second transverse straight sections close to the inner sides are positioned outside the limit of the railway building. The height of the stepped structure is 20-75 cm; the width of the first transverse straight section and the width of the second transverse straight section are both 5-15 cm, and the total width of the first transverse straight section and the second transverse straight section is less than or equal to the width of the protective wall.
The inner surface of the rectangular structure is coplanar with the inner side surface of the protective wall, and the width of the rectangular structure is less than or equal to that of the protective wall; the upper end of the interior surface of the rectangular structure is outside and adjacent to the confines of the railroad building. The height of the rectangular structure is 20-50 cm, and the width of the rectangular structure is larger than 5cm and is not larger than the width of the protective wall.
The angle-folding structure comprises a lower rectangular structure and an upper outward-folding structure; the lower rectangular structure is as wide as the protective wall or slightly narrower than the protective wall, and the height of the lower rectangular structure does not intrude into a railway building clearance; the inner surface of the upper folded structure is inclined outwards; the outer surface of the upper outward folding structure consists of a vertical section and an outer inclined section; the vertical section of the outer surface is connected with the inner surface through the upper surface.
Preferably, the height of the lower rectangular structure of the angle-folding structure is 0-50 cm, the height of the upper outward-folding structure is 20-100 cm, and the overall height of the angle-folding structure is 20-100 cm; the included angle between the inner surface of the angle-folding structure and the inner side vertical surface is 90-180 degrees, and the included angle between the outer side inclined section and the outer side vertical surface is 90-180 degrees.
The invention also provides a high-speed railway noise reduction system which is formed by combining the noise reduction structure and the sound barrier.
When the noise reduction structure is used for a new line, firstly, embedding a sleeve in a protective wall, and then connecting the noise reduction structure by using a bolt, or embedding and welding a steel plate; when the noise reduction structure is used for an existing circuit, a hole is drilled in the protection wall, and a chemical anchor bolt is embedded to connect the noise reduction structure.
It should be noted that the noise reduction structure is not only suitable for high-speed railways, but also suitable for high-speed railway roadbed sections, urban rail transit and ordinary railways.
The invention has the following beneficial effects:
1. the high-speed railway noise reduction structure is arranged at a position close to the wheel rail and the lower part of the train body, and adopts the trackside noise reduction structures with different heights and different forms, so that the environmental noise can be reduced by 1-3 dB (A). According to the noise reduction requirement, a corresponding trackside noise reduction structure can be selected to meet the noise reduction requirement of all sections within 3dB (A).
2. The single-side manufacturing cost of the trackside noise reduction structure is about 300 yuan/linear meter at most, the section within 3dB (A) exceeding the noise is used for replacing the sound barrier, the investment per linear meter is saved by at least 2300 yuan, the cost is reduced by about 88 percent relative to the sound barrier, the maintenance workload is extremely small, the service life is consistent with that of the protective wall, and the service life can reach 100 years.
3. By adopting the combination of the trackside noise reduction structure and the 2.15m metal sound barrier, the noise reduction effect is close to that of the 3.15m metal sound barrier, the problem that the height of the sound barrier is increased due to the requirement of the noise reduction effect is solved, and the landscape effect is better.
Drawings
Fig. 1-4 are schematic structural views of four embodiments of the noise reduction structure for a high-speed railway according to the invention.
Wherein:
1. a protective wall; 2. a railway track; 3. a railway building clearance; 4. a wheel rail; 5. a lower part of the train; 6. a pedestrian passageway;
7-10, respectively, a noise reduction structure 8a of 4 embodiments of the present invention, a first transverse and straight section; 8b, a vertical section;
8c. a second transverse straight section; 8d, an outer surface; bottom surface 8 e; inner surface 8 f; 9a. inner surface; 9b, upper surface;
9c, a vertical section; 9d, an inclined section; 10a, an arc-shaped inner surface; 10b, an arc-shaped outer surface;
Detailed Description
The noise reduction structure for high-speed railways of the invention is described in detail with reference to specific embodiments.
In the following examples, 2 is a railway track, a dotted line 3 is a railway construction limit, 4 is a wheel rail, 5 is a lower part of a train, and 6 is a pedestrian passageway.
Example one
As shown in fig. 1, a noise reducing structure 7 for a high speed railway extends along an outside of a track of the high speed railway for reducing noise outside a vehicle. The noise reduction structure is arranged on a protective wall 1, and the inner side of the noise reduction structure is 200cm away from the center of a track.
In detail, the section of the noise reduction structure 7 in the vertical direction is rectangular and is formed by extending the top of a protection wall upwards, the height of the rectangular section is 50cm, the width of the rectangular section is 20cm, and the top end of the inner side of the rectangular section is tightly attached to the railway building boundary 3.
Example two
As shown in FIG. 2, the noise reduction structure of the high-speed railway extends along the outer side of the high-speed railway track and is used for reducing noise outside a vehicle. The noise reduction structure is arranged above the protective wall 1, and the inner side of the bottom end of the noise reduction structure is 200cm away from the center of the track.
In detail, the section of the noise reduction structure in the vertical direction is in a step shape and is surrounded by a step-shaped top surface, an inner surface 8f, an outer surface 8d and a bottom surface 8e, the step-shaped top surface is formed by sinking the top surface from the inner side, the inner surface 8f is flush with the inner side of the protection wall, and the outer surface 8d is flush with the outer side of the protection wall; the bottom surface 8e is positioned at the top of the protective wall; the width of the first transverse straight section 8a of the stepped top surface is 10cm, the width of the second transverse straight section 8c is 10cm, and the height of the vertical section 8b is 15 cm; the overall height of the stepped structure is 65 cm. The inner ends of the two horizontal straight sections are tightly attached to the railway building boundary 3.
EXAMPLE III
As shown in fig. 3, a noise reduction structure for a high speed railway, which extends along a track of the high speed railway, is used for reducing noise outside a vehicle. The arc-shaped structure is installed above the protective wall, and the inner side of the bottom end of the noise reduction structure is 200cm away from the center of the track.
In detail, the section of the noise reduction structure in the vertical direction is arc-shaped, and the noise reduction structure is composed of an arc-shaped inner surface 10a, an arc-shaped outer surface 10b, a top surface and a bottom surface, wherein the arc-shaped inner surface and the arc-shaped outer surface are the same in height. The bottom surface is arranged on the protective wall, has the same width as the protective wall and is 20 cm. The width of the upper surface is 7 cm. The radius of the circular arc inner surface 10a is 332.1cm, and the radius of the circular arc outer surface 10b is 305.5 cm. The overall height of the arc-shaped structure is 100cm, the projection width of the outward inclined section of the arc-shaped structure is 19.8cm, and the upper end of the arc-shaped inner surface 10a is tightly attached to the railway building clearance 3.
Simulation analysis shows that when the running speed of the train is 300km/h, the noise reduction effect of the noise reduction structure at different typical sites is 4.1-5.7 dB (A), wherein sound absorption measures are not adopted, and the noise reduction effect is 4.1-5.2 dB (A); when the sound absorption measure is moderate, the noise reduction effect is 4.6-5.5 dB (A); and during high sound absorption measures, the noise reduction effect is 5.0-5.7 dB (A). Therefore, the influence of the sound absorption material is only within 1dB (A), and the noise reduction effect of the noise reduction structure of the embodiment is obvious.
Noise reduction effect at 1300 km/h of table
Example four
As shown in fig. 4, a noise reduction structure of a high speed railway bridge rail extends along an outside of a high speed railway track for reducing noise outside a vehicle. The noise reduction structure is arranged above a protective wall, and the inner side of the bottom end of the noise reduction structure is 200cm away from the center of a track.
In detail, the cross section of the noise reduction structure in the vertical direction is an elbow shape, and the noise reduction structure is composed of a lower rectangular structure and an upper outward-folded structure, wherein the width of the lower rectangular structure is 20cm, and the height of the lower rectangular structure is 46 cm. The inner surface 9a of the upper folded structure is formed by inclining the inner surface of the rectangular structure outwards, and the inclination angle is 30 degrees. The outer surface of the fold-out structure is formed by a vertical section 9c and an inclined section 9d, the inclined section 9d being parallel to the inner surface 9a. The outer and inner surfaces are connected by an upper surface 9b. The overall height of the angle-folded structure is 100cm, the projection width of the outward inclined section of the angle-folded structure is 19.8cm, and the upper end of the inner surface 9a of the outward folded structure is tightly attached to the railway building boundary 3.
The noise reduction structure can be integrally cast in place with the protective wall 1 in a pouring mode, or can be fixedly connected with the protective wall 1 after being prefabricated. The noise reduction structure is 40-125 cm away from the wheel rail 4 and the lower part of the train, so that a main noise source of the train can be effectively shielded. When the noise reduction structure is used for a new line, firstly, embedding a sleeve in the protective wall 1, and then connecting the noise reduction structure by using a bolt, or embedding and welding a steel plate; when the noise reduction structure is used for an existing circuit, holes are drilled in the protective wall 1, and chemical anchor bolts are embedded to connect the noise reduction structure.
Claims (10)
1. A noise reduction structure of a high-speed railway is characterized in that: the noise reduction structure is arranged on the bridge protection wall (1), extends along the outer side of the high-speed railway track and is positioned outside the railway building clearance (3),
the distance between one side of the noise reduction structure close to the track and the central line of the track (2) is 180-240 cm, and the distance between the noise reduction structure and the wheel track (4) and the lower part (5) of the train is 40-125 cm;
the cross section of the noise reduction structure in the vertical direction is of a rectangular structure (7), a stepped structure (8), a folded angle structure (9) or an arc structure (10).
2. The high-speed railway noise reduction structure according to claim 1, wherein: the arc-shaped structure (10) is defined by an inner surface (10a), an outer surface (10b), a top surface and a bottom surface, the inner surface (10a) and the outer surface (10b) are both arc-shaped, and the arc-shaped bending directions are consistent; the inner surface (10a) and the outer surface (10b) are connected through a top surface; the bottom surface is positioned on the protective wall (1) and is as wide as or slightly narrower than the protective wall (1); the inner surface (10a) is connected with the top surface and is positioned outside the railway building boundary (3).
3. The high-speed railway noise reduction structure according to claim 2, wherein: the height of the arc-shaped structure (10) is 20-100 cm, and the radius of the arc is larger than 20 cm; the width of the top surface is less than or equal to the width of the bottom surface.
4. The high-speed railway noise reduction structure according to claim 1, wherein: the stepped structure (8) is surrounded by a stepped top surface, an inner surface (8f), an outer surface (8d) and a bottom surface (8 e); the stepped top surface is formed by sinking from the top surface to the inner side and comprises a first transverse straight section (8a), a vertical section (8b) and a second transverse straight section (8c) which are sequentially connected from the inner side to the outer side, and the inner surface (8f) is coplanar with the inner side surface of the protective wall (1); and one ends of the first and second transverse straight sections close to the inner sides are positioned outside the railway building clearance (3).
5. The high-speed railway noise reduction structure according to claim 4, wherein: the height of the stepped structure (8) is 20-75 cm; the width of the first transverse straight section (8a) and the width of the second transverse straight section (8c) are both 5-15 cm, and the total width of the first transverse straight section and the second transverse straight section is less than or equal to the width of the protective wall (1).
6. The high-speed railway noise reduction structure according to claim 1, wherein: the inner surface of the rectangular structure (7) is coplanar with the inner side surface of the protective wall (1), and the width of the rectangular structure is less than or equal to that of the protective wall (1); the upper end of the inner surface of the rectangular structure is outside the railway building clearance (3).
7. The high-speed railway noise reduction structure according to claim 6, wherein: the height of the rectangular structure (7) is 20-50 cm, and the width of the rectangular structure is larger than 5cm and is not larger than the width of the protective wall (1).
8. The high-speed railway noise reduction structure according to claim 1, wherein: the angle-folding structure (9) comprises a lower rectangular structure and an upper outward-folding structure; the lower rectangular structure is as wide as the protective wall (1) or slightly narrower than the protective wall, and the height of the lower rectangular structure does not intrude into a railway building clearance (3); the inner surface (9a) of the upper folded structure is inclined outwards; the outer surface of the upper outward folding structure is composed of a vertical section (9c) and an outer inclined section (9 d); the vertical section (9c) of the outer surface is connected with the inner surface (9a) by an upper surface (9 b).
9. The high-speed railway noise reduction structure according to claim 8, wherein: the lower rectangular structure of the angle-folding structure (9) is 0-50 cm in height, the upper outward-folding structure is 20-100 cm in height, and the overall height of the angle-folding structure (9) is 20-100 cm; the included angle between the inner surface (9a) of the angle-folding structure (9) and the inner vertical surface is 90-180 degrees, and the included angle between the outer inclined section (9d) and the outer vertical surface is 90-180 degrees.
10. A high-speed railway noise reduction system which characterized in that: formed by a noise reducing structure according to any of claims 1-9 in combination with a sound barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713552.2A CN113969548A (en) | 2020-07-22 | 2020-07-22 | Noise reduction structure for high-speed railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713552.2A CN113969548A (en) | 2020-07-22 | 2020-07-22 | Noise reduction structure for high-speed railway |
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| Publication Number | Publication Date |
|---|---|
| CN113969548A true CN113969548A (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010713552.2A Pending CN113969548A (en) | 2020-07-22 | 2020-07-22 | Noise reduction structure for high-speed railway |
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| CN (1) | CN113969548A (en) |
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2020
- 2020-07-22 CN CN202010713552.2A patent/CN113969548A/en active Pending
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