CN109083656B - Railway tunnel lining structure with pneumatic effect relieving function - Google Patents
Railway tunnel lining structure with pneumatic effect relieving function Download PDFInfo
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- CN109083656B CN109083656B CN201811082431.1A CN201811082431A CN109083656B CN 109083656 B CN109083656 B CN 109083656B CN 201811082431 A CN201811082431 A CN 201811082431A CN 109083656 B CN109083656 B CN 109083656B
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- tunnel
- lining structure
- section lining
- air channels
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- 230000000694 effects Effects 0.000 title claims abstract description 25
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 5
- 238000012876 topography Methods 0.000 description 4
- 230000000116 mitigating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003454 tympanic membrane Anatomy 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
A railway tunnel lining structure with a pneumatic effect relieving function is used for effectively relieving pneumatic effects generated when a high-speed train passes through a tunnel, improving riding comfort and relieving influence on the internal and external environments of the tunnel. The tunnel lining structure comprises a tunnel opening section lining structure and a tunnel body section lining structure which is in butt joint with the tunnel opening section lining structure, longitudinally extending air channels are arranged in the tunnel opening section lining structure at intervals in the circumferential direction, the inner ends of the air channels close to the tunnel body section lining structure are communicated with the tunnel, and the outer ends of the air channels are led out of the tunnel.
Description
Technical Field
The invention relates to a railway tunnel, in particular to a railway tunnel lining structure with a pneumatic effect relieving function.
Background
When a high-speed train passes through a tunnel, a strong aerodynamic effect is generated, and the main expression modes of the effect are transient pressure in the tunnel, microwave air pressure at the tunnel opening and train wind in the tunnel. Transient pressure can cause discomfort in the eardrum pressure of the passenger, and the comfort level of the passenger is reduced; the tunnel portal micro-air pressure wave will cause explosion noise and endanger the tunnel portal building; train wind generated by train high-speed operation can threaten the safety of the working personnel to be avoided in the tunnel. Thus, it is important to mitigate aerodynamic effects that occur when trains are traveling at high speeds within a tunnel. At present, main measures for relieving the aerodynamic effect of a tunnel are to enlarge the section clearance of the tunnel, set a buffer structure of an entrance of the tunnel, set an auxiliary tunnel and the like. Enlarging the tunnel section can greatly increase engineering cost; the tunnel inlet buffer structure is arranged to have requirements on the topography condition outside the tunnel portal, and the tunnel inlet buffer structure does not have the arrangement condition in some cases; the arrangement of auxiliary tunnels is also limited by the topography of the tunnel portal and increases engineering costs. In order to overcome the shortcomings of the above measures, a technical solution needs to be sought from the tunnel structure itself.
Disclosure of Invention
The invention aims to solve the technical problem of providing the railway tunnel lining structure with the pneumatic effect relieving function, so that the pneumatic effect generated when a high-speed train passes through a tunnel is effectively relieved, the riding comfort is improved, and the influence on the internal and external environments of the tunnel is reduced.
The technical scheme adopted for solving the technical problems is as follows:
The invention relates to a railway tunnel lining structure with a pneumatic effect relieving function, which is characterized in that: the tunnel lining structure comprises a tunnel opening section lining structure and a tunnel body section lining structure which is in butt joint with the tunnel opening section lining structure, longitudinally extending air channels are arranged in the tunnel opening section lining structure at intervals in the circumferential direction, the inner ends of the air channels close to the tunnel body section lining structure are communicated with the tunnel, and the outer ends of the air channels are led out of the tunnel;
the air channels are circumferentially arranged on the arch wall section and the arch top section of the tunnel portal section lining structure at intervals;
the air channel is formed by a PVC pipe buried in the lining structure of the opening section, the section of the air channel is circular, and the diameter of the air channel is 0.5-1.0 m;
The length of the lining structure of the opening section extending from the opening into the opening is 30-50 m;
The thickness of the lining structure of the opening section is 1.0-1.5 m, and the thickness of the lining structure of the opening section is 0.40-0.55 m.
The tunnel portal lining structure has the beneficial effects that the inner end of the tunnel portal lining structure is provided with the air channels communicated with the tunnel at intervals in the circumferential direction, and the outer ends of the air channels are led out of the tunnel, so that aerodynamic effects generated when a high-speed train passes through the tunnel can be effectively relieved, transient pressure peaks in the tunnel and a carriage can be reduced, riding comfort can be improved, and meanwhile, the micro-air pressure peak value of the tunnel portal can be reduced, and the influence on the environment of an outlet of the tunnel can be reduced; the method is not limited by the topography condition of the tunnel portal, and has the advantages of convenient construction and low construction cost.
Drawings
The specification includes the following three drawings:
FIG. 1 is a longitudinal cross-sectional view of a railway tunnel lining structure with pneumatic effect mitigation function of the present invention;
FIG. 2 is a cross-sectional view of a railway tunnel lining structure with pneumatic effect mitigation function of the present invention;
fig. 3 is a schematic diagram of the working principle of a railway tunnel lining structure with pneumatic effect relieving function according to the present invention.
The figure shows the components, part names and corresponding labels: the tunnel portal section lining structure 11, the tunnel body section lining structure 12, the air passage 13 and the train L.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the railway tunnel lining structure with the pneumatic effect relieving function comprises a tunnel opening section lining structure 11 and a tunnel body section lining structure 12 which is in butt joint with the tunnel opening section lining structure, longitudinally extending air channels 13 are arranged in the tunnel opening section lining structure 11 at intervals in a circumferential direction, the inner ends of the air channels 13 close to the tunnel body section lining structure 12 are communicated with a tunnel, and the outer ends of the air channels are led out of the tunnel. The arrangement of the air channel 13 can effectively relieve aerodynamic effects generated when a high-speed train passes through a tunnel, reduce transient pressure peaks in the tunnel and a carriage, improve riding comfort, reduce tunnel portal micro-air pressure wave peaks and reduce influence on tunnel outlet environments. The pneumatic effect relieving structure is not limited by the topography condition of the tunnel portal, and is convenient to construct and low in construction cost.
Referring to fig. 1 and 2, the air passages 13 are circumferentially spaced apart in the arch wall section and the dome section of the tunnel portal segment lining structure 11. From the viewpoint of convenience in construction, the air channel 13 is formed by a PVC pipe buried in the lining structure 11 of the opening section, the cross section of the air channel 13 is circular, and the diameter of the air channel is 0.5-1.0 m.
Referring to fig. 1 and 2, considering the comprehensive aerodynamic effect relieving effect and the tunnel construction cost, the length of the tunnel opening section lining structure 11 extending from the tunnel opening into the tunnel is 30-50 m. The thickness of the opening section lining structure 11 is 1.0-1.5 m, and the thickness of the opening section lining structure 12 is 0.40-0.55 m. I.e. the opening section lining structure 11 is thickened in relation to the shaft section lining structure 12 to accommodate the added air channel 13.
Referring to fig. 3, when the train L enters the tunnel at a high speed, air compressed at the front of the train can enter the air channel 13 from the inner end of the air channel 13 at the opening, and flows out of the tunnel opening through the outer end of the air channel 13, so that the compression degree of the train L on the air in the tunnel is effectively reduced, the pressure transient amplitude is reduced, and the effect of relieving the pneumatic effect is achieved.
The foregoing is illustrative of the principles of a railway tunnel lining structure with aerodynamic effect relieving function of the present invention and is not intended to limit the invention to the specific structure and application scope shown and described, so that all possible modifications and equivalents may be resorted to, falling within the scope of the invention as defined by the appended claims.
Claims (1)
1. A railway tunnel lining structure with pneumatic effect relieving function is characterized in that: the tunnel lining structure comprises a tunnel opening section lining structure (11) and a tunnel body section lining structure (12) which is in butt joint with the tunnel opening section lining structure, longitudinally extending air channels (13) are arranged in the tunnel opening section lining structure (11) at intervals in the circumferential direction, the inner ends of the air channels (13) close to the tunnel body section lining structure (12) are communicated with the tunnel, and the outer ends of the air channels are led out of the tunnel;
the air channels (13) are circumferentially arranged on arch wall sections and arch crown sections of the tunnel portal section lining structure (11) at intervals;
The air channel (13) is formed by a PVC pipe buried in the tunnel portal section lining structure (11), the section of the air channel (13) is circular, and the diameter of the air channel is 0.5-1.0 m;
the length of the opening section lining structure (11) extending from the opening into the hole is 30-50 m;
the thickness of the tunnel portal section lining structure (11) is 1.0-1.5 m, and the thickness of the tunnel portal section lining structure (12) is 0.40-0.55 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811082431.1A CN109083656B (en) | 2018-09-17 | 2018-09-17 | Railway tunnel lining structure with pneumatic effect relieving function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811082431.1A CN109083656B (en) | 2018-09-17 | 2018-09-17 | Railway tunnel lining structure with pneumatic effect relieving function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109083656A CN109083656A (en) | 2018-12-25 |
| CN109083656B true CN109083656B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811082431.1A Active CN109083656B (en) | 2018-09-17 | 2018-09-17 | Railway tunnel lining structure with pneumatic effect relieving function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165253A (en) * | 2021-11-10 | 2022-03-11 | 中铁二院工程集团有限责任公司 | Double-layer gradually-changed hole buffer structure for tunnel portal of ultrahigh-speed railway |
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| JP2000080890A (en) * | 1998-09-03 | 2000-03-21 | Railway Technical Res Inst | Buffer work for reducing low frequency sound generated in tunnel entrance/exit |
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| CN109083656A (en) | 2018-12-25 |
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