CN103670436B - Railway Tunnel hole lateral straps formula sonic boom controls structure - Google Patents
Railway Tunnel hole lateral straps formula sonic boom controls structure Download PDFInfo
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- CN103670436B CN103670436B CN201310634411.1A CN201310634411A CN103670436B CN 103670436 B CN103670436 B CN 103670436B CN 201310634411 A CN201310634411 A CN 201310634411A CN 103670436 B CN103670436 B CN 103670436B
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- tunnel
- band
- sonic boom
- buffer structure
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of Railway Tunnel hole lateral straps formula sonic boom and control structure, at the outer buffer structure building 15-22m length with the form of open cut tunnel of Tunnel; The area of the section of buffer structure is identical with tunnel cross-section area; Buffer structure bilateral symmetry arranges two small one and large one shapes as the vertical openings of band, i.e. the first strips A and the second band B; First strips A distance open cut tunnel entrance 4-6m, it is 1.5-2.0m along tunnel longitudinal length; Second band B is 1.5-2.0m along tunnel longitudinal length, and the spacing between two bands is 6-9m, the second band distance tunnel portal 2-3m.Sonic boom of the present invention controls to there is higher alleviation micro-pressure wave efficiency, obviously reduces the barometric gradient of compressional wave, increases the ride comfort of passenger, greatly reduces the sonic boom effect that bullet train access tunnel produces, reduce the harm to surrounding environment.
Description
Technical field
The present invention relates to railway tunnel, particularly a kind of high-speed railway is arranged on the micro-pressure wave absorbing structure of tunnel portal.
Background technology
China has entered high-speed railway Rapid development stage, the operation of the High-speed Passenger Dedicated Lines such as Beijing-Tianjin inter-city, Zheng Xi, Wu Guang, shows that China Express Railway construction technique level has entered world's rank of advanced units.In high speed railway construction, solve an a series of difficult problem, the pneumatic sonic boom phenomenon that high-speed railway is brought out by tunnel, be one of problem that will solve.This sonic boom is because the compressional wave that tunnel produces charged into by train, propagate arrive tunnel exit place time, to a kind of low-frequency noise ripple---the micro-pressure wave of tunnel exit surrounding area radiation, meanwhile, cause the window frame in neighbouring house, shutter etc. sharply to vibrate.This phenomenon can affect greatly tunnel exit surrounding environment, and, environment-friendly type high-speed railway green with construction is runed counter to, and therefore must effectively be controlled.
Pressure gradient (pressure differential in the unit interval) when the size of micro-pressure wave and compressional wave arrival tunnel exit is directly proportional, and by controlling barometric gradient during compressional wave arrival tunnel exit, can realize the object slowing down micro-pressure wave intensity.At present, the technical measures slowing down micro-pressure wave taked at tunnel portal of Railway Tunnel are several as follows:
One, outside Tunnel, build uniform section top or sidepiece conventional open formula absorbing structure;
Two, outside Tunnel, build expansion basal area type absorbing structure;
Three, near tunnel portal, loop type decompression configuration etc. is built.
These tunnel portal ancillary facilities serve larger effect in alleviation sonic boom noise.But also exist following not enough: no matter be top or side mouth, A/F is all less, in order to obtain larger aperture area, the length lengthening hole external structure must be needed, cause the wasting of resources.
In addition, opening is arranged on top, easily occurs the danger such as falling rocks, harm traffic safety.
Summary of the invention
In view of the above deficiency of prior art, the present invention aims to provide the structural form that sonic boom is slowed down at a kind of Railway Tunnel hole, enable to adopt shorter structure length, reduction bullet train enters the micro-pressure wave that tunnel produces effectively, and construction is easy, construction cost is low.
Object of the present invention is realized by following means.
Railway Tunnel hole lateral straps formula sonic boom controls structure, it is characterized in that: at the outer buffer structure building 15-22m length with the form of open cut tunnel of Tunnel; The area of the section of buffer structure is identical with tunnel cross-section area; Buffer structure bilateral symmetry arranges two small one and large one shapes as the vertical openings of band, i.e. the first strips A and the second band B; First strips A distance open cut tunnel entrance 4-6m, it is 1.5-2.0m along tunnel longitudinal length; Second band B is 1.5-2.0m along tunnel longitudinal length, and the spacing between two bands is 6-9m, the second band distance tunnel portal 2-3m.
The present invention's structure is compared with existing conventional buffer structure, the efficiency alleviating micro-pressure wave is higher, significantly reduces the barometric gradient of compressional wave, increases the ride comfort of passenger, greatly reduce the sonic boom effect that bullet train access tunnel produces, reduce the harm to surrounding environment.The vertical openings space of form of structure is comparatively large, and open cut tunnel entire length is shorter, obviously can reduce construction investment, and has and build advantage easily.The present invention adopts lateral straps formula opening, can reduce because normal header opening buffer structure brings " falling rocks " dangerous to a great extent, the liftoff 2-3m of Article 2 band simultaneously, can avoid hillside Rolling Stone, mud-rock flow and the disaster brought.
Accompanying drawing illustrates:
Fig. 1 is that railway tunnel lateral straps formula sonic boom of the present invention controls structural texture schematic diagram.
Fig. 2 is that the present invention compares with the numerical simulation relation curve of time with the pressure gradient of measuring point in prior art structure under the same conditions tunnel.Abscissa is the time, unit is second (s), and ordinate is barometric gradient, unit is kPa/s.Wherein curve D is the calculated curve of the tunnel portal that commonsense method is built, and curve F is the calculated curve of the tunnel portal that the present invention builds.Concrete design conditions are speed of a motor vehicle is 350km/h, and tunnel area is 100m
2, train area is 11.6m
2.
Fig. 3 is the schematic diagram that the structural form of sonic boom is slowed down at railway tunnel hole of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, enforcement of the present invention is further described.But it is emphasized that embodiment is below exemplary, instead of in order to limit the scope of the invention and apply.
As shown in Figure 1, a specific embodiment of the present invention.
Outside Tunnel, build the buffer structure that 15-22m is long, the area of the section of buffer structure is identical with tunnel cross-section area.Buffer structure is symmetrical arranged two strip-type openings, first strips A distance entrance 4-6m, it is 1.5-2.0m along tunnel longitudinal length, and the second band B is 1.5-2.0m along tunnel longitudinal length, spacing between two bands is 6-9m, second band distance tunnel portal 2-3m.Article 1, with ground, hoop length is 9-10m; Article 2 band is liftoff 2-3m, hoop length is 3-4m.
As seen from Figure 2: when tunnel portal adopts the inventive method to build (curve F), the peak value of pressure gradient near tunnel exit place in tunnel is 6.8kPa/s; And hole is without (curve D) during buffering, when other condition is all identical, the peak value of pressure gradient of identical measuring point is 13.7kPa/s; The tunnel that the inventive method is built is going out hole place, and peak value of pressure gradient comparatively existing tunnel reduces by 50.3%.Because barometric gradient is directly proportional to micro-pressure wave peak value, therefore, High-speed Railway Tunnel Exit Micro-pressure Wave peak value is also by reduction about 50.3%, and its effect of easing stress is remarkable.
Claims (1)
1. Railway Tunnel hole lateral straps formula sonic boom controls structure, it is characterized in that: at the outer buffer structure building 15-22m length with the form of open cut tunnel of Tunnel; The area of the section of buffer structure is identical with tunnel cross-section area; Buffer structure bilateral symmetry arranges two small one and large one shapes as the vertical openings of band, i.e. the first strips A and the second band B; First strips A distance open cut tunnel entrance 4-6m, it is 1.5-2.0m along tunnel longitudinal length; Second band B is 1.5-2.0m along tunnel longitudinal length, and the spacing between two bands is 6-9m, the second band distance tunnel portal 2-3m; First strips A ground connection, hoop length is 9-10m; The liftoff 2-3m of second band B, hoop length is 3-4m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310634411.1A CN103670436B (en) | 2013-11-29 | 2013-11-29 | Railway Tunnel hole lateral straps formula sonic boom controls structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310634411.1A CN103670436B (en) | 2013-11-29 | 2013-11-29 | Railway Tunnel hole lateral straps formula sonic boom controls structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103670436A CN103670436A (en) | 2014-03-26 |
| CN103670436B true CN103670436B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310634411.1A Expired - Fee Related CN103670436B (en) | 2013-11-29 | 2013-11-29 | Railway Tunnel hole lateral straps formula sonic boom controls structure |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500088B (en) * | 2014-12-15 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Railway tunnel outlet partition plate formula buffer structure |
| CN104453938B (en) * | 2014-12-15 | 2017-10-13 | 中铁第四勘察设计院集团有限公司 | Railway tunnel Internal baffle type buffer structure |
| CN105952468A (en) * | 2016-06-30 | 2016-09-21 | 中铁西南科学研究院有限公司 | High-speed railway tunnel connecting open-cut tunnel with micro-pressure wave alleviation function |
| CN108868813B (en) * | 2018-06-27 | 2019-07-30 | 西南交通大学 | A kind of railway tunnel buffer structure |
| CN110107331B (en) * | 2019-05-17 | 2020-07-28 | 北京交通大学 | High-speed railway tunnel decompression method |
| CN110735649B (en) * | 2019-11-26 | 2024-05-17 | 广西大学 | Full automatically regulated's tunnel buffer structure |
| CN111322085B (en) * | 2020-03-19 | 2022-02-15 | 中南大学 | Railway tunnel capable of relieving pressure fluctuation inside tunnel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3003055B2 (en) * | 1991-03-06 | 2000-01-24 | 大成建設株式会社 | Dome to reduce shock wind pressure |
| JPH0842291A (en) * | 1994-07-29 | 1996-02-13 | Uchu Kagaku Kenkyusho | Tunnel structure |
| CN201106157Y (en) * | 2007-10-29 | 2008-08-27 | 中铁二院工程集团有限责任公司 | High-speed railway tunnel opening micropressure wave buffering establishment |
| CN201738254U (en) * | 2010-08-09 | 2011-02-09 | 中铁第一勘察设计院集团有限公司 | Buffering structure for buffering micro-pressure wave at high-speed railway tunnel portal |
| JP2012225010A (en) * | 2011-04-18 | 2012-11-15 | Railway Technical Research Institute | Soundproof device |
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- 2013-11-29 CN CN201310634411.1A patent/CN103670436B/en not_active Expired - Fee Related
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| CN103670436A (en) | 2014-03-26 |
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Granted publication date: 20150819 Termination date: 20171129 |