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Buffer structure of double-track tunnel portal of high-speed rail

A double-line tunnel and buffer structure technology, which is applied in tunnels, mining equipment, earthwork drilling and mining, etc., can solve the problem that the buffer structure at the entrance of the tunnel cannot meet the pressure peak control standard of micro-pressure waves, so as to alleviate the phenomenon of micro-pressure waves and have a simple structure , strong applicability

Inactive Publication Date: 2013-04-03
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

[0003] However, when there are higher requirements for the environment near the entrance of the tunnel, for example, when there are buildings near the entrance of the tunnel, the existing buffer structure of the entrance of the tunnel cannot meet the strict control standard of micro-pressure wave pressure peak

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  • Buffer structure of double-track tunnel portal of high-speed rail
  • Buffer structure of double-track tunnel portal of high-speed rail
  • Buffer structure of double-track tunnel portal of high-speed rail

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Embodiment Construction

[0016] The present invention will be further explained below in conjunction with the drawings:

[0017] Such as Figure 1-3 As shown, the high-speed railway double-track tunnel portal buffer structure of the present invention is a rectangular cavity 1 with a rectangular cross section that is butted with the tunnel portal lining 4 and located outside the tunnel portal. The rectangular cavity 1 is located along the top of the rectangular cavity 1 at the tunnel entrance. Five openings, namely the first opening 5 to the fifth opening 9 are provided in the longitudinal direction. The area ratio of the total area of ​​the opening to the cross-sectional area of ​​the cavity lining is 30-90%, which can alleviate the micro-pressure wave effect of the cave to the greatest extent. The area of ​​each opening 3 arranged along the length direction of the rectangular cavity 1 gradually decreases by 50-90% toward the tunnel opening.

[0018] Preferably, the length of the rectangular cavity 1 at ...

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Abstract

The invention provides a buffer structure of a double-track tunnel portal of a high-speed rail. The buffer structure is characterized in that the buffer structure is used for the double-track tunnel of the high-speed rail and is a rectangular hole body lining and butting with the tunnel portal, the rectangular hole body is positioned at the outer side of the tunnel portal, and the cross section of the rectangular hole body is rectangular; one to five openings are arranged at the top part of the rectangular hole body in the length direction of the rectangular hole body, and the area ratio of the total area of the openings and the area of the hollow cross section of a portal lining is 30-90 percent; and the area of the openings arranged in the length direction of the rectangular hole body is gradually reduced to the tunnel portal direction according to 50-90 percent. The buffer structure can effectively relieve the micro-pressure wave phenomenon of the tunnel portal of the high-speed rail and prevents the sonic boom generated by the tunnel portal from generating bad influence on surroundings, and the social effect is significant. As the buffer structure has the advantages of simple structure, strong integrity, strong applicability to terrain and geological conditions and convenience in construction, the production cost caused by the buffer structure arranged at the portal can be effectively reduced, and the economic benefit is significant.

Description

Technical field [0001] The invention relates to the field of high-speed railway tunnels, in particular to a high-speed railway double-track tunnel opening buffer structure. Background technique [0002] When a high-speed train enters a tunnel, the space in front of the front of the car is restricted, which causes the air in front of the front of the car to not diffuse to the surroundings in time and is rapidly compressed to form air compression waves. The compression wave propagates to the tunnel exit at the speed of sound, about 90% of the energy is reflected back to the tunnel entrance in the form of expansion waves, and about 10% of the energy is radiated from the tunnel exit to the surrounding area in the form of pulse-shaped shock waves, forming micro pressure wave. Excessive micro-pressure wave effect will produce aerodynamic blasting noise, that is, tunnel sonic boom, and cause problems such as sudden vibration of nearby light structures (house windows), resulting in nois...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14
Inventor 赵文成肖明清王克金龚彦峰王长法李鸣冲王春梅李文胜靳宗振
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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