Tunnel pressure relief structure

Abstract

The invention discloses a tunnel pressure relief structure. The tunnel pressure relief structure comprises hole buffer sections arranged at holes in the two ends of a tunnel and an air shaft buffer section arranged at an air shaft, wherein the cross section area of each hole buffer section is gradually reduced in the direction from a hole opening to the interior of the hole, the minimum cross section area of each hole buffer section is equal to the standard cross section area of the tunnel, the air shaft buffer section is in a spindle shape, the two ends of the air shaft buffer section communicate with the tunnel, the minimum cross section area of the spindle-shaped air shaft is equal to the standard cross section area of the tunnel, and the air shaft communicate with the middle part of the air shaft buffer section. The tunnel pressure relief structure can effectively reduce pressure changes caused in the listing driving process, and passengers or drivers are prevented from feeling uncomfortable.

Description

technical field [0001] The invention belongs to the technical field of tunnel structures, and in particular relates to a tunnel pressure relief structure. Background technique [0002] With the subway projects blossoming all over the country, the mileage of a subway line is getting longer and longer, and the speed of trains is constantly increasing. There are lines with speeds of 100km / h and 120km / h. For example, from the shield tunnel to the buried section directly to the outside, or the shield tunnel directly to the piston tuyere of the intermediate air shaft, because of the sudden change of the section along the air wave, the pressure changes significantly, which is likely to cause passengers and The driver's ears are uncomfortable. Generally, the subway line adopts 5.4-meter shield tunnel and integral ballast bed with long pillow embedded, and the intermediate air shaft is set in the interval tunnel tracked by two trains in the same interval. The position of the middle...

AI Technical Summary

Problems solved by technology

The construction cost of an intermediate air shaft is about 8 million, which is extremely high cost, and because the subway lines are located in the urban area, the land is in short supply, and it is generally impossible to choose the best location for the air shaft. Will consider setting up intermediate wind shafts, and combine multiple settings with shield shafts

Every time the tunnel section increases by one level, the related cost will skyrocket, so this option will not be chosen

And because of the tight construction schedule of the subway, few people consider how to reduce the pressure change rate.

However, in actual operation, complaints from passengers are often received. If the pressure change rate is not solved properly, it will affect the physical and mental health of passengers and drivers.

[0005] Therefore, need a kind of new technology to solve the problem that air pressure change causes personnel's ear discomfort in the prior art

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