Airtightness simulation device for shield tunnel segment joint with adjustable opening angle

Abstract

The present invention relates to an airtightness simulation device for a shield tunnel segment joint with an adjustable opening angle, which comprises an air pump, an airtight box, a test segment unit, two stressing units, an air pressure gauge and a terminal device. The test segment unit is arranged in the airtight box and divides the airtight box into an external air pressure chamber and an internal air pressure chamber. The air pump is connected with the external air pressure chamber; the air pressure gauge is installed in the internal air pressure chamber; and the terminal device is connected with the air pressure gauge. The test segment unit comprises two rotating segments, each of which is vertically mounted; one end of the rotating segment is connected with the inner wall of the airtight box through a rotary sealing mechanism; and the other end is connected with the other rotating segment through the segment joint. Each stressing unit is obliquely arranged. Compared with the prior art, the invention can be used to test the gas leakage data of the segment joint under the conditions of different opening angles with the indoor model test method when external high pressure gas acts on the shield tunnel segment joint model.

Description

technical field [0001] The invention relates to the field of shield tunnel segment testing and design, in particular to an airtight simulation device for shield tunnel segment joints with adjustable opening angle. Background technique [0002] The construction of subway tunnels and underground pipe corridors has increasingly become an important part of urban modernization. Tunnel engineering is widely carried out in various complex terrain and geological conditions, which puts forward higher requirements for the quality of tunnel engineering. As a common dangerous engineering condition, the high-pressure underground environment has an impact on tunnel segments that cannot be ignored. Segment joints are weak parts of the tunnel segment structure, and it is particularly necessary to test their relationship with airtightness. Due to the high cost and difficult operation of the full-scale research test, there is currently a lack of an effective device to study the relationship...

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