Self-bonding air bag sealing device

Abstract

The invention provides a self-bonding air bag sealing device. The self-bonding air bag sealing device comprises a steel casing ring, an internal pressure air bag and a guard plate, wherein, the steel casing ring is provided with an annular bottom plate, a sleeve is arranged on the periphery of the annular bottom plate, and the diameter of an inner ring surface of the sleeve is greater than that of peripheral surfaces of tunneling equipment and a tunnel segment structure; the internal pressure air bag is an annular air bag and is arranged in the inner ring surface of the sleeve; and the guard plate is an annular plate, is provided with an outer ring surface and an inner ring surface and is fixedly arranged on the inner ring surface of the sleeve, the section of the guard plate is in a U shape, the internal pressure air bag is clamped between the outer ring surface of the guard plate and the inner ring surface of the sleeve, and the diameter of the inner ring surface of the guard plate is smaller than that of the peripheral surfaces. The self-bonding air bag sealing device has the beneficial effects that during the traversing and removing process of the tunneling equipment, the guard plate tightly presses the shell of the tunneling equipment with the help of the internal pressure air bag so as to produce the sealing effect between the shell and tunnel segments, thus preventing the phenomena such as water leakage and mud leakage in holes.

Description

technical field [0001] The invention belongs to the technical field of building tunnel engineering construction, and relates to a sealing device for starting and arriving construction of a tunnel working well. Background technique [0002] The origination and arrival construction of tunnel working shafts is one of the main risks in underground engineering. In order to ensure the smooth and safe construction of the tunnel working well starting and arriving, it is necessary to seal the gap between the starting and arriving tunnel circle in the tunnel working well, the tunnel excavation equipment and the tunnel structure, so as to prevent the soil outside the tunnel working well circle from The soil and groundwater pour into the working well, causing the loss of soil and groundwater outside the working well, causing deformation and settlement of the surrounding strata and environmental damage. The existing tunnel working well origination and arrival construction generally incl...

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Problems solved by technology

[0003] The disadvantages of this kind of air bag sealing device for working well hole ring in practical engineering application are: it is difficult to ensure the flatness and smoothness of the shell surface of tunnel boring equipment, and the rubber air bag is very easy to be scratched and damaged when the working well starts and arrives for construction. If the air bag device is damaged or fails, problems such as water leakage and mud leakage in the working well pit circle are very likely to occur. It is very difficult to deal with it on site, and it is easy to cause engineering accidents

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