Double air bag sealing device and sealing method for deep buried earth pressure balance shield tunnel entry

Abstract

The invention provides a double-airbag sealing device and a sealing method for a deep-buried earth pressure balance shield tunnel entry, including: a hole ring fixed on the outside of the shield tunnel entrance; after expansion, the hole ring and the shield tunnel are filled At least two high-pressure rubber airbags in the gap between the hole ring and the segment, at least two high-pressure rubber air bags are arranged side by side in the hole ring along the shield propulsion direction, and each of the high-pressure rubber air bags is connected to There is a medium filling pipeline, and the hole ring is provided with a filling channel for the medium filling pipeline to pass through; a rubber plate that expands with the expansion of the high-pressure rubber airbag, and the rubber plate cover is set on the high-pressure The outside and both sides of the rubber airbag are fixed with the hole ring. The sealing device of the present invention greatly reduces the risk of disturbance of the surrounding environment caused by the tunnel entry of the shield tunneling machine, and can realize safe tunneling of the shield tunneling tunnel under ultra-deep soil-covered or even highly pressurized water conditions.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a double-airbag sealing device and a sealing method for a deep-buried earth pressure balance shield tunnel entry. Background technique [0002] In Shanghai, Tianjin, Ningbo and other soft soil areas, the shield method has been used to construct subway interval tunnels and intake and drainage tunnels, and has accumulated rich practical and theoretical experience. One of the main problems to be solved is mainly manifested in: soil collapse, causing annular gap (shield shell and hole ring or segment and hole ring) flowing water and quicksand, shield machine kowtow, segment fragmentation and seam tension Opening, etc., will directly lead to soil subsidence, affect the surrounding environment, and even cause major accidents such as pipeline breakage and ground collapse. The existing technology mainly adopts soil reinforcement measures at the outer side of the working sh...

AI Technical Summary

Problems solved by technology

[0009] In view of the above situation, the present invention provides a double-airbag sealing device for deep-buried earth pressure balance shield tunneling and its sealing method, which solves many technical or operational deficiencies in existing shield tunneling sealing devices

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