Shield machine access hole connector processing structure and method thereof

Abstract

The invention relates to a shield machine access hole connector processing structure and a method thereof. As shield launching and receiving in a deep foundation pit under the special complicated geological condition has certain engineering risk, a post-poured externally-coated ring beam is constructed in a segmental lining and foundation pit range outwards from an outline of a shield access holeto the periphery to replace a traditional built-in ring beam structure. In order to disturb a access hole connector position and the periphery as little as possible and disassemble spliced duct piecesat the connector position as little as possible, the shield machine access hole connector processing structure disclosed by the invention utilizes an externally-coated ring beam type, so that bearingand sealing capacity of the spiced duct pieces and back grouting is given to full play; a balance stable structure system is utilized, the externally-coated ring beam is arranged based on the balancestable structure system to assist further receiving opening and connector sealing treatment, and structural safety and waterproof reliability at a shield machine access hole are ensured.

Description

technical field [0001] The invention belongs to the technical field of underground engineering construction, and in particular relates to a structure and a method for processing the interface of a shield tunnel entry and exit. Background technique [0002] With the continuous development of urban construction and infrastructure projects, there are more and more tunnels and underground projects. In the tunnel engineering implemented by the shield method, there are more and more cases where the shield tunnel uses the station end and shaft for origination and reception. [0003] When the surrounding environment is complex, the foundation pit of the shield machine is deep, the groundwater level is high, and the stratum is dominated by powdery and granular media, the interface treatment at the entrance and exit of the shield machine is also an important link that affects the quality of the project. The traditional method is to dismantle or chisel the outermost ring segment at th...

AI Technical Summary

Problems solved by technology

The traditional method is to dismantle or chisel the outermost ring segment at the interface of the entrance and exit, and set up a "built-in ring beam" to fill the vacancy at the interface. There will be certain safety risks in the formation, and it is easy to destroy the existing system balance state. In serious cases, it will induce accidents such as water gushing into the foundation pit and sand gushing. deal with

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