Method for allowing shield to pass through river-near air shaft

Abstract

The invention discloses a method for allowing a shield to pass through a river-near air shaft. The method comprises the following steps: 1) early-stage preparation; 2) installing a supporting frame; 3) pouring a foam concrete layer; and 4) shield passing through. Through the design of the supporting frame, the overall structural strength of the subsequently poured foam concrete layer is ensured, the foam concrete layer is not easy to deform or permeate outwards, the foam concrete is convenient to pour and mold, the supporting frame does not need to be disassembled subsequently, the supportingframe is maintained, a shield crossing area is formed by a supporting layer and the foam concrete layer, the subsequent shield can conveniently pass through the air shaft, the idle pushing phenomenonis avoided when the shield passes through the air shaft, the construction risk that the shield passes through the river-near air shaft is effectively reduced, when the shield is pushed and spliced into segments, the segments are conveniently and practically mounted, the segments are directly mounted on the tunnel wall formed by the foam concrete, and the lateral surfaces of the segments are limited by the foam concrete, so that the segments are not easy to deform transversely.

Description

technical field [0001] The invention relates to the field of subway engineering, in particular to a method for shield tunneling through a wind shaft near a river. Background technique [0002] With the gradual development of my country's economy, subway construction has become a symbol of urban modernization and civilization, expanding the space for urban development and accelerating the pace of urban development. Subway shield is an important construction technology in urban subway construction. With the gradual development of urban subways, subway tunnels are getting longer and longer. In order to ensure ventilation conditions, it is often necessary to add an intermediate air shaft in the middle of the tunnel. How safe is the shield machine? Fast, economical passing through the middle air shaft has also become a common problem at present. [0003] When the large-diameter shield tunnels through the wind shaft for a long distance, the shield has no side pressure, and the ne...

AI Technical Summary

Problems solved by technology

However, since the size of the wind shaft is usually different from that of the conventional shield tunnel, the bracket used for turnover and recycling cannot meet the construction requirements, and the bracket needs to be hoisted and dismantled in the later stage. It is easy to be damaged during the dismantling process, and the safety risk is high. long

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