Shield tunneling construction method and backfilling structure applied to method

Abstract

The invention relates to a shield tunneling construction method and a backfilling structure applied to the method. According to the method, a partition wall is arranged in a receiving well, a filling space is formed between the partition wall and the side wall where a tunnel portal is located, the filling space is backfilled with filling materials to form a supporting structure, the supporting structure is used for blocking the tunnel portal, then a shield tunneling machine breaks the tunnel portal, due to the fact that the tunnel portal is blocked through the supporting structure at the moment, water, sand and the like can be effectively prevented from rushing into the receiving well through a circular seam between the shield tunneling machine and the receiving well tunnel portal in the tunnel portal breaking process, when the shield tunneling machine is tunneled into the supporting structure, the supporting structure can be used for supporting the shield tunneling machine, and cost increase caused by arrangement of other types of supporting structures is avoided. The method and the backfilling structure can be applied to areas with poor geological conditions and dense buildings around the receiving well or vital communication lines, it is guaranteed that the shield tunneling machine safely goes out of the hole, external borrowing is avoided, the construction cost is effectively reduced, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a shield tunnel exit construction method and a backfill structure applied to the method. Background technique [0002] With the continuous development of urban rail transit and comprehensive utility corridors, there are more and more shield tunnel projects. In the construction of shield tunnels, when the shield machine arrives at the exit, if the station or work receiving the shield machine The well is located in the limestone stratum with developed karst caves, the water-rich sand stratum with deep burial depth, and the composite stratum at the junction of the above two strata. Water gushing and sand gushing may occur in the circular joints between the tunnels, leading to ground subsidence. If the situation is serious, it will lead to ground subsidence, damage to surrounding pipelines, and deformation of the formed tunnel, posing a huge safety risk. Contents...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of urban rail transit and comprehensive utility corridors, there are more and more shield tunnel projects. In the construction of shield tunnels, when the shield machine arrives at the exit, if the station or work receiving the shield machine The well is located in the limestone stratum with developed karst caves, the water-rich sand stratum with deep burial depth, and the composite stratum at the junction of the above two strata. Water gushing and sand gushing may occur in the circular joints between them, leading to ground subsidence. If the situation is serious, it will lead to ground subsidence, damage to surrounding pipelines, and deformation of the formed tunnel, posing a huge safety risk.

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