Reinforced warehouse-filling cutter-replacement construction method in shield tunneling machine warehouse

Abstract

The invention provides a reinforced warehouse-filling cutter-replacement construction method in a shield tunneling machine warehouse. The method comprises the following steps: the first step: grouting a soil warehouse with bentonite slurry; the second step: replacing muck and slurry in the soil warehouse with air; the third step: filling gaps under pressure; the fourth step: connecting sleeve valve tubes; the fifth step: grouting cement mortar to backfill the soil warehouse; the sixth step: injecting an accelerator into cement mortar at the front part of the soil warehouse, and injecting a retarder into cement mortar at the rear part of the soil warehouse; the seventh step: cleaning up the soil warehouse for cutter replacement; the eighth step: recovering tunneling. With the adoption of the method provided by the invention, the difficult pre-grouting construction operation is avoided, the situation that equipment is damaged due to hardening of cement mortar in a screw conveyer is prevented, a grouting construction operation mode is defined, the difficulty of breaking and removing hardened bodies in the soil warehouse is reduced, the workload for cleaning up the warehouse is reduced effectively, the construction time is short, the efficiency is high and the safety is high.

Description

technical field [0001] The invention relates to a construction method in the technical field of tunnel engineering, in particular to a construction method for filling and changing tools for reinforcement in a shield machine chamber. Background technique [0002] At present, the construction of subway tunnels at home and abroad is developing rapidly, and these subway tunnels need to be constructed by the shield method. Shield tunneling has developed rapidly in many cities due to its advantages of safety, high efficiency and high degree of mechanization. The earth pressure balance shield method is a fully mechanical construction method commonly used in shield tunneling construction. It uses an earth pressure balance shield machine to cut the soil through the cutter head in front of the shield machine and pass the muck through the screw conveyor. After being transported out of the tunnel, the shield machine is pushed forward under the support of the casing and segments. Durin...

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Problems solved by technology

[0004] Aiming at the defects in the prior art, the object of the present invention is to provide a construction method for filling and changing tools for reinforcement in the shield machine chamber, which overcomes the inability of the ground to be reinforced, the poor gas retention capacity of the sand layer, and the injection The grout mouth is easy to block, the grouting construction method is not clear, it is difficult and time-consuming to break the hardened cement mortar in the process of clearing the warehouse, and the advanced grouting reinforcement construction is difficult and the workload is heavy. Safe tool change construction of earth pressure balance shield machine

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