Multi-parameter real-time monitoring system for post-segment grouting of shield tunnel segment wall

Abstract

The invention discloses a method and system for monitoring a plurality of control parameters of a synchronous grouting process behind a segment wall during shield tunnel piercing construction in a fiber grating sensing and optical fiber communication mode. The method and system is mainly characterized in the remote and real-time multi-parameter monitoring, namely various fiber grating sensors which are pre-buried in segment control positions are used to perform remote and real-time monitoring on control parameters of pore water pressure, soil pressure, segment temperature, concrete stress, rebar stress and other control parameters in synchronous grouting process behind a segment wall, and the grouting pressure can be adjusted according to the monitoring data so as to ensure the grouting to be finished smoothly and ensure the grouting quality. The method and system is strong in practical applicability and feasibility, can monitor any link in the synchronous grouting construction behind the tunnel segment wall and can improve the controllability of the synchronous grouting process and the grouting quality.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering monitoring, and relates to a multi-parameter real-time monitoring method and system for the quality control of the synchronous grouting construction process behind the segment wall of a shield tunnel based on optical fiber grating sensing and optical fiber communication. Background technique [0002] Post-grouting of the shield tunnel segment wall is to fill an appropriate amount of grouting material with a certain early strength and final strength into the gap at the end of the shield according to a certain grouting pressure and grouting amount after the tunnel lining segment is assembled. , after it is consolidated and hardened, it fills the gap behind the wall, provides a certain bearing capacity and stabilizes the segment lining. It is a very important process in shield construction, which can actively reduce the adverse impact of ground settlement on the surrounding environme...

AI Technical Summary

Problems solved by technology

In the process of grouting behind the wall, there are often problems such as blocked pipes leading to insufficient grouting, serious loss of fluid slurry, excessive grouting pressure causing segment misalignment and even segment cracking, so synchronous grouting behind the wall Real-time monitoring is an important task to ensure the quality of grouting

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