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Multi-parameter real-time monitoring method and system for synchronous grouting behind segment wall of shield tunnel

A technology of shield tunnel segment and real-time monitoring system, which is applied in the application of fluid pressure measurement by optical method, the measurement of the change force of the optical properties of the material when it is stressed, and the measurement device, etc., which can solve the problem of grouting dissatisfaction, Segment cracking, large slurry and other problems, achieve the effect of flexible and convenient layout and reduce on-site wiring

Active Publication Date: 2013-05-29
NANJING UNIV +1
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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 grout, 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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  • Multi-parameter real-time monitoring method and system for synchronous grouting behind segment wall of shield tunnel
  • Multi-parameter real-time monitoring method and system for synchronous grouting behind segment wall of shield tunnel
  • Multi-parameter real-time monitoring method and system for synchronous grouting behind segment wall of shield tunnel

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Embodiment Construction

[0023] The specific implementation process of the technical solution of the present invention will be described below in conjunction with a specific example, and the present invention will be further described in detail, but the application of the present invention is not limited thereto.

[0024] The present invention is a multi-parameter real-time monitoring method and system for synchronous grouting behind the segment wall of a shield tunnel based on fiber grating sensing and optical fiber communication. The specific implementation includes the following implementation steps:

[0025] 1) Install the fiber grating sensors such as thermometers, concrete strain gauges, steel bar gauges, soil pressure gauges, osmometers, etc. at the control points of the segments before concrete pouring of the prefabricated segments, and pre-embed various sensors in the segments after pouring the concrete for curing Inside.

[0026] 2) After the segments are installed in place, lead out the pig...

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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...

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Application Information

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IPC IPC(8): G01B11/16G01K11/32G01L1/24G01L11/02G01K11/3206
Inventor 张巍王霆孙可徐玉桂李慧鑫罗志成丁蓬莱戴小玉施斌
Owner NANJING UNIV
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