A method and device for monitoring longitudinal settlement of tunnels based on wireless inclination sensors

Abstract

The invention relates to a tunnel longitudinal settlement monitoring method and device based on a wireless tilt sensor. The method includes: (1) laying a pipeline on a tunnel side wall longitudinally along a shield tunnel, and connecting the pipeline to the tunnel side wall at a same height fixedly at an interval of a first preset distance; (2) monitoring the forward movement of a trolley in the pipeline, when running a second preset distance each time, monitoring the trolley and measuring the tilt angle of the trolley's location to the horizontal plane, and transmitting the measured tilt angle data to a remote data analysis station through wireless transmission; and (3) performing analysis and processing on the received tilt angle data by the remote data analysis station so as to obtain a shield tunnel longitudinal settlement curve. Compared with the prior art, the method and device provided by the invention adopts a wireless sensor network to conduct data transmission, have no influence to tunnel limits on the cross section, can still perform monitoring during train operation, realize automatic, uninterrupted and fast wireless monitoring on tunnel longitudinal settlement, and have the advantages of simplicity, feasibility, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of tunnel longitudinal settlement monitoring, in particular to an uninterrupted and fast shield tunnel longitudinal settlement monitoring method and device based on a wireless inclination sensor. Background technique [0002] my country's urban rail transit construction has developed rapidly but has a short history, and there is no consensus on the seriousness of the structural health service problem. As a major underground project, the underground structure of urban rail transit is located in complex stratum conditions, the surrounding environment is changeable, and the train running density is extremely high. Replacement will induce underground engineering disasters, thus putting forward extremely high requirements for the healthy service of urban rail transit underground structures. The health service problems of the underground structures of urban rail transit in operation have begun to emerge, and the ...

AI Technical Summary

Problems solved by technology

However, the static level is large in size and inconvenient to install. It is not suitable for areas with large height differences and will be affected by factors such as temperature, air pressure, and gravity anomalies. Manual leveling requires staff to enter the tunnel with the instrument, so it cannot To realize the all-weather monitoring of the tunnel during the operation period, it can only be used for the tunnel in the non-operating state, and the manual leveling measurement is time-consuming and labor-intensive, and the efficiency is low; the one-time investment of the electronic level is high, and the reuse rate is low

In recent years, people have studied the monitoring methods of longitudinal settlement of tunnels such as laser scanning method and fiber Bragg grating, but they also have some insurmountable shortcomings

Most of the methods such as laser scanning have relatively high cost of equipment and equipment. If a comprehensive inspection is to be carried out, the vehicle needs to be moved. The detection cycle along the entire length of the tunnel is long and the efficiency is low.

Distributed optical fibers and fiber gratings work through optical principles, requiring additional large-scale demodulation equipment, which increases additional costs

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