Method for monitoring convergence deformation of tunnels

Abstract

The invention provides a method for monitoring convergence deformation of tunnels. A plurality of anchoring points are distributed annularly along a lining on a selected tunnel cross section and serve as monitoring reference points; every two of the anchoring points are connected through a rigid measuring installation arm with a standard length and a sliding sleeve successively, a tilter sensor is installed on the measuring installation arm, and a vibrating wire displacement meter is mounted between the measuring installation arm and the sliding sleeve; two free ends of a system component formed by the measuring installation arm, the sliding sleeve, and the tilter sensor and the vibrating wire displacement meter are anchored on two adjacent anchoring points on the lining through anchoring-point hinged support; and a plurality of the system components are formed in this way to be continuously catenated annularly till the unit number required by observation design is achieved. According to the method for monitoring convergence deformation of tunnels, the monitoring method is simple, the cost is low, the device occupies a small tunnel sectional area, and high-accuracy monitoring can be achieved.

Description

technical field [0001] The invention relates to a monitoring method, in particular to a tunnel convergence deformation monitoring method. Background technique [0002] With the acceleration of national infrastructure construction, the demand for safety monitoring of large-scale infrastructure projects such as subways, railways, highway tunnels, urban river-crossing tunnels, oil pipelines, and water conservancy culverts is increasing. At present, the safety monitoring of bridge and tunnel projects in the world mainly adopts the convergence deformation monitoring of the normal direction of the tunnel cross section, and the domestic preferred solution for the normal monitoring of the tunnel cross section is the mechanical steel rule convergence meter method (such as image 3 ), the steel ruler extensometer is a portable manual observation instrument with a fully mechanical structure. The structural principle is a linear superposition combination of a steel tape with mm graduati...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a tunnel convergence deformation monitoring method to solve the problems that the thickness of the lining affects the cross section of the tunnel, the data cannot be automatically collected and the traffic is affected, and the accuracy of the collected data is not high

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