A method for monitoring and early warning of large diameter shield tunnel deformation

Abstract

The invention relates to a large-diameter shield tunnel deformation monitoring and warning method. The method is characterized by comprising the following steps: (S1) according to the practical parameters of a large-diameter shield tunnel, obtaining a deformation reckoning relation by a numerical simulation method, and calculating the position with maximum segment inclination change, wherein the position is used as a priority mounting position of an inclination sensor; (S2) setting a transverse deformation control value; (S3) mounting the inclination sensor and a warning device, wherein the inclination sensor and the warning device are connected with a data processor respectively; (S4) according to the inclination sensor data, reckoning the transverse deformation on the horizontal diameter position of the tunnel; and (S5) comparing the transverse deformation with the transverse deformation control value by the data processor; and if the transverse deformation is greater than the transverse deformation control value, warning by the warning device. Compared with the prior art, the method provided by the invention has the advantages of good detection result, long-term monitoring and the like.

Description

technical field [0001] The invention relates to the technical field of deformation monitoring and early warning of large-diameter shield tunnels, in particular to a deformation monitoring and early warning method of large-diameter shield tunnels. Background technique [0002] With the improvement of my country's urban modernization level and the acceleration of people's life rhythm, traffic congestion in big cities has increasingly attracted the attention of all walks of life. Because the viaduct seriously affects the urban landscape, and the cross-river and sea-crossing bridge affects shipping and the water environment of the original site, large-diameter shield tunnels are increasingly favored by the traffic construction of large cities. At the same time, the problems facing the healthy service of the built tunnels have become increasingly prominent. Tunnel large deformation is the most common and typical tunnel structural disease. [0003] The degree of automation of de...

AI Technical Summary

Problems solved by technology

The shortcomings of this method are: 1. On the basis of assuming the segment as a rigid body, the relationship between the change of the inclination angle and the change of the diameter is established, without considering the influence of the deformation of the segment; 2. The determination of the sensor installation point does not consider the deformation of the segment impact, not optimized

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