Method for detecting service performance state of shield tunnel structure

Abstract

The invention relates to a method for detecting the service performance state of a shield tunnel structure. The method comprises the steps of selecting two typical sections with different burial depths and different geological conditions in the longitudinal direction of a tunnel as detection sections; based on the tunnel burial depth, geological conditions and convergence deformation data, calculating foundation bed coefficient correction coefficients and tunnel structure safety coefficients corresponding to the two typical sections; respectively constructing prediction functions of minimum values of tunnel convergence deformation and tunnel structure safety coefficients; based on the two prediction functions, calculating convergence deformation and tunnel structure safety coefficient minimum values of other sections between the two typical sections in sequence, and judging the service states and safety levels of the other sections according to the tunnel structure safety coefficient minimum values of the other sections and preset service state judgment conditions. Compared with the prior art, the method has the advantages that the convergence deformation of all sections in the tunnel interval and the minimum value of the safety coefficient of the tunnel structure can be predicted, the detection efficiency can be improved, and meanwhile the reliability of the prediction resultcan be guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel structure performance detection, in particular to a method for detecting the service performance state of a shield tunnel structure. Background technique [0002] Due to the influence of geological conditions, construction quality and surrounding engineering activities, abnormal deformation, water leakage, lining cracking and other diseases of shield tunnels during its construction and operation period have become common problems, making the safety and durability of the tunnel structure gradually reduced. , in severe cases, it will threaten the safety of the structure and cause safety accidents. Therefore, in order to reasonably evaluate the service performance status and safety level of the shield tunnel structure, and to take targeted detection and rectification measures, it is necessary to establish a method that can quickly and reasonably evaluate the service status of the shield tunnel. [00...

AI Technical Summary

Problems solved by technology

[0007] However, due to the influence of detection efficiency and budget, the current tunnel health monitoring is usually arranged according to the section, and the service status can only be evaluated according to the monitoring data of the current section, and there is no corresponding detection method for the structural service status between the detection sections, resulting in It is impossible to effectively predict the service performance status of the tunnel in the entire section, and it is also impossible to accurately judge the safety level of each section, and further determine the possible dangerous sections in the section, which seriously hinders the promotion and implementation of operation and maintenance management measures

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