Method for assessing immersed tunnel operation phase health state

Abstract

The invention provides a method for assessing an immersed tunnel operation phase health state. The method comprises steps that inductive analysis on the historical disease data of built immersed tunnels at home and abroad is carried out, and a health state assessment index system is established; a health state assessment model of an assessed immersed tunnel is established by utilizing a hierarchical analytical method; an improved hierarchical analytical method is employed to determine the relative weight of each factor and the weight of each assessment index contained in each factor relative to the factor; fuzzy comprehensive assessment ideas are integrated, and grade comprehensive assessment on the built immersed tunnel health state assessment model is carried out on the basis of preset tunnel health state assessment standards. According to the method, factors such as the environment factor of the immersed tunnel, structural stress, strain and cracks are comprehensively considered, quantitative comprehensive assessment on the immersed tunnel health state in an operation process is realized, and effective support is provided for operation maintenance and decision of the immersed tunnel.

Description

technical field [0001] The invention relates to a method for evaluating the health state of a tunnel structure during operation of an immersed tube tunnel. Background technique [0002] In recent years, with the continuous development of my country's economy, immersed tube tunnels are characterized by fast construction speed, short period, low requirements on foundation strength, shallow buried depth, no impact on navigation after completion, and shorter docking distance between the underwater tunnel part and the onshore part. Advantages such as shortness, etc., have been adopted more in cross-river tunnel schemes at home and abroad, and more than 100 immersed tube tunnels have been built all over the world. [0003] The research and investigation found that under the dual effects of the long-term natural environment and the use environment, the built tunnels will have lining cracks, deformation, water leakage and other diseases to varying degrees with use. These tunnel dise...

AI Technical Summary

Problems solved by technology

These tunnel diseases during operation not only endanger the safety and smoothness of high-speed traffic, but also affect the service life of the tunnel

If the disease is not treated in time, it will cause further damage and even destroy the tunnel, resulting in huge economic losses and adverse social impacts

[0004] Traditional structural degradation assessment standards can achieve semi-quantitative and semi-qualitative structural degradation assessments, and existing structural health assessment technologies can achieve quantitative assessments of institutional health status, which are more widely used in large bridges, high-rise buildings, shield tunnels and road tunnels There are also some scholars who have conducted research, but the application in the structure of immersed tube tunnels has not been published in the literature

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