Subway tunnel structure safety assessment method

Abstract

The invention provides a subway tunnel structure safety assessment method, which is implemented according to the following steps: 1) considering the operability of the various index detections and the comprehensive thoroughness of describing the tunnel structure safety; based on the tunnel structure safety stress and deformation characteristics, determining the tunnel structure safety assessment index system; selecting six assessment indexes referred to as leaking water, longitudinal settlement, transverse convergence, slab staggering, cracks, and duct piece damage; 2) according to the currently available safety level classifying method, relevant codes and the tunnel stress and deformation control standards, determining the level classifying standards for the assessment indexes; 3) based on the arithmetic product scaling method, determining the index weight vectors; 4) collecting the on-site detection data of the six indexes; according to the index detection values, calculating the degree-of-membership vectors for the indexes and combining them into an degree-of-membership matrix; 5) according to the correlation of the indexes and the safety level of the indexes, performing the weight changing process; and 6) calculating the fuzzy comprehensive assessment vectors by the fuzzy comprehensive assessment principle, and determining the assessment result according to the maximum degree-of-membership principle.

Description

technical field [0001] The invention relates to the field of safety evaluation of tunnel structures, in particular to a fuzzy comprehensive evaluation method for the safety of subway tunnel structures with variable weight considering the influence of evaluation index correlation and evaluation index grades. Background technique [0002] With the further development of the national economy and the continuous acceleration of the urbanization process, the scale of the city will gradually expand, and urban rail transit has played an important role in the travel of citizens. In recent years, more and more subway projects have been built and put into use in major and medium-sized cities. However, with the passage of time, under the influence of various external environmental conditions, the structural properties of subway tunnels continue to develop and change, structural diseases continue to appear, and the durability of materials continues to decline until the safety and functio...

AI Technical Summary

Problems solved by technology

However, this method needs to collect a large number of experts in the same field for knowledge, and it is difficult to collect the knowledge of experts' personal experience.

[0015] The existing evaluation methods mainly have the following two problems: 1. Although experts and scholars at home and abroad have adopted various methods to comprehensively evaluate the factors that affect the safety of tunnel structures, they rarely consider the correlation between factors and Disclosure of prior art on the comprehensive evaluation of the impact of evaluation grades on weights

2. The weight of each factor needs to be used in the usual security assessment method. At present, the method of constant weight is usually used. In fact, the weight of each factor is not constant when it is in different states.

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