Shield tunnel structure anti-seismic safety evaluation method based on pattern recognition

Abstract

The invention relates to the technical field of tunnel engineering, in particular to a shield tunnel structure anti-seismic safety evaluation method based on pattern recognition. The method comprisesthe following steps: a, forming a characteristic space based on shield tunnel anti-seismic analysis theory practice data research and influence factor selection; b, setting a tunnel anti-seismic property requirement grade according to technical specification requirements, selecting a shield tunnel anti-seismic property index and establishing and calculating a shield tunnel anti-seismic safety evaluation result; c, applying shield tunnel seismic response finite element software under the condition of assignment of each type of influence factors, calculating seismic performance index values, determining a tunnel seismic safety evaluation result and constructing a knowledge base of a relation model of the influence factors, the safety evaluation indexes and the safety evaluation result; andd, adopting a mode identification method to obtain a tunnel structure anti-seismic safety evaluation result according to the real-time data of each influence factor in the shield tunnel operation period. The anti-seismic safety evaluation method for the shield tunnel structure is beneficial to improving the accuracy of the evaluation result.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a pattern recognition-based seismic safety evaluation method for shield tunnel structures. Background technique [0002] Earthquakes can cause huge loss of life and property. At present, during the rapid development of domestic subway construction and operation and maintenance technology innovation, the seismic research of shield tunnels has become a very urgent and important task for the earthquake resistance and disaster reduction of urban lifeline projects. For the seismic performance evaluation method of shield tunnels, the evaluation method based on fuzzy mathematics theory is generally used, and each risk factor is divided into groups such as risk evaluation, and then after weighted average processing, the seismic risk evaluation risk index of the tunnel body is obtained. The shortcomings of this type of method are: (1) Most of the factors affecting the seismic ...

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Problems solved by technology

The shortcomings of this type of method are: (1) Most of the factors affecting the seismic safety of tunnels are qualitative indicators, and the risk assessment and classification are carried out according to engineering experience. Performance indicators; (2) The seismic safety evaluation indicators and evaluation criteria of tunnels are not clearly expressed, and there is a lack of corresponding technical specifications and standards

[0003] Therefore, the evaluation results obtained by the rough processing of the existing methods will be relatively rough, and it is difficult to guarantee the reliability of the seismic safety evaluation results of the shield tunnel structure

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