Shield tunneling machine tunneling safety state determination method and device based on construction parameters

Abstract

The invention relates to a shield tunneling machine tunneling safety state determination method and device based on construction parameters, computer equipment and a storage medium. The subjectivity caused by manual judgment of the risk level can be reduced, and the accuracy of judgment of the construction state of the shield tunneling machine is improved. The method comprises the following steps: grading shield tunneling states based on tunnel crossing stratum parameters and shield construction parameters, constructing a partship function corresponding to the grade of the shield tunneling states, calculating the partship of each shield construction parameter by using the partship function, and constructing an evaluation matrix; according to the evaluation matrix, determining shield construction parameter weights corresponding to the shield construction parameters in the shield tunneling state grades; according to the shield construction parameter weights, determining confidence coefficients of the shield construction parameters belonging to the shield tunneling state grades, and obtaining a plurality of joint confidence coefficient function values through calculation based on the evidence theory; determining the tunneling safety state level of the shield tunneling machine according to the joint confidence function value.

Description

technical field [0001] The present application relates to the technical field of construction safety, in particular to a method, device, computer equipment and storage medium for determining the safety state of shield machine excavation based on construction parameters. Background technique [0002] With the progress of urbanization, the demand for urban underground space development continues to increase, and the construction of underground rail transit is developing rapidly. The shield tunnel construction method has gradually become the preferred method for the construction of urban underground rail transit due to its advantages such as low excavation speed, strong construction concealment, and automatic operation. [0003] During the tunneling process of the shield machine in complex strata, it may encounter failures such as tunnel mud and water gushing, special geological obstacles, cutterheads, severe tool wear, and failure of shield tail brushes, which will lead to del...

AI Technical Summary

Problems solved by technology

[0003] During the tunneling process of the shield machine in complex strata, it may encounter failures such as tunnel mud and water gushing, special geological obstacles, cutterheads, severe tool wear, and failure of shield tail brushes, which will lead to delays in the construction period and even cause ground damage. Severe construction safety accidents such as subsidence have caused great construction risks to engineering projects

Currently, the shield machine tunneling state risk assessment methods adopted to address these problems include the evaluation of objective factors such as the construction environment and hydrogeology through the expert evaluation method, which is subjective; in addition, the existing technology also uses multi-state dynamic fault The method of tree and Bayesian network is used to analyze the reliability of the cutter head and drive of the shield machine, so as to grasp the state of the construction system and effectively reduce the construction safety risk. However, the steps of this evaluation method are relatively complicated, and only the cutter head and drive are considered. Relevant parameters are used to judge the tunneling status of the shield machine, and the judgment of risk factors is not comprehensive enough

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