Method and device for determining safety state of shield machine tunneling based on construction parameters

Abstract

The present application relates to a method, a device, a computer device and a storage medium for determining the safe state of tunneling of a shield machine based on construction parameters. The present application can reduce the subjectivity caused by artificially judging the risk level, and improve the accuracy of judging the construction state of the shield machine. The method includes: classifying the state of shield tunneling based on the parameters of the tunnel passing through the stratum and the construction parameters of the shield tunneling machine, constructing a membership function corresponding to the level of the above shield tunneling state, and calculating various shield tunneling construction parameters using the membership degree function According to the evaluation matrix, the corresponding shield construction parameter weights of each shield construction parameter in each shield tunneling status level are determined, and each shield construction parameter is determined according to the shield construction parameter weight Confidence degrees belonging to the state levels of each shield tunneling are respectively calculated based on evidence theory to obtain multiple joint confidence function values, and the shield machine tunneling safety state level is determined according to the joint confidence function values.

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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