Prediction method and device for composite stratum tunnel support parameters

By establishing a three-dimensional numerical model and using the Latin hypercube sampling algorithm, the Kriging Kriging model and the NSGA-III algorithm to predict and optimize the support parameters, the unreasonable support parameter design caused by the error of the formation parameter in the construction of composite formation tunnels is solved, and the accurate optimization of support parameters and the accuracy of tunnel structure safety evaluation is achieved.

CN119720621APending Publication Date: 2025-03-28CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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Patent Information

Application Number
CN202411301296.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-18
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

During the construction of composite strata tunnels, due to the complex geological environment, there may be errors in the survey results of the strata parameter, resulting in unreasonable design of support parameters, which may cause the deformation of surrounding rocks to not converge, serious damage to the support structure, waste of resources and cost losses.

Method used

The three-dimensional numerical model and the Latin hypercube sampling algorithm were used to sample and combine the support parameters and the relationship between tunnels and formations, and the three-dimensional numerical simulation calculation working condition grouping was established. The Kriging model was used to analyze the control effect, determine the sensitivity and influence weight of the support parameters, optimize the prediction model to obtain a nonlinear prediction function, and predict and optimize the support parameters through the NSGA-III algorithm.

Benefits of technology

Accurate optimization and prediction of support parameters is achieved, the accuracy of tunnel structure safety assessment is improved, and strong data-driven support is provided for decision-making of tunnel engineering under complex geological conditions, avoiding the problem of surrounding rock deformation and damage to support structure.

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Abstract

The invention relates to the technical field of tunnel excavation, in particular to a prediction method and device for composite stratum tunnel support parameters, and the method comprises the steps: obtaining three-dimensional numerical model calculation parameters; sampling and combining the support parameters and the relationship between the tunnel and the stratum to obtain a three-dimensional numerical simulation calculation working condition group; establishing a three-dimensional numerical model to obtain a control effect of surrounding rock deformation under each three-dimensional numerical simulation calculation working condition; determining the sensitivity of different support parameters to the control effect, and obtaining the influence weight of the different support parameters to the control effect; establishing a prediction model of the support parameters, and adjusting the calculation parameters of the three-dimensional numerical model to obtain a nonlinear prediction function of the support parameters; and predicting and optimizing the support parameters to obtain support parameters meeting preset conditions. Therefore, the problems of unstable surrounding rock, support damage, cost increase and the like caused by support design misalignment possibly caused by exploration errors caused by complex strata in related technologies are solved.
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