Existing subway structure stress deformation assessment method under urban tunnel proximity construction

By collecting multi-source data, dividing the geological zoning, dynamically inverting parameters, and constructing an early warning model, the problems of data dispersion and static parameters in the stress and deformation assessment of existing subway structures under close-proximity construction of urban tunnels were solved. This achieved accurate assessment and timely risk warning throughout the entire closed-loop process, ensuring construction safety.

CN121706339APending Publication Date: 2026-03-20WUHAN MUNICIPAL CONSTR GROUP +1
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Patent Information

Application Number
CN202511674049.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-14
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

In the assessment of stress and deformation of existing subway structures under close proximity construction of urban tunnels, the data is scattered, the ground parameters are static, and the whole process control is lacking, which leads to the deviation of the assessment results and the inability to provide timely warnings of risks.

Method used

Collect multi-source data, divide the stratigraphic zones and label parameter ranges, construct a three-dimensional basic database, dynamically invert stratigraphic parameters, combine real-time monitoring data to construct a stress-deformation prediction model, and set early warning thresholds to achieve a closed-loop evaluation throughout the entire process.

Benefits of technology

It enables precise assessment and dynamic control of the stress and deformation of existing subway structures, improves the timeliness and accuracy of assessment results, identifies risks in a timely manner, and ensures construction safety.

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Abstract

The invention discloses an existing subway structure stress deformation assessment method and system under urban tunnel proximity construction, and the method comprises the steps: collecting stratum physical and mechanical parameters, existing subway structure design parameters and tunnel construction key parameters of an urban tunnel proximity construction influence region, and carrying out the integration to form a three-dimensional basic database; the method comprises the following steps: arranging equipment at key monitoring points to collect and preprocess real-time data, establishing a three-dimensional geology-structure numerical model based on a database, constructing an inversion algorithm by taking the preprocessed data as a target function, dynamically inverting real-time stratum parameters, and updating the database. The method comprises the following steps: constructing a stress deformation prediction model by combining real-time stratum parameters, inputting parameters to solve stress and deformation values of structures in different construction stages, setting an early warning threshold according to safety levels and specifications, comparing and outputting early warning levels, calculating model errors regularly, and supplementing sample retraining to realize dynamic iterative optimization if the early warning levels exceed the range. And safety and stability of the existing subway structure during construction are effectively guaranteed.
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