Structural design optimization method and device for underground station constructed by shield method

By constructing a three-dimensional finite element model and performing load reduction iterations, the structural design of underground stations constructed using the shield tunneling method was optimized, solving the problem of inaccurate simulation of the impact of openings in existing technologies and improving structural safety and economy.

CN121580487APending Publication Date: 2026-02-27SUZHOU RAIL TRANSIT CONSTRUCTION CO LTD +2
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Patent Information

Application Number
CN202511752359.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-26
Publication Date
2026-02-27

AI Technical Summary

Technical Problem

Existing technologies in the design of underground station structures using the shield tunneling method cannot accurately simulate the complex three-dimensional stress redistribution and local concentration effects caused by openings, resulting in deviations between the design results and the actual stress state of the structure, which may lead to insufficient structural safety or uneconomical use of materials.

Method used

By acquiring on-site geological survey data, a three-dimensional finite element model was constructed. Self-weight, temporary construction loads, and tunnel boring machine thrust were applied. Combined with radial and tangential springs to simulate stratum constraints, finite element analysis was performed to extract the maximum principal stress. Load reduction iterations were then carried out to optimize reinforcement design and enhance local shear resistance.

Benefits of technology

It enables precise quantification of the impact of openings on the stress distribution and deformation patterns of station structures, ensuring structural safety and stability, improving the safety and economy of the design, and reducing engineering costs.

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Abstract

The invention provides a structural design optimization method and device for an underground station constructed through a shield tunneling method, and belongs to the technical field of underground engineering.The method comprises the steps that site geological survey data of a station trepanning area are obtained and input into a three-dimensional finite element model, and an initial three-dimensional model is constructed; analyzing a dynamic load effect in a construction stage by combining a load reduction theory to obtain a target three-dimensional model; finite element analysis is carried out based on the target three-dimensional model, and the maximum principal stress of the edge of the opening is extracted; then comparing the maximum principal stress with the allowable stress of the material, and performing load reduction iteration under the condition that the maximum principal stress is greater than the allowable stress of the material to obtain a final load reduction coefficient; and taking the final load reduction coefficient, the trepanning center coordinate and the stress concentration factor as the input of a two-dimensional reinforcement model, generating an equivalent live load, calculating the reinforcement amount, and automatically realizing the reinforcement optimization design. The construction efficiency is improved and the engineering cost is reduced while the safety and stability of the structure are ensured.
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