A method for analyzing the deformation impact of tunnels passing under existing railways in gravel strata

By combining strength reduction, collapse arch, and refined three-dimensional numerical calculation models, the deformation impact of shield tunnels passing under existing railways is analyzed, overcoming the limitations of existing technologies and realizing the safety and stability analysis of tunnel construction in gravel strata, thus ensuring the safety of railway operation.

CN115952578BActive Publication Date: 2026-05-26CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
Filing Date
2022-12-09
Publication Date
2026-05-26

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Abstract

This invention discloses a method for analyzing the deformation impact of a tunnel passing under an existing railway in gravelly strata. This method comprehensively analyzes the impact of a shield tunnel on an existing railway in gravelly strata by combining three calculation results: the overall safety factor of the tunnel obtained from a strength reduction numerical calculation model, the safety factor of the impact of the excavation of the later-built tunnel on the earlier-built tunnel obtained from a collapse arch numerical calculation model, and the deformation of the surrounding rock and the structural deformation of the adjacent existing railway and abutments obtained from a refined three-dimensional numerical calculation model. This method solves the problem of the limited experience of existing technologies and forms a complete set of analysis methods for the deformation impact of shield tunnels passing under existing railways in gravelly strata, thereby saving manpower and material resources.
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