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<p>As a strategic national project, China’s high-speed railway construction will involve a large number of newly built 350 km/h railways traversing coal mine goaf areas. The prediction of tunnel deformation under the coupled effects of residual deformation in goaf zones, seismic loading, and train-induced dynamic loading, as well as the establishment of control standards and mitigation technologies for residual deformation, represent key technical challenges for newly constructed 350 km/h high-speed railway tunnels crossing mined-out areas. Based on the equivalent mining height principle, this study proposes a prediction method for residual deformation of goaf areas at high-speed railway tunnel sites using finite element simulation. The key techniques for simulating residual goaf deformation, seismic loading, and train-induced vibration loading are systematically analyzed. Considering the intrinsic rela-tionships among surrounding rock, foundation, tunnel structure, and track system, along with their respective deformation control standards, deformation control criteria for high-speed railway tunnels in goaf areas are established. Furthermore, principles and engineering schemes for residual deformation control across the planning, design, goaf treatment, and operation stages of high-speed railway tunnels are proposed. Taking the Tongluoshan Tunnel of the Chengdu–Dazhou–Wanzhou (Cheng-Da-Wan) high-speed railway as a case study, the pre-diction–control methodology is applied to evaluate tunnel sections influenced by residual deformation, and corresponding mitigation measures are recommended.</p>

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Prediction and Control Technology of Residu-al Deformation in Goaf Areas for the Site of a Newly Constructed 350 km/h High-Speed Railway Tunnel

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Xiao-yi Cao

摘要

As a strategic national project, China’s high-speed railway construction will involve a large number of newly built 350 km/h railways traversing coal mine goaf areas. The prediction of tunnel deformation under the coupled effects of residual deformation in goaf zones, seismic loading, and train-induced dynamic loading, as well as the establishment of control standards and mitigation technologies for residual deformation, represent key technical challenges for newly constructed 350 km/h high-speed railway tunnels crossing mined-out areas. Based on the equivalent mining height principle, this study proposes a prediction method for residual deformation of goaf areas at high-speed railway tunnel sites using finite element simulation. The key techniques for simulating residual goaf deformation, seismic loading, and train-induced vibration loading are systematically analyzed. Considering the intrinsic rela-tionships among surrounding rock, foundation, tunnel structure, and track system, along with their respective deformation control standards, deformation control criteria for high-speed railway tunnels in goaf areas are established. Furthermore, principles and engineering schemes for residual deformation control across the planning, design, goaf treatment, and operation stages of high-speed railway tunnels are proposed. Taking the Tongluoshan Tunnel of the Chengdu–Dazhou–Wanzhou (Cheng-Da-Wan) high-speed railway as a case study, the pre-diction–control methodology is applied to evaluate tunnel sections influenced by residual deformation, and corresponding mitigation measures are recommended.