正断层错动作用下浅埋地铁隧道受力分析方法及抗断设计研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (1) : 252-261.

土木工程

正断层错动作用下浅埋地铁隧道受力分析方法及抗断设计研究

郭文远1，李世民1，王志岗*2，高涛1,3，陶连金2，谢霖1，刘建功2，刘华南1

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Mechanical analysis method and anti-fracture design of shallow buried subway tunnels under normal fault dislocation

GUO Wenyuan1, LI Shimin1, WANG Zhigang*2, GAO Tao1,3, TAO Lianjin2, XIE Lin1,LIU Jiangong2, LIU Huanan1

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摘要

震害调查研究表明穿越活动断裂带隧道的破坏是极其严重的。本文以太原市城市轨道交通1号线一期工程区间隧道穿越交城断裂带为工程依托，通过Pasternak双参数地基模型建立力学分析模型并推导了正断层错动下地下管线纵向响应解析解，然后采用ABAQUS软件建立了三维精细化有限元模型。解析解计算结果与数值模拟计算结果吻合度较好，证明了解析解的正确性。最后，在设定的重点设防区域内采用节段衬砌+柔性接头组合形式，对比分析节段长度、接头纵向位置和柔性接头宽度对隧道结构整体减灾效果影响。结果表明：正断层错动下地下管线纵向响应的解析解计算结果可为重点设防区域的确定提供参考。采用节段衬砌+柔性接头组合形式可有效降低隧道结构的破坏程度和范围。正断层错动作用时，节段长度越短隧道结构破坏范围越小，柔性接头宽度的增加会降低隧道结构的破坏程度和范围，破坏区域集中在节段衬砌结构的端头部位。采用对缝模式设置柔性接头时可最大程度发挥接头的变形吸能作用，其减灾效果最优。研究可为穿越活动断裂带隧道工程采用节段+柔性接头组合形式的抗断设计和分析提供理论依据。

Abstract

Seismic research shows that the damage of tunnels crossing active fault zones is extremely serious. In this paper, based on the project of Taiyuan City Urban Railway Line 1 Phase I Project, the interval tunnel crossing the Jiaocheng fault zone, the mechanical analysis model is established by Pasternak two-parameter foundation model, and the analytical solution of the longitudinal response of the underground pipeline under the positive fault is derived, and then the three-dimensional refined finite element model is established by ABAQUS software. The results of the analytical solution are in good agreement with the numerical simulation results, which proves the correctness of the analytical solution. Finally, the combination of segmental lining and flexible joints in the key protection zone is used to compare and analyse the effects of segment length, longitudinal position of joints and width of flexible joints on the overall disaster reduction effect of the tunnel structure. The results show that the results of the analytical solution of the longitudinal response of the underground pipeline under the fault movement can provide a reference for the determination of the key protection zone. The combination of segmental lining and flexible joints can effectively reduce the degree and extent of damage to the tunnel structure. The shorter the length of the tunnel section, the smaller the area of damage; increasing the width of the flexible joint will reduce the degree and extent of damage to the tunnel structure, and the damage area will be concentrated in the end part of the segmental lining structure. When the flexible joints are installed in the butt joint mode, the deformation and energy absorption of the joints can be maximised, and the disaster reduction effect is optimal. The study can provide a theoretical basis for the design and analysis of the fracture resistance design of tunnel projects crossing active fault zones using the combination of segmental + flexible joints.

导出引用

郭文远1, 李世民1, 王志岗2, 高涛1, 3, 陶连金2, 谢霖1, 刘建功2, 刘华南1. 正断层错动作用下浅埋地铁隧道受力分析方法及抗断设计研究[J]. 振动与冲击, 2025, 44(1): 252-261

GUO Wenyuan1, LI Shimin1, WANG Zhigang2, GAO Tao1, 3, TAO Lianjin2, XIE Lin1, LIU Jiangong2, LIU Huanan1. Mechanical analysis method and anti-fracture design of shallow buried subway tunnels under normal fault dislocation[J]. Journal of Vibration and Shock, 2025, 44(1): 252-261

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