设计、施工、监测

串珠状溶洞位置对隧道围岩稳定的影响研究

  • 李小勇 ,
  • 袁峰 ,
  • 厉志 ,
  • 赵东阳 ,
  • 温元平
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  • 1.中电建铁路建设投资集团有限公司,北京 100000;
    2.中电建铁路建设投资集团重庆有限公司,重庆 401100;
    3.重庆城市交通开发投资(集团)有限公司,重庆 400015
李小勇(1990—),男,山西忻州人,硕士,高级工程师,主要从事轨道交通工程方面的工作及研究。E-mail:910627464@qq.com

收稿日期: 2025-06-04

  网络出版日期: 2026-06-23

基金资助

重庆市建设科技计划(城科字2024第5-3号);中国电力建设股份有限公司科技项目(DJ-ZDXM-2023-05);中国电建重庆轨道交通27号线土建工程科研项目(ZGDJ-CQGD27-GC-2024-003)

Effect of Beaded Karst Caves Location on Stability of Tunnel Surrounding Rock

  • Li Xiaoyong ,
  • Yuan Feng ,
  • Li Zhi ,
  • Zhao Dongyang ,
  • Wen Yuanping
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  • 1. PowerChina Railway Construction Investment Group Co., Ltd., Beijing 100000, P. R. China;
    2. PowerChina Railway Construction Investment Group Chongqing Co., Ltd., Chongqing 401100, P. R. China;
    3. Chongqing City Transportation Development & Investment Group Co., Ltd., Chongqing 400015, P. R. China

Received date: 2025-06-04

  Online published: 2026-06-23

摘要

岩溶隧道中因存在串珠状溶洞群这种特殊的空间结构,从而导致围岩应力应变场变得极为复杂,且在穿越施工过程中对围岩稳定性的影响未明晰。以重庆轨道交通27号线中梁山隧道为工程背景,基于已有的能量场可视化分析系统构建三维数值模型,探究了不同溶洞位置对隧道围岩稳定性的影响规律。结果表明:隧道右侧溶洞对围岩稳定性影响最为显著,其拱脚竖向位移突变幅度达50%,塑性区与溶洞区贯通;当溶洞位于正上、下方且间距为5 m时,塑性区未贯通;围岩能量演化显示支护结构周边弹性应变能呈负值释放,右侧溶洞导致耗散能密度贯通带形成;基于塑性区贯通判据提出串珠状溶洞安全防突厚度应大于5 m。

本文引用格式

李小勇 , 袁峰 , 厉志 , 赵东阳 , 温元平 . 串珠状溶洞位置对隧道围岩稳定的影响研究[J]. 地下空间与工程学报, 2026 , 22(3) : 995 -1002 . DOI: 10.20174/j.JUSE.2026.03.25

Abstract

The special spatial structure of karst tunnels is due to the existence of beaded caves, which leads to the complexity of the stress-strain field of the surrounding rock, and the influence on the surrounding rock in the process of traversing the construction is unclear. Taking the Zhongliangshan Tunnel of Chongqing Rail Transit Line 27 is taken as the background of the project, and a three-dimensional numerical model is constructed based on the existing energy field visualization and analysis system to investigate the influence of the different locations of the caves on the stability of the tunnel surrounding rock. The results show that: The right side of the tunnel cavern has the most significant influence on the stability of the surrounding rock, and the vertical displacement of its arch foot is up to 50%, and the plastic zone is connected with the cavern area; when the cavern is located in the upper and lower part of the tunnel and the spacing is 5 m, the plastic zone is not connected; The energy evolution of the surrounding rock shows that the elastic strain energy around the support structure is released in a negative value, and the right cavern results in the formation of the dissipative energy density through the band; Based on the plastic zone through the criterion of the bead-like cavern safety protection thickness, it is proposed to be a safe and safe protection against the breakout. Based on the plastic zone penetration criterion, it is proposed that the thickness of the safety anti-protrusion of bead-like cavern should be more than 5 m.

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