敞开式TBM开挖隧洞围岩变形安全评价方法及应用
Research on safety evaluation method for surrounding rock deformation of open TBM excavation tunnel and application
刘登学 1孔勇斌 2寇甲兵 2黄书岭 1张雨霆1
作者信息
- 1. 长江科学院 水利部岩土力学与工程重点实验室,湖北 武汉 430010
- 2. 云南省滇中引水工程有限公司,云南 昆明 650000
- 折叠
摘要
当TBM开挖隧洞遭遇不良地质条件下的围岩大变形地质灾害时,通常会造成卡机或侵限等风险.开展TBM开挖隧洞围岩变形安全评价工作对降低卡机或侵限等风险具有重要的现实意义.通过分析敞开式TBM开挖隧洞围岩变形特点,建立了敞开式TBM开挖隧洞围岩变形安全评价方法.该方法通过采用三维数值分析和围岩变形现场监测手段,可获得围岩在护盾区间以及出露护盾后的变形,从而实现敞开式TBM开挖隧洞围岩变形安全性判别.在滇中引水工程香炉山隧洞的工程应用表明,所提方法能够有效判别不同支护方案下的围岩变形安全性,从而为敞开式TBM开挖隧洞施工期支护方案实时调整提供依据.
Abstract
When excavating a tunnel by TBM encounters geological disasters,such as large deformation,it usually poses risks such as jamming or limit intrusion.The research on safety evaluation of surrounding rock deformation during TBM excavation has an important practical significance in reducing the risk of jamming or limit intrusion.This paper analyzed the deformation charac-teristics of open TBM excavation tunnels,and established safety evaluation indicators and methods for deformation of open TBM excavation tunnels.By using three-dimensional numerical simulation and on-site monitoring of deformation,the deformation of surrounding rock in the shield zone and after the shield can be obtained,so we can achieve safety discrimination of deformation in open TBM excavation tunnels.Engineering applications in Xianglushan tunnel in Central Yunnan Water Diversion Project show that the proposed method can effectively identify the safety of deformation under different support schemes,thereby providing a ba-sis for real-time adjustment of support schemes during open TBM tunnel construction.
关键词
TBM/围岩变形/安全评价/卡机/侵限/香炉山隧洞/滇中引水工程Key words
TBM/surrounding rock deformation/safety evaluation/TBM jamming/limit intrusion/Xianglushan tunnel/Cen-tral Yunnan Water Diversion Project引用本文复制引用
基金项目
云南省科技重大专项(202002AF080003)
长江科学院创新团队项目(CKSF2021715/YT)
中央级公益性科研院所基本科研业务费专项(CKSF2021457/YT)
出版年
2024
国家科技期刊平台
NSTL
万方数据