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。
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 characteristics 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 basis for real-time adjustment of support schemes during open TBM tunnel construction.
作者
刘登学
孔勇斌
寇甲兵
黄书岭
张雨霆
LIU Dengxue;KONG Yongbin;KOU Jiabing;HUANG Shuling;ZHANG Yuting(Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010,China;Central Yunnan Water Diversion Project Co.,Ltd.of Yunnan Province,Kunming 650000,China)
出处
《人民长江》
北大核心
2024年第6期182-187,共6页
Yangtze River
基金
云南省重大科技专项计划项目(202002AF080003)
长江科学院创新团队资助项目(CKSF2021715/YT)
中央级公益性科研院所基本科研业务费项目(CKSF2021457/YT)。
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
TBM
surrounding rock deformation
safety evaluation
TBM jamming
limit intrusion
Xianglushan tunnel
Central Yunnan Water Diversion Project
