摘要
某无压输水隧洞穿越一段白垩系泥岩段地层,极软岩,Ⅴ类围岩,采用数值模拟手段,对本围岩段静力状态下岩体在全断面开挖和上下台阶法开挖两种工况下,隧洞的围岩变形特性和支护结构受力进行分析研究,从而提出更为合理的开挖方法。
A free-flow water delivery tunnel section is accommodated in extremely soft V-class surrounding rock of Cretaceous system mudstone.Numerical simulation analysis was conducted to study the surrounding rock deforma⁃tion characteristics and force of supporting structure when rock mass in static state is excavated by full-section ex⁃cavation method or upper and lower bench excavation method,based on which more rational excavation method is proposed.
作者
秦国强
QIN Guo-qiang(Xinjiang Survey and Design Institute for Water Resources and Hydropower,Urumqi 830000,China)
出处
《广西水利水电》
2021年第1期68-72,80,共6页
Guangxi Water Resources & Hydropower Engineering
关键词
输水隧洞
白垩系
极软岩
全断面开挖法
上下台阶开挖法
数值模型
Water delivery tunnel
Cretaceous system
extremely soft rock
full-section excavation method
upper and lower bench excavation method
numerical model
