摘要
根据水位条件、施工工艺和防排水设计原则将隧道渗流计算围岩透水边界条件大致划分为4种类型,并分析了不同透水边界条件适应的施工工况。基于复变函数理论和保角映射方法,推导得出4种透水边界条件下隧道围岩内任一点孔隙水压力和隧道涌水量解析计算公式,通过与数值解的对比,印证了解析解的准确性。在此基础上,根据不同透水边界条件下隧道涌水量和围岩关键点孔隙水压力随埋深直径比(h/D)的变化规律,分析了透水边界条件的变化对浅埋隧道和深埋隧道的影响,并探讨了浅埋水下隧道渗流计算中透水边界条件的选取。相关结论与认识对于隧道渗流计算和排水设计具有一定的指导作用和参考价值。
Tunnel surrounding rock seepage boundary conditions can be roughly divided into four types based on water level, drainage design and construction approach, and the seepage boundary conditions to adapt to different construction conditions are discussed in detail. An analytical formula to calculate pore water pressure in tunnel surrounding rock and tunnel water inflow under four kinds of boundary conditions is obtained by adopting the method of conformal mapping of complex function. Comparison between analytical solution and numerical solution confirms the correctness of the analytical solution. Based on the relationship between tunnel water inflow with buried depth diameter ratio（ h/D）, as well as the relationship between surrounding rock pore water pressure and h/D under different boundary conditions, the influence of boundary conditions on shallow-buried tunnels and deep-buried tunnels is analyzed. Selection of boundary conditions for shallow-buried tunnel seepage calculation is also discussed. The conclusions for tunnel seepage calculation and drainage design reported in this article provide theoretical guidance for engineering practice.
作者
刘世伟
盛谦
朱泽奇
龚彦峰
崔臻
李建贺
张善凯
LIU Shi-wei;SHENG Qian;ZHU Ze-qi;GONG Yan-feng;CUI Zhen;LI Jian-he;ZHANG Shan-kai(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;HubeJ Provincial Engineering Laboratory for Underwater Tunnel,China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan,Hubei 430063,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2018年第11期4001-4009,共9页
Rock and Soil Mechanics
基金
国家重点基础研究发展计划(973)项目(No.2015CB057905)
国家重点研发计划(No.2016YFC0401803)
国家自然科学基金资助项目(No.51409263
No.51779253
No.41672319)~~
关键词
隧道围岩
地下水渗流
边界条件
孔隙水压力
涌水量
tunnel surrounding rock
groundwater seepage
boundary conditions
pore water pressure
water inflow
