【作者】 蒋中明； 张新敏；

【Author】 JIANG Zhongming ZHANG Xinmin (Institute of Geotechnical Engineering, Changsha University of science &technology, Changsha 410076 China)

【机构】 长沙理工大学岩土工程研究所；

【摘要】 隧道开挖不仅会对隧道周围的岩土体产生应力和变形扰动,同时也会对隧道周围的地下水环境产生严重的干扰,引起岩体内水分迁移和重分布。基于多孔介质力学理论,应用多孔介质饱和非饱和固液耦合分析方法研究了隧道开挖引起的隧道围岩应力变形环境和地下水环境的影响。实例研究表明开挖不仅会引起应力集中现象,同时也会引起孔隙压力局部范围内出现集中,导致岩体水分发生迁移的现象。隧洞围岩的孔隙水压力的重分布对核子元素扩散和围岩稳定安全性评价会产生不可忽视的影响。更多还原

【Abstract】 Excavation of tunnel changes not only the stresses and deformation of tunnel surrounding rock,but also disturbs the underground water environment in tunnel surrounding rock.Water migration happens due to variation of pore water pressure and redistribution.Based on the mechanics of porous media,saturated and unsaturated hydro-mechanical coupling analysis method is employed to study the variation of the stresses, deformation and pore pressure of the surrounding rock.Case study indicates that the excavation of tunnel will induce redistribution of stress and pore water pressure.Redistribution of pore water pressure will seriously affect on evaluation of surrounding rock stability and diffusion of nucleon in the pore water.更多还原