摘要
基于Biot固结理论,采用渗流-力学耦合模型,研究分析了粘弹性饱和土体中因开挖深埋圆形隧道而引起的周围土体的应力和位移场。假设衬砌和土体均为多孔介质,隧道处于半封闭状态,边界半透水。在拉普拉斯变换域中得到的应力、位移场和孔隙水压力解答,运用拉普拉斯数值逆变换得到数值计算结果,分析了隧道周围土体中应力、位移场及孔隙水压力的消散规律,讨论了隧道边界的渗透特性和土体的流变性质对应力、位移场以及孔隙水压力消散的影响。
Based on Biot's theory of consolidation, the stresses, displacements and pore pressure induced by a deep tunnel excavation in viscoelastic saturated soil are investigated in the Laplace transform domain using the coupled poro-mechanical model. The liner and the soil are assumed to be porous medium. The tunnel is partially sealed and the boundary of tunnel is partially permeable. Numerical results are obtained by inverse Laplace transformation and are used to analyze the distribution of stresses, displacement and pore pressure around the tunnel. The influence of permeability of the tunnel boundary and soil viscosity on the field of stresses, displacements and pore pressure is discussed.
出处
《工程力学》
EI
CSCD
北大核心
2004年第5期132-138,共7页
Engineering Mechanics
关键词
粘弹性
饱和土
圆形隧道
半透水边界
固结
Boundary conditions
Consolidation
Laplace transforms
Mechanical permeability
Numerical methods
Soil mechanics
Stress analysis
Viscoelasticity
