摘要
基于Biot固结理论,研究分析了饱和土体中半封闭压力隧洞问题,建立了压力隧洞的半封闭边界条件.通过对控制方程的解耦,得到了孔隙水压力的消散方程.在Laplace变换域中得到隧洞边界上作用轴对称荷载和流体压力条件下的应力、位移和孔隙水压力解答,考虑了土体和孔隙流体的压缩性.运用Laplace数值逆变换得到时域中的解.文末给出了算例,分析了隧洞的半封闭特性对应力、位移和孔隙水压力的影响.
Based on Biot's theory of consolidation, the pressure tunnel with partial sealing in saturated soil is investigated by developing the partial sealing boundary conditions. By uncoupling governing equations, the uncoupled dissipation equation of excess pore pressure is obtained. The analytical solutions of stress, displacement and pore pressure induced by axisymmetric loading and fluid pressure are derived in Laplace transform domain. In which the compressibility of fluid and soil are considered. Numerical results in time domain are obtained by Durbin's inverse Laplace transform. Examples are presented at the end of this paper to analyze the influence of the partial sealing property of tunnel on stress, displacement and pore pressure.
出处
《科技通报》
北大核心
2004年第1期45-50,共6页
Bulletin of Science and Technology
