摘要
从建立应力平衡方程、水连续性方程入手,采用Galerkin方法将各控制方程分别在空间域和时间域进行离散,开发出了一个用于分析饱和-非饱和岩土介质中水-应力耦合弹塑性问题的二维有限元程序。然后就一个假定的处于渗流场中的饱和-非饱和土体使用预应力锚杆的支护效果问题进行了模拟计算。结果表明,在有地下水赋存的饱和-非饱和条件下,预应力锚杆的作用主要体现在减少了土体中的塑性区,而对位移的约束依部位而异,其对渗流场的影响不大。
Firstly, the momentum equilibrium equation, the continuity equation for water and the elastoplastic matrix are established. Secondly, by using the Galerkin method all the governing equations are discretized in the space domain and in the time domain respectively; then a two dimensional FEM code for coupling hydro-mechanical elastoplastic analysis of saturated-unsaturated porous medium is developed tentatively. Through a numerical computation for the assumed coupled hydro-mechanical problem of prestressed bolting support in a saturated-unsaturated soil body located a seepage field, it is shown that under the saturated-unsaturated condition, the prestressed bolting decreases mainly the plastic zone in the soil body; its restraint action for displacements changes according to the soil positions; and its influence on sepage field is not obvious.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第2期233-237,共5页
Rock and Soil Mechanics
基金
国家自然科学基金项目(No.50578171)
国家自然科学基金重点项目(No.50239070)联合资助
