摘要
渗流作用影响边坡的稳定性.运用商业有限元软件的自带模块,根据节点的水头值和高程的比较模拟自由面和渗透场,计算单元的渗透力,以渗透力代替周边孔隙水压力施加于坡体单元上,然后采用强度折减法进行渗流作用下的边坡稳定分析.算例表明,该方法分析边坡的渗流及稳定是可行的,得到的结果较有效.渗流作用下,边坡的安全系数降低,坡脚的等水头线分布比较密集,渗透力比较集中,发生渗透破坏的可能性比其他地方大.
Slope stability is affected by seepage. By using commercial finite element software own module, the free-surface and seepage field has been simulated by comparison of the water head and elevation. The seepage force,instead of the pore-pressure around soil element is imposed at each node of the seepage field. Fi- nally, the stability of soil slope under seepage is studied with the strength reduction finite element method. An example is given to show the reliability of it. The seepage forces have concentrated at the foot of the slope where is prone to damage; and the safety factor has reduced under seepage.
出处
《三峡大学学报（自然科学版）》
CAS
2009年第3期15-17,21,共4页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金资助项目(30371555)
温州市水利管理处科技项目(2006547613)
关键词
渗流
边坡稳定
有限元强度折减法
安全系数
seepage
slope stability
strength reduction finite element method
safety factor
