摘要
在运用抗剪强度折减有限元法对边坡系统的稳定性进行分析时,用等效面积的Drucker-Prager屈服准则如DP1、DP2、DP3等模型来模拟二维和三维边坡稳定状况,通过分析得出:三维稳定有限元分析可以较二维有限元更加真实地反映边坡的稳定状况,基于莫尔—库仑等效面积的DP3模型的计算比较真实,更好地发挥材料的承载潜力。并结合传统的极限平衡法,探讨了自重作用下对二维和三维边坡稳定的影响。在此基础上,还探讨了不同剪胀角对边坡稳定性的影响。文章可为边坡稳定加固设计提供一些参考。
By using the shear strength reduction method in the analysis on slope stability, different equivalent area Drucker - Prager yield criterion,such as DP1, DP2 and DP3 yield criteria,can give an approximate estimation of soil failure strength under two - and three - dimensional slope stability analyses condition, and some conclusions are drawn as follows：the three - dimensional finite ele- ment analysis conforms to more reality than two - dimensional finite element analysis. The calculation based on Mohr - Coulomb e- quivalent area DP3 model yields more actual result so as soil shear strength can be taken more advantage, and gives a better safety factor prediction for slope two - and three - dimensional stability analysis. With DP3 model, slope stability under self gravity is studied systematically. In this paper, we point out that different soil dilatancy angle has effective influence on slope stability too. It is helpful to give reference for the design of slope reinforcement.
出处
《矿产勘查》
2010年第2期185-190,共6页
Mineral Exploration
