边坡稳定性理论及其局限性

About Theories on Slope Stability and Their Limitations

边坡分析理论经过近几十年的发展,基本形成了完善的体系.较为典型的有极限平衡法,极限分析法,有限元法等.对各种分析方法做了简要的回顾与评述.基于极限平衡原理发展的各种分析方法,大多需要做许多假设,同时对岩质边坡又不能很好地考虑其断层节理特征.有限元强度折减法,是近年来发展起来的一种分析方法,与极限平衡法相比不需要任何假设,可以求得任意形状边坡的临界滑移面及其对应的安全系数,同时可以反映边坡失稳及塑性区的发展过程,为岩土体边坡分析开辟了新的途径.

Through decades of development, the analysis theories about slope stability have generally formed a relatively perfect system,the limit equilibrium method,the limit analysis method and FEM. This paper provides a brief introduction and comment. Most of the methods based on the limit equilibrium method need many assumptions, especially the discontinuity and jointed feature of rock slope. The strength - reduction method (SRM) can calculate the critical slip surface and its corresponding safety factor. And simultaneously it reflects the developing process of the slope instability and the plasticity. As a newly - developed method,it paves a new way for the rock slope analysis.