[关键词]
[摘要]
在边坡稳定分析中,进行三维稳定分析时通常都是采用饱和土强度理论,事实上地下水位以上的非饱和区的基质吸力会影响边坡稳定的安全系数,所以有必要基于非饱和土强度理论进行边坡稳定性分析。因此,本文基于非饱和土强度理论,并结合三维简化Bishop法思想推导了三维非饱和边坡稳定安全系数公式来评价边坡稳定性,并编制相应了的程序。最后,基于所提方法对嘶马河道岸坡的稳定性进行了评价,结果表明利用非饱和强度理论的岸坡安全性能比利用饱和强度理论的安全性有所提高,能更客观地对岸坡稳定进行评价。
[Key word]
[Abstract]
In the slope stability analysis, the strength theory of saturated soil was commonly adopted in three-dimensional slope stability analysis, but in fact the effect of matric suction in unsaturated zone could not be ignored, so it is necessary to adopt the strength theory of unsaturated soil for slope stability analysis. Therefore, based on the strength theory of unsaturated soil and thought of three-dimensional simplified Bishop’s method, a new formula of safety factor was deduced to evaluate slope stability and corresponding program was developed. Finally, the slope stability of Sima reach in Yangtze river was analyzed using the proposed method, the results indicated that the safety factor was increased based on strength theory of unsaturated soil compared to strength theory of saturated soil and it was more reasonable to evaluate slope stability by the proposed method.
[中图分类号]
[基金项目]