土坡稳定性分析中滑移面位置及安全系数空间分布探讨

根据土质边坡的破坏模式及滑移面形状,由极限平衡理论,提出一种新的确定边坡最危险滑移面搜索模型,对土质边坡滑移面位置及安全系数空间分布进行分析与研究.在现有经验公式的基础上,将滑移面圆心位置所在的可能范围划分为多个子区域,并将多组边坡设计参数进行组合,计算得出对应滑移面圆心在各区域的分布规律;通过追踪搜索过程及拟合计算结果,利用空间三维曲面描述了安全系数空间分布规律;编制了应用程序,可应用于边坡设计与分析.

Discussion on location of slip surface and spatial distribution of its safety factor in stability analysis of soil slope

According to the failure mode and shape of slip surface of soil slope and based on limit equilibrium theory,a new searching model was put forward to determine the critical slip surface of soil slope.The regularities of location of slip surface and spatial distribution of its safety factor were analyzed and studied.Based on empirical formulas available,the potential location range of the center of circular slip surface was divided into several subrange,and the distribution regularities of the center of circular slip surface in each subrange were given by calculating a variety of design parameters of soil slope.By means of tracing the searching process and fitting the calculation results,the spatial distribution of safety factor was depicted with three-dimensional curved surface,the application program was compiled,and it could be used in the design and analysis of soil slope.