Charts for estimating strength parameters from slips in homogeneous slopes
Charts for estimating strength parameters from slips in homogeneous slopes
复制标题
DOI：
10.1016/j.compgeo.2006.07.005
复制
发表时间：
2006-09
影响因子：
5.3
通讯作者：
Jingcai Jiang;T. Yamagami
中科院分区：
文献类型：
--
作者：
Jingcai Jiang;T. Yamagami
当均质土坡中的边坡几何形状、容重和孔压分布已知时，特定的条块法的临界滑动面位置只与c‘(粘聚力)和tanϕ’(内摩擦角)之比有关。为了将这一关系用于反算c‘和ϕ’值，提出了两种具有圆滑机制的边坡模型来描述简单填挖边坡和长天然边坡的剪切破坏，并在每个模型中引入了关于c‘/tanϕ’和临界滑动面最大深度的两个无量纲参数。根据边坡模型极限平衡分析的新结果，绘制了两个无量纲参数与安全系数单位ϕ值之间的关系图。使用这些图表可以从均质边坡中已知的破坏面位置快速估计c‘和ϕ’的震级。
When the slope geometry, unit weight and pore water pressure distribution in a homogeneous soil slope are given, the location of the critical slip surface for a particular method of slices is related only to the ratio of c′ (cohesion) and tanϕ′ (internal friction angle). To utilize this relationship in back calculating c′ and ϕ′ values, two slope models with circular slip mechanism are presented to represent shear failures in simple fill or cut slopes and long natural slopes, and for each of the models, two dimensionless parameters regarding c′/tanϕ′ and maximum depth of the critical slip surface are introduced. Based on the new findings from limit equilibrium analysis of slope models, charts are plotted to show the relationships of the two dimensionless parameters and ϕ′ values for a safety factor of unity. Using the charts can make a rapid estimate of the magnitude of both c′ and ϕ′ from a known position of the failure surface in a homogeneous slope.