摘要
土坡在进行稳定性计算时传统的极限平衡分析方法对于同一土体多采用单一的土体强度参数。近年来,人们致力于土体含水量与抗剪强度之间的关系研究,试验证明不同的含水量下土体的抗剪强度指标有很大变化。在连续的降雨条件下,在土体内部形成渗流改变土体的含水量会引起抗剪强度的变化,随时间和渗入量的不同土坡稳定性将随之改变。基于降雨条件下边坡饱和—非饱和渗流计算,利用土水分离土条自重法计算在不同时刻土坡的动态稳定系数,同时分析潜在滑动面的变化规律。
The traditional limiting equilibrium method is used in calculating the slope stability in terms of same soil and single shear strength. Researchers have devoted to the study of relationship between moisture content and shear strength in recent years, shear strength varied greatly when moisture content changed, and was testified by trial. The soil shear strength will change with moisture con- tent variation for water infiltration under continuous rainfall condition and the soil slope stability coefficient is also changed. The dynam- ic stability coefficients and the regularity of potential slip surface are obtained based on the saturated-unsaturated seepage calculation and the use of water separation from soil for slice weight calculation.
出处
《江苏地质》
2007年第3期254-257,共4页
Jiangsu Geology
关键词
土坡
非饱和
入渗
抗剪强度
滑动面
Soil slope
Unsaturated
Infiltration
Shear strength
Sliding surface
