浸润线缓慢上升对滑坡剩余推力的影响规律

地下水浸润线变化对滑坡下滑力、抗滑力和剩余推力的影响甚大。基于传力系数法,建立了浸润线缓慢上升时剩余推力改变量的计算模型,探讨了滑面倾角、浸润线角度和滑面内摩擦角与倾角正切比对浸润线缓慢上升前后滑坡剩余推力改变量的影响规律;将浸润线缓慢上升时剩余推力由增大到减小的分界点称为剩余推力变化临界点,分析了剩余推力变化达到临界点时的浸润线倾角分布规律;提出了剩余推力变化的临界线,确定了浸润线缓慢上升时剩余推力的增大区域和减小区域。

Influence Law of Slowly Rising of Phreatic Line on Residual Sliding Force of Landslides

Changes of phreatic line of groundwater have great impact on sliding force,anti-sliding force and residual sliding force of a landslide.Based on Transmission Coefficient Method,a calculation model for the varibles of residual sliding force with slow rise of the phreatic line is established,which is used to discuss influence rule on residual sliding force of sliding surface angle,phreatic line angle and tangent ratio of internal friction angle to sliding surface angle.The dividing point,where the varibles of residual sliding force with slow rise of the phreatic line vary from increasing to decreasing,is called the critical point of residual sliding force,and the distribution of phreatic line angle is analyzed as residual sliding force arrives at the critical point.The critical line,increasing area and decreasing area of residual sliding force during the slow rise of the phreatic line,are put forward.