川东红层区某平面转折复合型滑坡稳定性分析

Analysis on Stability of the Plane Turning Compound Landslide in Red Bed Area of Eastern Sichuan

推导了平面转折复合型滑坡稳定性计算公式,并以川东红层区某平面转折复合型滑坡为例,评价和计算了该滑坡的稳定性。结果表明:该滑坡分为H1,H2滑坡,H2滑坡的剩余滑坡推力侧向作用给H1滑坡。H1滑坡前缘变形大,为牵引式滑坡;H1的滑动降低了提供给H2滑坡的滑坡抗力,导致H2滑坡滑动。天然工况下,H1,H2滑坡均处于欠稳定状态,在暴雨及地震工况下,处于不稳定状态。H1滑坡的稳定性总体差于H2滑坡。考虑H2滑坡推力对H1滑坡的影响时,原本在天然状态处于基本稳定状态的H1滑坡变为欠稳定状态。

The formula for calculating the stability of a plane turning compound landslide is deduced;the stability of the landslide in the red bed area of Eastern Sichuan is evaluated and calculated. The results show that the can be divided into H1 and H2 landslide. The lateral thrust of the residual landslide of H2 landslide gives H1 landslide.The front deformation of H1 landslide is large and it is traction landslide.The sliding of H1 decreases the resistance of H2 landslide and leads to the sliding of H2 landslide.Under natural conditions,H1 and H2 landslide are in an unstable state,while under rainstorm and earthquake conditions,they are in an unstable state. The stability of H1 landslide is generally worse than that of H2 landslide.Considering the influence of H2 landslide thrust on H1 and H1 landslide,which was in the basic stable state in natural state, becomes under-stable.