Effect of Slope Angle on Stabilizing Piles in C-φ Soil

To evaluate the influence of slope angle on lateral force acting on anti-slide row piles in c-φ soil landslide, this work firstly proposes the numerical solution to determine nonlinear sliding surface of sliding wedge of soil. Accordingly, recursive solution for lateral pressure acting on active side of stabilizing piles is derived by flat element method. Furthermore, analytical solution for distribution of soil-pile pressure acting on anti-slide piles is obtained by utilizing the improved plastic deformation theory which takes account of soil-arching effect. The subsequent comparison shows that the results from predictions match well with which from tests and implies that the proposed approach can be employed to evaluate lateral force on stabilizing piles effectively. Finally, parametric study is performed and results illustrate that landslide thrust (i.e., passive load) on stabilizing pile will increase with increasing soil inner friction angle (φ), inclined slope surface angle (α) and with decreasing cohesion (c) and the ratio of pile spacing to pile diameter (D₁/d).