Abstract：The anti-slide pile is simplified into a two-dimensional model and is designed with the calculation width Bp in the conventional anti-slide pile design method in China. The improved method is studied for the unreasonable simplification of the frictional resistance beside the pile. The shear constitutive equation of the cementation surface is obtained by the concrete-rock cementation surface shear test. The equation is applied to the design of socketed segment of anti-slide pile；and then the design formula based on K method is derived. By using Majiagou #1 landslide as a case to make comparison between the aforementioned improved method and conventional K method，it is found that the difference of pile displacement is great and the difference of internal force is neglectable. Through sensitivity analysis，it is concluded that the pile displacement reduces with the increasing residual shear strength f and the decreasing critical displacement xs. The influence of f on pile displacement is greater than that of xs；both of f and xs have slight effect on internal force distribution. Displacement is an important index in anti-slide pile design；so the anti-slide pile design should take the distribution of frictional resistance beside the pile into account and combine with the cementation surface shear test.
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2013, Vol. 32 
