Based on the research of anti-slide pile in landslide control engineering,a new combined anti-slide pile was put forward,which is composed of three single piles,connecting by pile top beam,and has a higher stiffness and less deformation.In the landslide thrust,back row piles produce deformation,and the deformation directly effect on the soil between piles.Through the solution of additional stress of soil between piles,the additional effect of landslide thrust in the front row pile was calculated.By using the displacement earth pressure model,the pile flexural differential equation was established.This kind of anti-slide structure was applied to control Suoertou landslide in Zhouqu region,and the field measurements and theoretical calculation methods for the bending moments and displacement values were compared.The results showed that the proposed method is reasonable and feasible,and provides a basis for further study of the anti-slide piles’stress mechanism of the pile-soil interaction.
