Anti-slide Pile Design Calculation Method

As one of the most effective anti-slide structure, anti-slide pile is widely used in the prevention of landslide. But the design and computing method of anti-slide pile is fallen behind the engineering conditions and is not very reasonable, presently. In this thesis, the present studying status of the pressure method, the displacement method and the finite element method in the design and computing of anti-slide pile is introduced systemically. And the problems of the three kinds of methods used in the design and computing of anti-slide pile are also analyzed thoroughly. So based on the analyzing of the status of the finite element method used in the design and computing of anti-slide pile, the finite element method is improved better for its application in the design and computing of anti-slide pile. In the elastic beam system FEM, the load on anti-slide piles is taken as the RANKINE earth pressure model commonly, and the dynamic adjustment of the earth pressure is not treated in the analyzing of interaction between anti-slide pile and earth body of landslide. And in the continuous medium system FEM, the actual stress and deformation state of anti-slide pile loaded are not simulated because the strain of the public nodes between pile and earth is not harmonized. In this thesis, based on the combination of the elastic beam system FEM and the continuous medium system FEM, the displacement iteration FEM, as a new method, is brought forward for designing and computing the anti-slide pile. And the finite element model of single and double row anti-slide piles in landslide prevention are established. The internal force and displacement of the anti-slide piles in the two finite element models are also computed.For the finite element model of the single row anti-slide piles, the landslide prevention system is divided into three parts, including the earth body in back of the piles, the anti-slide piles and the earth body in front of the piles, which is independent and interacting. And each part of the model is computed independently, but the boundary conditions for the three parts of the model are uniform. The landslide earth body is simulated into solid element and the grid of the finite element model of the earth body is subdivided by 2-D triangle element. The anti-slide pile is simulated into beam element and the grid of the finite element model of the anti-slide pile is subdivided by 1-D beam element. The excavating hole of the anti-slide piles is finished immediately. The horizontal displacement...