Stability Analysis Of Slopes And Reinforced Design Procedure Of Anti-sliding Piles

As an efficient engineering measure of landslide treatment, anti-sliding piles is a very important measure in the measures of landslide treatment all over the world. The anti-sliding piles are widely used in the reinforcement engineering of slopes and mitigation and prevention of natural geological disasters induced by landslides. However, because of its rather sophistication, the working mechanism of stabilizing piles and stability of piles in the slopes are not clarified especially when the piles are subjected to the combined actions of both components of horizontal load and vertical load as well as moment imposed by the superstructures. The main research work done in this thesis consists of the following parts.Firstly, FEM-based numerical analysis of slope stability and the corresponding failure criterion is analysed. According to the large general FEM analysis software—ADINA, Through numerical computations and comparative analyses based on FEM, four criteria for assessing the critical failure state of slope, including the criteria on the basis of iteration non-convergence of nonlinear FEM numerical calculations, equivalent elastic strain and plastic zone extension from the toe to the top of slope and slope face characteristic point displacement increases steeply, are respectively examined. It is found that the instability criterion based on iteration non-convergence of numerical solution is easier to be used in the numerical implementation. Moreover, the effects of element type, parameter of shearing strength, dilatancy, Young's modulus and Poissons ratio on the safety factor of slope stability is examined. The analysis the sensibility regard to dilatancy to strength parameter is discussed.Secondly, slope stability under the effect of anti-sliding piles is analysed. According to the different of constraint condition, the deflection, bending moment and shear force of anti-sliding piles is solved. Based of iteration non-convergence of numerical solution, effect of slope stability regard to location of anti-sliding piles, piles diameter, piles constraint condition, strength parameter and piles flexural rigidity is examined. Distribution form and change law of contact force and soil pressure of anti-sliding piles is discussed. The reference basis to simplified design of pile-stabilized slope is provided.Finally, making use of the method of anti-sliding piles reinforced slope, the project is computed and reinforced according to the FEM and codes and standards.