Internal Force Properties And Calculation Method Research Of Anti-Slide Pile In Bedding Rock Slope

Practice has proved that the anti-slide pile is a quick, safe and economical solution to some of difficult problems in slope engineering. Currently, it has been widely used in highway, railway, water conservancy and hydropower projects in bedding rock slope reinforcement. However, traditional researchs are mostly considered anti-slide pile for soil medium. There is a great shortage of it used in bedding rock slope reinforcement, especially in aspects of theoretical analysis methods, load-structure physical model test, etc.In this paper, based on previous results, mechanical model research, indoor physical model tests inquiry and three-dimensional numerical simulation of anti-slide pile reinforcing bedding rock slope are carried out. Then through the comparison of results, the internal force characteristics of anti-slide pile in bedding rock slope is analyzed and summarized. The main research results are as follows:Firstly, after analyzing defects of traditional design methods of anti-slide pile, an elastic mechanical model and an ideal elastic-plastic mechanical model of anti-sliding piles reinforcing bedding rock slope are established grounded on the introduction of several assumptions. The model is divided into two parts, one of which is load bearing segment, above the sliding surface; the other is anchorage segment, below the sliding surface. Then deflection curve differential eguations of both are set up based upon Materials Mechanics. After then, the solution procedures and related parameters establishing ways are given.Secondly, the model test on anti-slide pile reinforcing bedding rock slope is see little off in existing papers. Anti-slide pile models were made of PMMA resin for the first time in the model tests carried. Single-pile and double-pile indoor physical model tests were taken. Displacements of several points on the slip mass and strains of several points of piles were monitored in each step of lateral thrust. Then several bending moments were obtained by strains which were monitored in model tests, and bending moment distribution in each step of lateral thrust was achieved by Gauss Equation fitting and principle of Least Square Method. Furthermore, internal force distributions and deflection curves were gotten by derivation and Diagrammatic Multiplication Method. Finally, internal force distribution pattern is summed up.Thirdly, comparison among the "cantilever pile" model, the improved "cantilever pile" model and the elastic mechanical model established by the author are taken. Then through calculating of the model test, internal force distributions and deflection curves are gotten. After contrast with model test results, it is proved that the mechanical model established by the author is more suited to the calculation of anti-slide pile reinforcing bedding rock slope.Forthly, the numerical simulation of model test is disposed by FLAC^3D software which is based on the finite-difference principle. Via FISH language of this software, the internal force solution is given. Further more, by comparing its outcome with the result elastic mechanical model by author and model test, the feasibility of this mothed in application of anti-slide pile reinforcing bedding rock slope is conformed, which would lead to the use of this mothed in anti-slide pile structure optimal design within bedding rock slope reinforcement, etc.