Study On The Internal Force Calculation And Structural Design Theory Of Circular Anti Slide Pile For Slope Reinforcement

Anti slide pile is a kind of measure commonly used in landslide prevention and control engineering,and has been widely used in the engineering application of slope reinforcement.At present,there are two kinds of widely used anti slide pile sections,namely,rectangle and circle.However,at present,the theoretical research of anti slide pile at home and abroad mainly focuses on the anti slide pile with rectangular cross-section,and the research of circular anti slide pile is less,and there is no clear distinction between the circular pile and the square pile in the current anti slide pile design specifications.Only the circular pile is equivalent to the square pile in the calculation,so the research on the relevant theory of circular anti slide pile is extremely important.In this paper,theoretical analysis method is used to study the determination of pile spacing and internal force calculation theory under the action of soil arch of rectangular and circular anti slide piles.The main research contents and results are as follows:(1)The finite element software GTSNX is used to build a two-dimensional numerical model and carry out static analysis,so as to study the formation mechanism and influencing factors of circular section anti slide pile soil arching effect.(2)Firstly,the research on soil arching effect of rectangular anti slide pile is analyzed and summarized.Then based on the generalized Hooke's law,the formula for determining the pile spacing of the soil arch on the side of the rectangular section anti slide pile is given.Finally,the paper studies the soil arching effect of circular section anti slide pile,theoretically deduces the calculation formula of circular section anti slide pile spacing under the action of friction soil arching,and discusses and analyzes the relevant factors affecting the pile spacing.(3)In this paper,K method is improved in the current code of anti slide pile design,and the calculation method of internal force and displacement of circular section anti slide pile is studied under the condition of vertical friction.MATLAB is used for programming calculation,and the calculation results of the two methods are compared,and the influencing factors are analyzed.(4)Combined with the engineering practice,the formula for determining the pile spacing and the improved K method are used to design the reinforcement scheme of circular pile and calculate the internal force and displacement of circular pile.