Seismic Response Analysis Of Pile Foundation-Trimmer Beam-Retaining Wall

Southwest China is an earthquake-prone area, and has many slopes, earthquake caused a great harm. Pile foundation-trimmer beam-retaining wall as a new retaining structure, has light structure, strong carrying capacity, small deformation and other characteristics, has a good prospect in Slope Engineering, but the theory is not perfect, engineering applications often rely on experience, particularly the seismic dynamic response of the structure is minimal, in this paper, on the basis of the conventional static methods, with numerical simulation, mainly to do the following studies:(1) Introduces the research status of pile foundation-trimmer beam-retaining wall, summarized retaining wall, joists and pile static methods, on this basis, put forward a dynamic research methods considered pile and joist as a whole part, and came up with a calculation method of the soil pressure of retaining wall.(2) Based on one pile foundation-trimmer beam-retaining wall in Luzhou Xuyong, use MIDAS GTS NX to build a three-dimensional model, under static and seismic loads, respectively comparative analysis the horizontal displacement, vertical displacement and internal force variation of retaining wall, joist and pile, find the occurrence position of the maximum displacement, to provide a reference for engineering application.(3) Using the method of control a single variable, under 0.2g peak acceleration of EL Centro earthquake waves, research the effect of different pile length, pile spacing and clay elastic modulus to structure’s relative horizontal displacement, shear and moment, and study the optimal anchoring depth and spacing of pile.