Study On Pile-soil Parameters Of Laterally Loaded Pile In Slope Foundation

A large number of modern engineering structures are built on slope sites.To ensure the safety of the superstructure,the pile foundation design must consider the horizontal bearing capacity of the foundation.Based on the existing test pile data,this paper studies the two parameters and comprehensive stiffness of the gravel foundation in the southwest mountainous area by using the two-parameter method of thrust pile and the comprehensive stiffness principle.The calculated results are compared with the measured values to analyze the law of pile-soil interaction and the difference with horizontal foundation.At the same time,the finite element software is used to calculate and analyze the stress and deformation process of the slope thrust piles,and the value of the pile-soil parameter coefficient of the slope gravel soil foundation is further studied.The calculation results of the two-parameter method and the comprehensive stiffness principle are verified.Provide reference for similar pile foundation design and pile foundation characteristics research.The main research contents and results of this paper are as follows:(1)Using the two-parameter method and the comprehensive stiffness principle of the thrust pile,the Matlab program for solving the parameters of the relevant equations is compiled,and the values of the calculated parameters under different slope conditions are obtained.According to the comparison between the calculated values of the displacement,rotation angle and bending moment of the pile body and the measured values of the field test,the relationship between the calculated values of the pile foundation characteristics and the measured values is obtained.(2)Using the measured values of the field test piles,the pile-soil parameters "m" and "1/n" of the two-parameter method of the gravel pile foundation of the three types of slopes(15°,30°,45°)are obtained.The value of "?" and its variation with load and slope are obtained.The variation law of the comprehensive stiffness value of the slope thrust pile with the load is obtained.The process of field test piles was also analyzed and calculated by Midas GTS software,and a similar law was obtained.(3)Contrasting and analyzing the similarity between the m method recommended by the project and the method of this paper and the method of field test piles,the applicability and correctness of the two-parameter method of thrust pile and the comprehensive stiffness principle under slope conditions are obtained.