Numerical Analysis Of The Passive Resistance Of Foundation

In recent years,due to the urban construction in our country and the strong development of rail transit,a large number of underground space engineering appear constantly,followed by a foundation pit engineering become the focus and difficulty of the present domestic geotechnical engineering research.Deformation control problem of foundation pit and foundation pit deformation control of the nearby building environment problem has been the most valued in foundation pit engineering design.Due to the urban construction,the deep foundation pit engineering is often in a relatively complicated and sensitive environment,and in order to control the deformation,the correct selection of parameters of soils is becoming the key problems in design of deep foundation pit engineering in the environment.This article based on the jinan a deep foundation pit deformation monitoring date of ultra-high commercial complex project,through the use of theoretical analysis and MATLAB program methods of modeling simulation,displacement back analysis to study on the method for determining the parameters of foundation pit engineering design,and applied to the optimization design of foundation pit engineering,the concrete work is as follows:1.Sum up and put forward the design method of foundation pit supporting and related load model of active soil pressure.2.Briefly introduce finite element theory for plane linkage on elastic foundation beam.3.The finite element program is developed with MATLAB to calculate the structural horizontal displacement of foundation pit supporting under a given load model.4.Through the comparison of the foundation pit horizontal displacement calculated value and the measured values using simulation software iterative method,back analysis to find out the least square difference of m-value.5.Through the study and analysis of the optimal values of m-value,find out the affecting factor on the changes and rational selection method of m-value,foundation pit design gives theoretical guidance and reasonable data for later project of foundation pit design.