| The geological conditions of Qinhuangdao in Hebei are relatively complex,and rainfall leads to frequent geological disasters.Qinhuangdao,as one of the first coastal cities in China to open up,has experienced rapid economic development and extensive infrastructure construction.Facilities such as highways,railways,industrial and civil buildings may all have slope stability issues.There are many methods to evaluate the slope stability.Through comparative analysis of their advantages and disadvantages,ABAQUS software is finally used.The strength reduction method developed twice in the software can effectively and reliably analyze the stability of silty clay slope.This article studies the influence of changes in shear strength indicators of silty clay under different drainage conditions on slope stability.At the same time,10%,20%,30%,40% and saturated soil samples were prepared,and the data were processed using MATLAB software.The effects of different moisture content and dry density of silty clay on the cohesion and internal friction angle of the soil were analyzed under different dry densities.Based on the above,the stability of the silty clay slope was analyzed and the following results were obtained:(1)In the ABAQUS software calculation process,in order to be close to the actual working conditions and obtain accurate calculation results as much as possible,the shear strength parameters of the soil are reduced and defined as field variables.Based on the determination of the time when the slope produces a plastic through zone and the non convergence of the calculation data,the impact of the shear strength index of the silty clay slope soil on the slope stability under different drainage conditions is analyzed.(2)Based on shear data,MATLAB software was used to fit the moisture content and dry density.ABAQUS software was used to simulate dry density of 1.2,1.3,1.4,and 1.5g/cm under the condition of 10% moisture content,respectively And the dry density is 1.2g/cm 3 Analyze and compare the stability of slopes with moisture content of 10%,20%,30%,and 40% under certain conditions,and study the effects of moisture content and dry density on slope stability.(3)Numerical simulation analysis was conducted using ABAQUS finite element software to obtain the progressive failure process of the soil slope,as well as the changes in plastic cracking zone,stress and strain field variables,and the stability safety factor of the slope.In this paper,the silty clay slope is studied and relevant conclusions are obtained,which has certain reference value and practical significance for the future stability research and support engineering design of the silty clay slope in Qinhuangdao. |
