Study On Spatial Variability Of Soil Parameters Of Clay Soil In Hefei

Soil is a kind of engineering material with large variability,and the spatial variability analysis of geotechnical parameters is the theoretical basis for the reliability design of geotechnical engineering.In order to study the spatial variability of the basic physical parameters and hydraulic parameters of unsaturated clay in hefei,this paper studies the following researches on the clay in hefei:For hydraulic parameters,this paper uses the bench centrifuge for hefei unsaturated clay centrifugal experiment,obtain the suction of the soil and the relationship between the moisture content,so that we can save test time,improve the test speed,and then on the basis of the van Genuchten model,using scientific computing language Lsqcurvefit function of Matlab curve fitting of test results is performed,and hydraulic parameters.In the aspect of spatial variability,a large number of geotechnical tests were carried out to measure the physical parameters and hydraulic parameters of the three boreholes in a total of 45 types of soil.The mean value,mean variance,variation coefficient and parameter distribution of geotechnical parameters are obtained by traditional statistical analysis method.At the same time based on the random field theory and statistical theory,through the three kinds of calculation methods to solve different 34 groups of geotechnical parameters and field testing data of vertical range,evaluate the 3 kinds of calculation methods,and compared the theoretically the relationship between the variation function and correlation function.