Study On The Density And Vibration Frequency Of Double Layer Soil

It is a new research subject to measure the density of subsoil by measureing vibration frequency of subsoil. Based on the past research, this dissertation has analysed the relationship between the dynamic parameter and the self-property, then based on the elastic half space theory of the dynamic foundation and the theory of the vibration, this dissertation get the expression about the relationship between the vibration frequency and the porous ratio (density) of the double layer soil.One of the prinicipal dynamic parameter of the subsoil is the dynamic shear modulus. This dissertation has analysed the relationship between the dynamic shear modulus and the porous ratio, water content etc characteristic parameters based on instant hammering, and get the expression of the dynamic shear modulus of double layer soil based on small deformation. And write out the experiential expression of the dynamic shear modulus calculating degree of saturation and based on large deformation.Based on the the elastic half space theory of the dynamic foundation and the theory of the vibration, analyzing the relationship between the vibration frequency and the dynamic shear modulus of the double layer soil, a relationship between the vibration frequency and the self-property of the double layer subsoil can be carried out. That is the expression about the relationship between the vibration frequency and the density of the double layer subsoil can be carried out.