A Study On Density Measuring Of Silt Or Sand Subsoil By Instant Harmmeing Method

The instant hammering method to measure the density of silt or sand subsoil is a new research subject. By using the data of the experiment,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,this dissertation get the method to measure the density of silt or sand subsoil using instantaneous implusion.The main dynamic parameter of the subsoil is the dynamic shear modulus. Base on the data of the experiments,analyzing the relationship between the dynamic shear modulus and the characteristic parameters such as the density,the water content and the shear distortion,the expression of the dynamic shear modulus of the subsoil is picked out.Base on the elastic half space theory of the dynamic foundation,analyzing the relationship between the vibration frequency and the dynamic shear modulus of the soil,a relationship between the vibration frequency and the self-property of the subsoil can be carried out.That is the expression about the relationship between the vibration frequency and the density of the soil can be carried out.Thus,based on the method recommended by this dissertation,using instant hammering the subsoil,by analyzing the data,the density of the subsoil can be got.