Modeling of 3D stochastic fracture media and calculation of GPR response

摘要

Detection of weak zone is an important issue, this dissertation proposed a three-dimensional Koch curve to simulate the fracture zones of different moisture content, using the stochastic equivalent medium to establish geological background. A three-layers-soil moisture content model was established, with different oblique fissure zone, on the basis of numerical simulation of ground penetrating radar (GPR) to qualitatively analysis found that the moisture content is higher when the fissure zone waveform will mixed with background interface. After the$mathbf{S}$transformation (ST) of the response, the relationship between the response and moisture content of the fracture was quantitatively calculated. This modeling and signal time-frequency analysis method can provide reference for the detection of water-bearing fractured zone in the soil mass.