LAUSR

Abstract This work describes and investigates the cavities detection in urban areas using a non-destructive method by using the ground penetrating radar (GPR) and modeling by developing a numerical code based on the FDTD method. Moreover, based on the change in the amplitudes of the reflection and diffraction waves from the surfaces of the cavities, through which we can distinguish the cavities with high accuracy. In order to implement the experimental study, we chose different sites with different physical properties located in Morocco: mountainous (Quarries Khamis Anjara) and coastal area prepared for construction. The main objective of the geophysical detection of the cavities and the fragile areas to avoid significant risk on the construction works. The experimental results show a big similarly to the modeling simulation results. Ended, the simulation results using the amplitude signal of the waves show a high accuracy compared to Radargram.