APPLICATION RESEARCH OF GPR IN DETECTION OF EARTHQUAKE-INDUCED DEFORMATION OF SHAKING TABLE MODEL SLOPE

5.12 Wenchuan Earthquake led to large numbers of earthquake-induced deformation, and formed many potential hazards. The developing and evolving process of shatter crack of the mountains is the key element for the prevention and treatment of landslide. Shaking table test is a key mean of earthquake simulation in the lab, which can reproduce the deformation and destruction process of slope under earthquake action. GPR is a geophysical prospecting method by using reflection of high-frequency electromagnetic wave to detect target and geologic structure, which can be used to detect the position of sliding surface. By inputting sine wave of different frequency and same acceleration, the dynamic acceleration response characteristics of slope were researched on small scale shaking table. The development situation of slope cracks was detected by LTD-2100 GPR and radar antanna GC900MHz. The positions of the cracks were deduced on the basis of the interpretation results. The result showed that the location of the cracks detected by GPR were in accordance with dynamic acceleration response characteristics of slope. It is feasible to use GPR in shaking table test to analyses the cause and mechanism of earthquake landslide.