Vol13 No.9: 1544-1557
【Title】The spatial distribution characteristics of shallow fissures of a landslide in the Wenchuan earthquake area
【Author】XU Xing-qian1,2,4; SU Li-jun1, 2, 3*; LIU Chao1, 2, 4
【Addresses】1 Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences, Chengdu 610041, China; 2 Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 3 CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China; 4 University of Chinese Academy of Sciences, Beijing 100049, China
【Citation】Xu XQ, Su LJ, Liu C (2016) The spatial distribution characteristics of shallow fissures of a landslide in the Wenchuan earthquake area. Journal of Mountain Science 13(9). DOI: 10.1007/s11629-015-3487-9
【Abstract】Shallow fissures, being the main infiltration paths of fluid on the surface of a slope, played an important role in the whole process of a landslide. However, the spatial distribution characteristics of fissures in the slope are difficult to be determined. In this study, we attempted to characterize the variation pattern of slope fissures along depth in the Wenchuan earthquake area in Sichuan Province by combining engineering geological investigation, geomorphologic analysis and geophysical investigation. The geophysical methods that were used in this study include Multichannel Analysis of Surface Wave (MASW), Ground Penetrating Radar (GPR) and Electrical Resistivity Tomography (ERT). The results suggested that geophysical parameters (shear wave velocity, electromagnetic signals attenuation and resistivity) could provide valuable information for the spatial network of shallow fissures. Through the verification by engineering geological survey and geophysical sensitivity analysis, this work highlighted that MASW was the most appropriate technique to delineate the propagation of shallow fissures in a gravel soil slope.
【Keywords】Shallow fissures; Landslide; Wenchuan earthquake; Geophysical prospecting