DISCUSSION ON GENETIC MECHANISM AND GEOLOGIC CHARACTERISTIC OF LIUJIAWAN LANDSLIDE

Liujiawan landslide is at Donghekou Hongguang town of Qingchuan county. The large rock landslide is triggered by Wenchuan earthquake in 2008. Field survey results show that the landslide deposit is different to the general Wenchuan earthquake landslide deposit. The landslide has the first destruction collapse along with division zones of carbonaceous slate and dolomite. The slip source region triggers a secondary collapse along with the dolomite weathering unloading zones. It takes the shape of two stacked stacking platforms and distinguishes between different lithologies. The lithology and weathering unloading belt show a significant power failure characteristic. The rock physical science experiment and wave velocity test of landslide deposit studies show that the hard outer soft rock slope is composed of dolomite, carbonaceous-slate and phyllite and has obvious differences in characteristics to quantify, differences lithologic of rock slope contact surface. Under earthquake conditions, dynamic mutation effect coupling projections terrain is the main factor that caused the slope failure. Closer study shows that landslide movement can be roughly divided into the following five dynamic processes including shattered mountain stage, geological interfacial stress mutation, high speed collapse, sturzstrom and accumulation, and secondary collapse slip stacking.