关键词: 模型试验, 颗粒级配, 偏转角, 下垫面, 滑坡运动

Abstract: Landslide of high speed and long distance is characterized as complex movement mechanism, great threat and abrupt occurrence. The landslide undergoes acceleration on slope, collision at the slope toe, deflected speed-retaining effect and accumulation of speed reduction in the movement process. Laboratory model tests are used to investigate the influence of the rock and soil type, turning direction angle, underlying surface on landslide movement. The test results show that the movement distance of the landslide is controlled by the rock and soil type. As turning direction angle increases, the movement distance reduces and the accumulation thickness increases. The turning direction angle has obvious particle sorting effect on the landslide. The underlying surface friction type apparently influences the movement parameters, which will eventually affect the accumulation shape. The experiment can provide evidence for further studies on landslide movement velocity, movement distance and accumulation shape.

Key words: model test, particle gradation, turning direction angle, underlying surface, landslide movement