CHARACTERISTICS OF MULTI-MODEL GRAIN SIZE DISTRIBUTION OF SLIP SURFACE SOILS AND DEPOSITS OF LANDSLIDES

This paper mainly examines the characteristics of the multi-model grain size distribution of slip surface soils and fine-grained deposits of landslides. It uses the high-resolution laser grain size analyzer MS2000 in five typical sedimentary areas of China. Then It summarizes the characteristics between the discrepancies of different types of slip surface soils and landslide deposits. The characteristics have important theoretical and practical significances for understanding the formation of landslide mechanism. The test results show that: 1)There are at most four models(median size are 1m, 1~10m, 10~100m, 100~500m, respectively) that are superimposed to constitute of landslide slip surface soil and the deposits in the different types of sedimentary areas. The characteristics of multi-models grain size distribution are the fine, median and coarse grain of suspension and saltation.2)Different types of landslides slip surface soils and the deposits can have significantly different characteristics of grain size distribution.3)the grain size discrepancy of landslides slip surface soils and the deposits in the same area can be controlled by the formation and evolution of landslides themselves.