Volume 8 Issue 1
Jan.  2015
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Ji-kun ZHAO, Dan WANG, Jia-hong CHEN. 2015: Experimental study on slope sliding and debris flow evolution with and without barrier. Water Science and Engineering, 8(1): 68-77. doi: 10.1016/j.wse.2015.01.003
Citation: Ji-kun ZHAO, Dan WANG, Jia-hong CHEN. 2015: Experimental study on slope sliding and debris flow evolution with and without barrier. Water Science and Engineering, 8(1): 68-77. doi: 10.1016/j.wse.2015.01.003

Experimental study on slope sliding and debris flow evolution with and without barrier

doi: 10.1016/j.wse.2015.01.003
Funds:  This work was supported by the National Natural Science Foundation of China (Grant No. 51275250), the Natural Science Foundation of Jiangsu Province (Grant No. BK2010457), and the Agricultural Machinery Foundation of Jiangsu Province (Grant No. GXZ14003).
More Information
  • Corresponding author: Ji-kun ZHAO
  • Received Date: 2014-02-28
  • Rev Recd Date: 2014-09-09
  • A constitutive model on the evolution of debris flow with and without a barrier was established based on the theory of the Bingham model. A certain area of the Laoshan Mountain in Nanjing, Jiangsu Province, in China was chosen for experimental study, and the slope sliding and debris flow detection system was utilized. The change curve of the soil moisture content was attained, demonstrating that the moisture content of the shallow soil layer increases faster than that of the deep soil layer, and that the growth rate of the soil moisture content of the steep slope is large under the first weak rainfall, and that of the gentle slope is significantly affected by the second heavy rainfall. For the steep slope, slope sliding first occurs on the upper slope surface under heavy rainfall and further develops along the top platform and lower slope surface, while under weak rainfall the soil moisture content at the lower part of the slope first increases because of the high runoff velocity, meaning that failure occurring there is more serious. When a barrier was placed at a high position on a slope, debris flow was separated and distributed early and had less ability to carry solids, and the variation of the greatest depth of erosion pits on soil slopes was not significant.

     

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