J4 ›› 2011, Vol. 41 ›› Issue (1): 182-187.

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Dynmic Characteristics of Debris Flow Based on the Granularmetric Analysis of the Value of φ

HUANG Rui1,CHEN Jian-ping1,LI Hui-zhong2,ZHANG Chen1,ZHANG Wen1,XU Pei-hua1   

  1. 1.College of Construction Engineering, Jilin University, Changchun 130026, China;2. Institute of the Yangzi Gorges Exploration &|Research, Commission of Water Conservancy of the Yangzi River, Wuhan 443003, China
  • Received:2010-04-04 Online:2011-01-26 Published:2011-01-26

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Abstract:

The authors predicted the dynamic characteristics of the debris flow. First, the  granularmetric analysis was carried out and the qualitative judgment of the sedimentary environment was recognized. Then the  granularmetric analysis on  the accumulation zone of the debris flow was accomplished with the graphic method and the preliminary judgment of the dynamic characteristics was described. Finally, the force balance equation of the grain during the debris motion process was setup. The features of  the debris flow accumulation zone of  Fangshanguo along the Jinshajiang river was analyzed and   conclusions were come out: the debris flow is composed of the gravel generally and poor in  sorting, it made with the use of pulling and rolling of the gravity slope. Base on it,  the velocity of Fangshanguo gully was calculated as ub=8.67 m/s.

Key words: debris flow, accumulation, particle size analysis, dynamic characteristics, flow intensity

CLC Number: 

  • P642.23
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