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[1]TONG Xiao,PENG Jianbing,ZHU Xinghua,et al.Analysis and Prevention of Landslide Debris Flow in Honghuazui of Tianshui City[J].Research of Soil and Water Conservation,2016,23(03):343-347,353.

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Analysis and Prevention of Landslide Debris Flow in Honghuazui of Tianshui City

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 03 Page number: 343-347,353 Column: Public date: 2016-06-28

Title:: Analysis and Prevention of Landslide Debris Flow in Honghuazui of Tianshui City

Author(s):: TONG Xiao¹, PENG Jianbing^1,2, ZHU Xinghua¹, MA Penghui¹, MENG Zhenjiang¹; 1. College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China;
2. Key Laboratory of Western Mineral Resources and Geological Engineering, Ministry of Education, Xi’an 710054, China

Keywords:: landslides; debris flow; numerical calculation; embankment; early warning

CLC:: P642.2

DOI:: -

Abstract:: The accumulation of loess is loose after many small slips of the upper and side walls in Honghuazui. With concentrated rainfall in the summer and fall, the instability landslide will move downstream along the gully and will carry a large number of loess sources and transform into debris flow, it will be estimated that there is 10⁵m³ of the potential debris flow source. Using the quantitative formula and particle flow numerical calculation analysis of Honghuazui, we determined the size and scope of landslide debris flow. The control method of setting up the embankment was selected, and the debris flow front distance reduced to 1 531 m, the accumulation zone width reduced to 552 m, the accumulation zone width in building, highway and farmland reduced to 174 m and the debris flow peak velocity decreased to 10.1 m/s. The embankment evaluation index P to measure the efficiency of control was put forward. The calculation results show that the embankment can greatly reduce the harmful level of debris flow.

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