| Yunnan is one of the provinces most seriously affected by landslides and mudslides.Huize country is a high incidence area of debris flow in yunnan province.In recent years,the frequency of debris flow outbreak has been further increased.At present,the present situation of mudslide in pingjing gully has serious hidden danger of disaster,which threatens the safety of local villagers' life and property.This article of huize ping Kim big gully as the main research object,through field survey statistics collected a large amount of data,according to the local regional comprehensive geological conditions,detailed analyzed the characteristics of debris flow valleys,forming conditions and formation mechanism,and the main kinetic parameters to calculate the debris flow,activity and made a risk assessment of debris flow,put forward the corresponding prevention measures.The main research results are as follows:(1)Based on the data collected from field exploration,the regional geological conditions were identified,the basic characteristics of the debris flow were analyzed,and the dynamic characteristic parameters of the debris flow were calculated,including the bulk density,flow rate,flow rate,impact force,ultra-high bend and other indicators,providing a basis for the design of debris flow prevention engineering.(2)The formation cause and mechanism of debris flow are analyzed and its activity and risk are evaluated.The development trend of pingjing gully debris flow is predicted by combining the factors of loose material source scale,hydrodynamic condition,gully bed blockage degree and geological condition.(3)According to debris flow characteristics,construction conditions,engineering effectiveness and other comprehensive factors in the exploration area,the safety level and technical standards of debris flow are determined.It mainly includes the construction of retaining dam,gufang dam,drainage channel and other projects. |
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