| Wuding county is one of the counties with more developed geological disasters in yunnan province.The frequent occurrence of geological disasters not only affects the normal production and life of local people and social stability,but also greatly destroys the ecological environment within the territory,thus restricting the local people to get rid of poverty and become rich and the sustainable development of the county economy.The study of the formation conditions of geological hazards under different geological environment conditions can provide theoretical Suggestions for the urban and rural planning,disaster prevention and reduction in wuding county.Based on the "detailed survey of 1/50000 geological disasters in wuding county",this paper starts with the geological environmental conditions for the formation of geological disasters and studies the formation mechanism of geological disasters.In wuding based on the analysis of regional geological environment conditions,find out the county within the types of the geological disasters of landslide,collapse,debris flow,three geological ZaiHaiDian development in 195,three types of geological disasters,in the majority with landslide,collapse,debris flow,is given priority to with small and medium scale,large less,statistics and analysis of all kinds of geological disasters characteristics,analyzes its space-time distribution rule.In addition,the relationship between geological hazards and geological hazards is analyzed and studied from the aspects of topography,geological structure,stratigraphic lithology,meteorology and hydrology,and human engineering activities,and the disaster mechanism of geological hazards in wuding county is finally obtained,which is roughly as follows: Wuding formation of geological hazards is due to the internal and external geological process and the result of the interaction between human activities and the steep terrain,easily weathered soft rock and soften earthquakes to form the basic condition of geological disasters,weathering destruction in geotechnical engineering,water cut,changed the balance of rock and soil body state,provides a space,the formation of geological hazards in addition,the construction of cut slope,destroying forest,mining and other engineering activities contributed to the formation of geological hazards.Finally,the typical geological disasters of Pingtianqing mudslide and Wandegu landslide were selected for engineering exploration,and the disaster characteristics,formation conditions and development trends were analyzed.Pingtianqing is a viscous debris flow ditch,with abundant loose sources,large catchment area,and development stage.The Wandegu landslide has a large scale,and the ancient landslide features are obvious.The current status is stable,but the front edge of the deposit is unstable.The probability of secondary landslides islarge.In disaster prevention and mitigation,and suggested that wuding geological disasters and disaster prevention and mitigation work shall be carried out combining with the characteristics of geological environment conditions of each section planning,avoid the combination of engineering measures and move,should do well in disaster forecast work before the rainy season,especially should strengthen the geological environmental protection consciousness,avoid human engineering activities on the geological environment caused extensive damage,geological environmental conditions of deep cutting river valley is a fragile area should be clear for engineering built the forbidden zone. |
PDF Full Text Request