The Characteristics And Control Techniques For Debris Flow On The Hills Of Yangdian Group 1 On National Road G213

Debris flow is one of the most common geological disasters in our country,especially after the Wenchuan earthquake,many mountain were loose in the disaster area,which had buried huge hidden troubles for formation of debris flow,therefore.,Debris flow occurred frequently landslides in Sichuan in recent years.A torrential rainstorm occurred in Miansi town of Wenchuan county on July 9th,2013,which was more than a time in fifty years,the hill back the Yangdian One Group broke out debris flow,that directly threated 38 households,129 residents,the brick field in Yangdian village as well as 400 meters of the national highway 213.It also threated a total of more than 10 million yuan of property.Once the debris flow occurs again,it would not only threat the local residents and Duwen highway,but also block the Minjiang River.Thus it will have adverse effect on the entire upstream and downstream residents along the river,and the disaster will be very serious.In order to control the debris flow and provide theoretical basis for similar debris flow,this thesis has analyzed the characteristics causes and put forward reasonable measures about this debris flow based on field inspection and monitoring.This thesis has analyzed the formation conditions the debris flow from natural and geological environmental conditions,topography and geomorphology,channel conditions,source conditions of the four channels in debris flow area,meanwhile,through analyzing the characteristics of erosion and deposition,calculating the eigenvalue of severe.flow,a flow amount,alluvium,stamping force and so on in corresponding methods,the causes and development trend of the debris flow are discussed.These gullies are turbulent,rainstorm debris flow at a low frequency,the frequency of the debris flow on 9th july,2013 is 50 years once,its total amount is about 2.6 × 104 m3.Taking into account of all the factors such as the channel conditions,mizoguchi deposit conditions,material source startup mode and the total amount of the solid material,this thesis proposes two control schemes,the first scheme is "submerged sill swarm+dam+stopping silt+drainage canals",the second scheme is "dam+drainage canal",comparing the technical feasibility,construction conditions and project investment between the two schemes,the first scheme is regarded as the final control scheme.The control scheme is refined at the construction stage.The paper would provide scientific basis for the smooth flow of the national highway 213,and a reference for the related study of debris flow.