Study On The Development Characteristics And Prevention Measures Of Landside Of Slate Base In Pingtan Township Of Dazhou City

The research object of this paper is the landslide of slate base in Pingtan Township,Dazhou City,Sichuan province.Firstly,the geological environment condition of landslide area is investigated,and according to the failure characteristics and terrain features can be divided into H1-A/B two deformation zone landslide;Then,the formation mechanism of the two landslides is studied in detail,and the deformation and failure mode of the landslide is determined macroscopically.Through the analysis and calculation of the stability of the landslide,an economic and reasonable engineering treatment scheme is put forward.Through the research of this topic,the following conclusions are drawn:1?The landslide length of H1-A landslide is about 95m,the width is about 140m,the area is about 12385m~2,the thickness of sliding soil is about 2~8m,and the square is about7.5×104m~3;The landslide length of H1-B landslide is about 40m,with a width of about35m,an area of about 1758m~2,and a thickness of about 2~4.8m,with an average thickness of about 4m and a square mass of about 0.703×104m~3.Both of them are small shallow soil landslides.2?The main reason of landslide sliding is studied:One,the landslide geological environment conditions,landslide body is the Piedmont gentle slope terrain,conducive to surface,groundwater accumulation,infiltration and storage;Two,rainfall infiltration and runoff to slope soil water saturation,weight increase,groundwater infiltration runoff to the weak interlayer potential sliding zone,to soften the weak interlayer and increase landslide pore water pressure,while increasing the upper soil pressure;Three,the front channel caused by rainfall erosion,lateral erosion,gully bed,the airport is the main factor of H1intensified H1-A landslide deformation intensified.3?According to the analysis of deformation,failure and stability of the landslide on the basis of stone slab foundation,the stability coefficient of landslide under natural conditions is 1.145-1.312,and it is stable and basically stable;Under the rainstorm condition,the stability coefficient is 1.007~1.032,which is under stable and consistent with the actual deformation of the landslide.4?According to the stability of landslide and the object of protection,the economic and feasible prevention measures are adopted.The specific prevention and control scheme of landslide area is:anti slide pile(H1-A landslide)+retaining wall(H1-B landslide)+drainage ditch(H1-A/B landslide).