Design Of Unstable Slope Control Project In Yan Chi Zhen Tian Village In Beijing

The geological survey of the geological disasters(unstable slopes)is put into engineering geological surveying,engineering survey,trench exploration,geophysical prospecting and sampling test.The topography,stratigraphic lithology,geological structure,hydrogeology and geology Engineering geologic conditions,etc.,obtained the rock and soil mechanics parameters needed for the slope stability evaluation,and provided the first-hand information for the slope stability analysis and evaluation.Through this survey,the following conclusions can be drawn:1.Tianzhuang unstable slope was North West-South and East direction of the show,north to have been arranged ditch for the sector,south to the rear wall of the housing sector,east and west sides of the natural formation Gap for the sector.The northwest high southwest low,the relative height difference of 20 m,the slope of the overall slope SE140 o,slope 24.5 o.The vertical(NW-SE)is about 50 m long and the lateral(NE-SW)is about 278 m long.2.To identify the formation mechanism of the slope deformation: slope deformation zone to Quaternary slope sedimentary layer creep deformation mainly in the area of material composition to breccia mixed clay and silty clay-based,surface cover artificial fill,The thickness of the soil layer is large,the physical and mechanical properties of the water are poor,and the material basis of the collapse and deformation is made.The high and steep formation of human engineering economic activities such as artificial cultivation of cultivated land and housing construction The temporary surface provides a temporary condition for slope deformation.In addition,rainfall is one of the most important factors to induce slope instability.3.Through comprehensive analysis,Tianzhuang unstable slope failure mode mainly in the small-scale collapse of the main,under continuous rain conditions,there may be gradually evolved into slope debris flow,the slope of the front edge of more than 30 households,more than 100 people,nearly 100 houses Produce the most direct and serious threat.4.Calculated by the stability of the slope,the slope in the natural state and natural state + earthquake conditions in a stable state,but in the natural state + rain state conditions are extremely unstable conditions.Calculate the obtained damage surface with the actual comparison.5.The report proposed the slope can be used to prevent the use of retaining wall + drainage + slope engineering + slope protection project combined with a comprehensive management program.