The Landslide Stability Evaluation And Management Research Of Man Chuanguan In Shan Yang Town

Man Chuanguan landslide of Shan Yang county locate in the north of Shan Yang county in Shan Xi province. In recent years, the landslide slope cutting lead to partial or whole instability of landslide, increase the disaster risk. Therefore,evaluation of stability and treatmeng to the slide has important practical significance.Based on the practical engineering of landslide, the transfer coefficient method and numerical simulation method are used to analyze the stability of landslide, and on this basis putting forward effective prevention and control measure to prevent the landslide. The main research contents include:(1) The thesis entirely analyses stratum and lithology 、 geological structure 、physiognomy 、 topography and hydrology geology condition of the Man Chuan Guan landslide. This article has carried on the landslide area field investigation work and the characteristics of the landslide area in detail in this paper.(2) Chosen transfer coefficient method to calculate this slope’s stability coefficient on the natural state condition and saturated condition. Calculations show that, this landslide was in the marginal steady state on the natural state condition, but it was at the non-steady state under the saturated condition.(3) According to the spatial structural features of Manchuanguan landslide,useing FLAC 3D to establish a three-dimensional numerical model, through the analysis of complex three-dimensional landslide displacement field, stress field, plastic zone distribution, combined with the landslide of the typical profile of stress, strain, landslide stability that in the natural state landslide is stable. FLAC calculations similar to limit equilibrium method of calculation results.(4) Based on the character of this landslide, chosen anti-slide piles and gravity retaining wall and drained ditch to reinforce the landslide. And calculate what’s the necessary of the selected reinforce methods, the results accorded with criterions and the designs are rational. For intercepting ditch and drain size and cross section area of the design, to meet the requirements of drainage.