Stability Analysis And Prevention Measures Of Xinzhai Landslide In Daxing Town, Duling Town, Luchun County, Yunnan Province

In this paper, the new Village Lvchun landslide as the research object, based on field surveys of the system, in-depth analysis of geological background and the basic characteristics of the landslide, using limit equilibrium and numerical simulation flac3D calculation method to evaluate its stability, provide a theoretical basis for landslide control and protection.The results showed that:Walled landslide was Lvchun whole new chair-like, open slope leading edge, a trailing edge slightly narrower, with an average thickness of about7m landslide volume of about28cubic meters, is a massive ancient landslide. Sliding bed composed mainly of moderately weathered mudstone, landslides cut the lower part of the back wall and the exit location is also completely weathered mudstone. The slide surface is irregular polyline appear before the junction of rock and soil type, slippery surface inclination between2～49。Lvchun new village landslide stability factors including topography, lithology, geological, hydrological conditions, earthquakes, and human activities.Calculate the limit equilibrium method showed:Landslide (1-1’profile)(2-2’profile)(3-3’sectional) in the natural state stability coefficients were1.31,1.284,1.419, in a steady state, full of water stability coefficients were1.01,1.016,1.018the state, in the limit equilibrium;(4-4’cross-section) in its natural state K=1.29, in a steady state, under the saturated state K=0.82, unstable state;(5-5’cross-section) in its natural state K=0.74, saturated state K=0.48, are in an unstable state; the landslide is divided into two zones, landslide body (I area) that (1-1’sectional)-(3-3’within the range between the cross-section), in its natural state basically stable area at saturation less stable state,(II area) is unstable secondary landslide areas, namely (4-4’profile)-the (5-5’cross-section) range, landslides ii belonged to the unstable region.The results of numerical simulation shows that, in the natural state of maximum displacement to the right of the landslide, but there is also the phenomenon of stress concentration, indicating the right side of the landslide may be unstable. In storm status, landslides overall stress and displacement are to grow exponentially in the next rainstorm state sectional area of4,5maximum displacement reached more than2m, due to the infiltration of rain, landslides and mechanical parameters to reduce the sliding surface, weight gain, landslides in an unstable state.In summary, under the current situation, the landslide has a sliding again (continuous rainstorms) may, AHP program to optimize the ratio of the five selected to finalize the program for the anti-slide pile++Surface Water and Groundwater Interception gravity retaining+grass slope comprehensive management plan for the optimal design.