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Panzhihua Airport venue due to geological conditions are complicated, the period of construction at the airport, there were landslides occurred, October 3, 2009 Panzhihua Airport east of recurrence massive landslide, namely: Panzhihua Airport 12 # landslide. After the landslide, landslide has been in a state of creep deformation, enter 2010 after the rainy season, the rain-induced factors, the landslide deformation deformed into the acceleration phase, resulting in mid-August 2010 landslide resurrection. Panzhihua Airport 12 # landslide deformation and failure characteristics unique, safe operation of the airport in Panzhihua significant impact. By landslide deformation monitoring carried out, can be judged in different parts of the landslide deformation characteristics of the steady-state landslide, landslide study the deformation and failure mechanisms, analyze its stability, disaster prevention and mitigation of important guiding significance. In this paper, \mechanism were analyzed; through landslide monitoring, landslides resurrection before and after surface displacement monitoring results and deep deformation monitoring results carried out a detailed analysis; using limit equilibrium method and FLAC3D numerical calculation method, the filling body slide area and the trailing edge of the filling height landslide slope stability under various conditions were analyzed and evaluated, the evaluation concluded that the stability of the filling body slide zone safety margin is low, the rain is affecting the stability of major landslides induced factors . Details and results are as follows: (1) Chengdu University of Panzhihua Airport 12 # landslide and the trailing edge of the filling height landslide slope deformation monitoring carried out deep and surface displacement monitoring, monitoring results showed that: the natural state, filling the body slide area occurring with a rate of creep deformation, filling the slider body region and the back region Ⅰ -1 Ⅰ -2 landslide areas are a key component of the control is generated first sliding region, the deformation of the front of the main post passage of the result section. Rainfall factor is causing the deformation rate increases landslide induced factors, and ultimately led to the Panzhihua Airport 12 # landslide resurrection, as the landslide sliding kinetic energy dissipation and Panzhihua end of the rainy season, easing landslide deformation monitoring data verify the landslide is a \Monitoring results showed that after pipe pile Emergency Treatment and emergency flood strengthening works, the site has been greatly improved stability, but deep borehole inclinometer deformation monitoring results reveal that the site may have the potential sliding surface development. (2) using the limit equilibrium method for landslide active landslide area - reclamation area and the landslide body trailing edge of the slider body filling high slope in a natural, storms, earthquakes, storms and other conditions of the stability of the earthquake was quantitatively evaluated. The results show that: the natural state, filling the body slide zone safety margin is low, filling the body to maintain the basic stability of high slope; storm, earthquake state, filling the body slide area may produce massive instability and failure, filling height slope instability may occur locally situation; rainstorm state earthquake, landslide body and the filling body mass high slope instability failure will occur. (3) By FLAC3D numerical simulation method to analyze the trailing edge of the landslide slope in a natural filling height, heavy rain, storm conditions excavation deformation and stress field, evaluate its stability conditions and monitoring results were compared with analysis .
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