Study On Characteristics And Comprehensive Improvement Measures For Danba Substation Landslide

Landslide is one of the most commonly geological disasters. economic losses caused by landslides which was induced by natural or human engineering activities in every year exceed billions of dollars. In danba substation in highway large landslide as the research object, the landslide formation mechanism, the deformation and failure characteristics and failure modes of system research, based on this, puts forward the comprehensive improvement measures of landslide.First, analyzed the regional geological environment and engineering geological condition of landslide, and through the engineering geological mapping, drilling, well integrated exploration means such as pit ascertain the scope of landslide, slope material composition, structure and space distribution characteristics, and according to the micro morphological characteristics, deformation and failure characteristics, landslide sliding direction and the object of different threat, the landslide is divided into strong deformation zone (Ⅰ area), the weak deformation zone (Ⅱ-1, Ⅱ-2) and sliding zone (Ⅲ area).Secondly, on the basis of analysis of landslide deformation monitoring data, analyses the formation mechanism of the landslide, and analyzes the influence factors of landslide stability. Think: the poor environmental geological conditions, including high and steep slope, thick loose debris, is the geological basis, the landslide deformation and destruction of the larger rainfall is speeding up the slope deformation, increase the degree of deformation and failure, is the main influencing factors of landslide, the human is not reasonable excavation slope cutting is the main inducing factors of landslide deformation slip.Thirdly, according to the results of deformation analysis and stability calculation, natural conditions, the landslide unstable～basically stable, whole front slump area will continue to expand. Under heavy rain conditions, the landslide instability. Direct threat object for white xia substation approach roads, and landslide Ⅱ-2area has threatened to slope bottom5building houses, more than50people.Finally, according to the landslide formation mechanism, deformation, the failure mode and failure characteristics of the combination of topography and stratum structure, at the same time, considering the threat object arena for substation, roads, and lower part of landslide5building houses, more than50person, put forward the "anchor+intercepting ditch+lattice (anchor rod, anchor cable)" of the comprehensive improvement scheme.