| The identification of translational landslide is difficult, happening is very subtle; the deformation mechanism is very complex and considerable controversy; disaster model is bizarre, disaster prevention is difficult and risk is high. The formation conditions of the landslide which collapsed in near the translational of large rock is controversial. So the research results of the landslides is very meaningful to analysis the deformation mechanism of the landslides of this kind; And for such concealment of strong, harm big landslide monitoring the establishment of early warning system to provide theoretical support.And provide theoretical support for such landslides of strongly concealment, big harm to monitoring the establishment of early warning system.Through the field survey, misering, geophysical exploration,monitoring and the interpretation based on remote sensing images, this article elaborated the geological environmental conditions and the basic characteristics of KuaLiangzi landslide in detail,and district the landslide area in accordance with the defomation characteristic of the landslide, and find out the deformation histories of this landslide.Have made the system analysis and the macroscopic judgement to the influence factors of landslide's formation and the origin mechansm of the major landslide area. Have analysised the collapse mechanism of deformation of each stage in the qualitative and quantitative analysis. Have verified the horizontal pushing sliding mode in rainstorm conditions through numerical simulation and physical modeling analysis of this landslide; and introducing rheological mechanics principle to explain the causes of this landslide which is creeping l in daily stageThe research results mainly includes:(1)According to the deformation and damage of the earth's surfure of KuaLiangzi landslide,to divide it into three regions from south to north , which is divided into cut export order with small landslide, collapse belt as the main deformation characteristics of the landslide inⅠarea, The arch on regional upward as the main deformation characteristics of the landslide inⅡarea and pool formation, without apparent control landslideⅢarea of catchment conditions. (2) According to investigation, presents theⅡzone determine the landslide decoder for 1949 destructive process of main severe storms occur along the shallow slide surface with sliding horizontal pushing and 1981 severe storms along the deep sliding surface when massive horizontal pushing sliding mass destruction twice.(3) Through the analysis of the landslide classification, block sliding failure process, reasonable explains pull the causes of the existing form stuck slot.(4) First discovered the two failure mode,which are horizontal pushing sliding during heavy rains and creeping in daily of the landslide.(5)Adopts critical head height computation and pull trapped groove depth contrast, numerical simulation and physical modeling analysis validat the horizontal pushing methods in heavy rains of the landslide collapsed; Through stability calculation of theⅠarea which is creeping with introducing the rheological mechanics principle and the long-term strength parameters of the slide soil and reasonably explained the phenomenon of creeping occurred in nearly horizontal rock slope. |
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