STATIC AND DYNAMIC ANALYSIS OF MANSA DEVI LANDSLIDE USING FLAC'D AND DEM

Abstract

Recent advances in the characterization of complex rock slope deformation and failure using numerical techniques have demonstrated significant potential for furthering our understanding of both the mechanisms/processes involved and the associated risk. Slope movements (e.g. landslides) are dynamic systems that are complex in time and space and closely linked to both inherited and current preparatory and triggering controls. It is not yet possible to assess in all cases conditions for failure, reactivation and rapid surges and successfully simulate their transient and multi-dimensional behaviour and development, although considerable progress has been made in isolating many of the key variables and elementary mechanisms and to include them in physically-based models for landslide hazard assessments. Stability analyses are routinely performed in order to assess the safe and functional design of an excavated slope (e.g. open pit mining, road cuts, etc.), and/or the equilibrium conditions of a natural slope. The analysis technique chosen depends on both site conditions and the potential mode of failure, with careful consideration being given to the varying strengths, weaknesses and limitations inherent in each methodology. Landslides are natural hazards that are frequently responsible for considerable losses and are subsequently considered among the most serious geologic hazards, which play havoc in many parts of the world and have high socioeconomic significance. Literature review consists of description of basic landslide processes, types, causes, related issues, corrective measures, and various investigation methods. Furthermore, detailed investigations have been discussed prior to studying various deformation models for landslide. Various models, viz., dynamic, static, kinematic, congruence and identity models have been discussed A broad review is presented of the role of Numerical technique method in geotechnical engineering.