Research Of Numerical Simulation Of Landslide Hazard Prediction Of Island

Landslide hazard has its own characteristics ,which varied with geological environment,economical process and human engineering. On search and research island landslide of Fujian area, collect the geological and geotechnical engineering information, the title sum up the feature of local geological environment,and generalize the cause and factor of influence. By an example, a special model is established, and studied by LEM and FEM.At last, we discuss the mechanism and influence from excavation and rainfall. Sum up the characteristics of local landslide, discuss the landslide hazard prediction model in island area. 1 The author summarize local geological condition of island and factor of landslide,such as geometry, geotechnical engineering and dynamism.Point out that characteristics of soil-like slope different from soil slope,which is the important base of landslide hazard prediction. 2 Base on the fact that it is important condition to searching the most possible sliding surface for landslide hazard prediction of LEM. The author summarize advantage and disadvantage of LEM, furthermore, puts forward optimization method for slip surface ——golden section method. Varied methods are applied to analysis and predict the landslide characteristics under different engineering conditions 3 The excavation is simulated by FEM, discussing the effect to slope from excavation and unloading. And make quantitative prediction to the landslide process. 4 Based on unsaturated seepage model, some storage function estimation methods and conductivity function estimation methods are discussed in the title, furthermore we get transient seepage model and the characteristics under varied geological condition. 5 Matrix suction is calculated in stability analysis, seepage flow is calculated in LEM, and trend of safety coefficient ,soil properties varied with rainfall is discussed in the title. The result reveal that matrix suction varied with infiltration 6 Combine FEM with LEM, we can get the safety coefficient on the strength theory of unsaturated soil, deference between them is discussed.