LOAD-UNLOAD DYNAMIC LAW OF GROUNDWATER LEVEL AND DYNAMIC DISPLACEMENT PREDICTION OF DEBRIS LANDSLIDE—— A CASE STUDY OF BAZIMEN LANDSLIDE IN THREE GORGES RESERVOIR
Abstract：On the basis of the systematic analysis of the dynamic displacement factors and destabilized mechanism of debris landslide induced by water，the dynamic action and its response law of groundwater in the process of the dynamic stability evolution of the slope are systematically analyzed. It is discovered that the displacement and destabilization of the debris landslides induced by water are directly controlled by the variation of groundwater quantity；and its displacement law has corresponding relation with the change quantity of groundwater. According to the above analytical results and the principle of the load-unload response ratio theory，the theories that the monthly change of groundwater table can be taken as the load-unloaded parameter of debris landslide and its displacement velocity and acceleration rate can be taken as the response parameter to load-unload are proposed. Thus，the dynamic displacement parameters and dynamic prediction model of the load-unload response ratio of the groundwater table are determined. Meanwhile，taking the typical debris landslide of the Three Gorges Reservoir region—Bazimen landslide for example，the load-unload response ratio of the key monitoring points SZK1 and SZK4 of Bazimen landslide are calculated by means of the load-unload response ratio model of the groundwater table. The computation results show that the curves of load-unload response ratio of monitoring points SZK1 and SZK4 agree with the dynamic evolution law of the slope stability. All the above-mentioned results show that the groundwater table dynamic model of the load-unload response ratio can be used to perform the complete dynamic prediction of the debris landslides.
