本研究利用國立中央大學的地工離心機進行邊坡受震引致滑動破壞的離心模型試驗，試驗包含兩種不同邊界條件的邊坡，有別過去的三邊圍束模擬平面應變的邊界條件，製作單邊圍束與無圍束狀態下的離心模型邊坡試體進行離心振動台試驗。試驗材料以砂土 (60%) 和石英質粉土 (40%) 進行混合，並採用最佳含水量(O.M.C.)為11%的條件來製作離心模型，試驗過程中慢慢增加重力場直至離心模型發生破壞，且觀測邊坡在震動作用下的破壞行為。 ;Landslide is one of the most dangerous disasters in mountainous areas. Landslide can not only easily destroy houses, roads, but also endanger the lives and properties of residents. It’s difficult to predict when the Landslide would happen. Many researchers are studying how to collect and analyze some signs in order to notify the neighboring people before the Landslide occur. Therefore, it is necessary to understand what areas and what kind of soil compositions have high potential of Landslide. In the previous study, the 1g scaled modelling was often used in the model to explore the situation when Landslide occurred. However, we could not reproduce the same damage range and the total amount of soil and rock washed down in the 1g scaled modelling.
In this study, the physical modelling of slope failure has been carried out in the geotechnical centrifuge shaking table at NCU. The centrifuge models were prepared with one contact interface and without contacting to container to simulate the 3-dimensional situations, which was different from the plan-stain condition with three contact interfaces with container in past studies. Focused on slope sliding at different boundary conditions. The slope models were prepared by mixing sand (60%) and silt (40%) and compacting at optimum water content. During the test, the artificial acceleration was gradually increased until slope failure occurred to observe the slope behaviors under shaking.
