Dynamic Behavior of Anchorage Landslide under Earthquake

In this research, large-scale shaking table model test was conducted to study dynamic behavior of anchorage landslide under earthquake. Failure form of landslide soil, acceleration response and stress mechanism of pressure type anchor were analyzed respectively. The results indicate that: cracks of soil occurred mainly in the bottom and top of landslide: at low loading amplitude, shearing crack in slope toe appeared firstly; at high loading amplitude, top soil in landslide was seriously destructed; at last, large area of block-form soil were shot to the table. After many times of stimulation, the first order natural frequency of this model declined slowly, then increased, and finally tended to stabilize. With the increase of loading amplitude, acceleration response increased more obviously, and had elevation amplification effect. For different anchors, at low and medium loading amplitude, stress of the top anchor and the bottom anchor were bigger than other anchors, while at high loading amplitude, the second anchor was also very large. For the same anchor, like static loading condition, measured point stress near bearing plate was the biggest. The results could provide a reasonable foundation for the design of the anchors under earthquake.