| dc.description.abstract | The plain of west Taiwan is soft alluvium ground with high ground water level. Moreover, Taiwan is located at Circum-Pacific seismic belt, earthquakes usually occur and leading to soil liquefaction especially for the alluvium ground. At two sides of river, the embankment built on the liquefiable ground would cause significance damage during earthquake. Therefore, it needs to be understood the failure behavior of a gentle slope by soil liquefaction or lateral spreading.
Several centrifuge shaking table tests were performed to simulate the behavior of embankment which construct on the liquefiable ground. The effects of soil liquefaction on the response of embankment are discussed. Test results show that liquefaction occurs in sequence from soil surface to deep soil layer when model subject an unequal-amplitude sinusoidal wave. In saturated inclined ground model, the acceleration amplitude is asymmetry due to static stress. In dry models, there is only immediate settlement of embankment cause by shaking. However, in saturated models, it includes immediate settlement cause and consolidation settlement cause by soil liquefaction, and the total settlement in saturated models is 10 to 15 times of total settlement of dry models. Moreover, embankment settles uniformly in all tests, and the settlement values are very close between flat and inclined ground, so the effect is slightly whether the ground is inclined or not. However, lateral spreading occur when soil liquefied in inclined ground model, therefore embankment also slide away for 1 meter on horizontal direction. | en_US |