Dynamic properties of earthquake-induced large-scale rapid landslides within past landslide masses
Dynamic properties of earthquake-induced large-scale rapid landslides within past landslide masses
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DOI：
10.1007/s10346-005-0055-3
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发表时间：
2005-05
期刊：
影响因子：
6.7
通讯作者：
K. Sassa;H. Fukuoka;Fawu Wang;Gong-hui Wang
中科院分区：
文献类型：
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作者：
K. Sassa;H. Fukuoka;Fawu Wang;Gong-hui Wang
在2004年的新潟县地震中，引发了数千次山体滑坡，其中两次大规模的快速山体滑坡（东竹泽和寺野山体滑坡）发生在过去的滑坡体中，并在滑坡的底部阻塞了河流，给社会带来了巨大的风险。对这两个滑坡进行了详细的现场调查。为了研究触发和运动机制，样品从这两个滑坡。利用环剪仪对试件进行了真实的地震波加载试验和循环荷载试验。试验结果表明，这两个滑坡的砂样都发生了滑动面液化现象，且最终的表观摩擦角很低，而寺野滑坡的粉土样没有发生液化破坏，表明这两个快速滑坡的滑动面一定是在过去滑坡体的砂层中形成的。
During the 2004 Mid-Niigata Prefecture earthquake, thousands of landslides were triggered, among them two large-scale rapid landslides (Higashi Takezawa and Terano landslides) occurred within past landslide masses and dammed the river at the toe of the landslides, posing great risks for the society. Detailed field investigation was performed on these two landslides. To examine the triggering and movement mechanisms, samples were taken from these two landslides. By using a ring shear apparatus, real earthquake wave loading test and cyclic loading tests were performed on these samples. The test results revealed that those sand samples from both landslides can suffer from sliding surface liquefaction phenomenon with very low final apparent friction angles, while the silt sample from Terano landslide showed no liquefaction failure, indicating that the sliding surfaces of these rapid landslides must have been formed within the sand layer in the past landslide masses.