A fluidized landslide on a natural slope by artificial rainfall
A fluidized landslide on a natural slope by artificial rainfall
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DOI：
10.1007/s10346-004-0030-4
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发表时间：
2004-09-01
期刊：
影响因子：
6.7
通讯作者：
Sassa, Kyoji
中科院分区：
文献类型：
--
作者：
Ochiai, Hirotaka;Okada, Yasuhiko;Sassa, Kyoji
在日本茨城县大和村茅场山的天然斜坡上进行了人工降雨引发流化滑坡的实验。实验坡长30 m，宽5 m，平均坡度33°。降雨强度为 78 毫米/小时的洒水开始后 24,627.5 秒（410 m/27.5 秒）发生山体滑坡。滑坡体长 14 m，深 1.2 m（最大）。先是滑动，然后流态化，变成了泥石流。 17秒内移动距离达到50m。流化滑坡的表观摩擦角为16.7度。通过土壤应变探针检测滑动表面的形成。通过立体摄影测量确定失败滑坡体表面的运动。
An experiment to induce a fluidized landslide by artificial rainfall was conducted on a natural slope at Mt. Kaba-san in the village of Yamato, Ibaraki Prefecture, Japan. The experimental slope was 30 m long, 5 m wide, and the average slope gradient was 33 degrees. A landslide initiated 24,627.5 s (410 m/27.5 s) after the start of sprinkling at a rainfall intensity of 78 mm/h. The landslide mass was 14 m long and 1.2 m deep (at maximum). It first slid, then fluidized, and changed into a debris flow. The travel distance was up to 50 m in 17s. The apparent friction angle of the fluidized landslide was 16.7 degrees. Formation of the sliding surface was detected by soil-strain probes. Motion of the surface of the failed landslide mass was determined by stereo photogrammetry.