outline-level: 2" class=MsoNormal>Investigation of a High Speed and Long Run-Out Rockslide-Debris Flow at Dazhai in Guanling of
详细信息
- 责任者：Yin Yueping (China Geological Survey ; Beijing 100035 ; China) ; Zhu Jiliang
- 刊名：Journal of Engineering Geology
- 出版年：2010
- 卷期：18(4)
- 关键词：滑坡 ; landslides ; 贵州 ; Guizhou Province
- 页码：p.445-454
- 图表：13 illus., 3 tables, 8 refs.
- 分类号：1800
- issnNo：ISSN1004-9665
- isbnNo：CN11-3249/P
摘要
On June 28, 2010, due to sudden heavy rainfall, a high speed and long run-out rockslide-debris flow occurred at Dazhai in Guanling of Guizhou Province. The landslide was located at the coal-related sedimentary rock strata area. This rock system commonly presents in southwestern China. Analysis indicates that the runoff in valley streams were two times more than those during usual rainfall at the region. The large runoff water formed static groundwater pressure and seepage pressure in joints and fossils of the sandstones at the landslide source zone, which led the landslide to occur. The runoff was formed in stream valleys, which became a layer of saturated water bed for the rock debris to flow long distance. As a result, the run-out distance and the speed of the rock debris flow were evidently increased.