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The July 14, 2003 Qianjiangping landslide,Three Gorges Reservoir,China |
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| Authors: | |
| Institution: | (1) Disaster Prevention Research Institute, Kyoto University, Gokasho, 611-0011 Uji Kyoto, Japan;(2) Environmental Geology Section, Yichang Institute of Geology and Mineral Resources, China Geological Survey, Gangyao Road 37, 443003 Yichang, China;(3) Geotechnical Engineering Group, Graduate School of Natural Science and Technology, Kanazawa University, Kodatsuno 2–40–20, 920–8667 Kanazawa, Japan |
| Abstract: | The Qianjiangping landslide occurred after the first impoundment of the Three Gorges Reservoir in July 2003. Field investigation revealed that failure occurred when the reservoir reached 135 m, but the stability of the affected slope was already reduced by pre-existing bedding-plane shears, quarrying of mudstone from the landslide toe, and previous heavy rain. A possible explanation of the rapid and long runout mechanism of the landslide is that movement on a bedding-plane shear ruptured the calcite cement and rapidly reduced the sandstone strength to residual shear strength. |
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