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《Journal of Engineering Geology》 2008-04
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PRELIMINARY ANALYSIS OF FORMATION MECHANISM AND STABILITY OF AN ACCUMULATION BODY AT XIAZANRI ABOVE LIYUAN WATER HYDROPOWER STATION ON JINSHA RIVER

ZHANG Ming HU Ruilin(Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029)  
Stability of the accumulation body at Xiazanri is very important to the establishments of the Liyuan hydropower station on the Jinsha River.This station is to be built..Based on field reconnaissance material of the Xiazanri accumulation body,the paper studies its formation mechanism and stability.The results show that it is a complex accumulation body which comprises moraine,alluvium,lake sediment and colluvium and has gone through 2 ice ages,i.e.,the Jinjiang ice age in middle pleistocene and the Lijiang ice age in middle Pleistocene.The results of stability assessment show the Xiazanri accumulation body is stable as a whole despite it can have some partial fallings.The key factors controlling whether it will be stable or instable are the stabilities of the loose gravel layer at the slope toe and the lake sediments.
【Fund】: "十一五"国家科技支撑计划项目(NO.2006BAC04B02);; 国家重点基础研究发展规划项目973(NO.2002CB412702)资助
【CateGory Index】: P642.2
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