Abstract：The gravel and pebble is a common kind of coarse-grained soil in the riverbed of hydropower project，but its engineering properties have a significant impact on the layout of the dam project while its thickness is much large. The study object is the gravel layer deposited lately in Shangjiang to Qizong river reach riverbed of Jinsha River，which is much thick. The study employs some comprehensive methods，such as exploration，grain size analysis，in-situ tests，and laboratory tests of physico-mechanical properties for imitated gradation sample，and find out that this layer has the frame from coarse grains and some geological characteristics of this layer，such as much high bearing capacity，shear resistance，modulus of deformation and elasticity，and moderate to heavy permeability. This paper discusses the engineering geological problems from different plans while using this layer or clearing it. The study result provides the geological basis for the study of building dam on the gravel layers，and there is a certain reference value for similar projects and the soil mechanics study.
王启国. 水电工程坝基砾卵石层工程地质特性研究[J]. 岩石力学与工程学报, 2011, 30(S2): 3671-3680.
WANG Qiguo. STUDY OF ENGINEERING GEOLOGICAL
CHARACTERISTICS OF GRAVEL PEBBLE LAYER FOR DAM FOUNDATION OF HYDROPOWER PROJECT. , 2011, 30(S2): 3671-3680.
刘 杰，谢定松，崔亦昊. 江河大堤堤基砂砾石层管涌破坏危害性试验研究[J]. 岩土工程学报，2009，31(8)：1 188-1 191.(LIU Jie，XIE Dingsong，CUI Yihao. Destructive tests on piping failure of sandy gravel layer of river dikes[J]. Chinese Journal of Geotechnical Engineering，2009，31(8)：1 188-1 191.(in Chinese))
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2011, Vol. 30 
