Journal
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
Volume 86, Issue -, Pages 317-322Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijrmms.2015.04.001
Keywords
Soil-rock mixture; Direct shear test; Embankment dam
Funding
- Natural Science Foundation of China [51109117]
- Independent research plan of Tsinghua university [20111081125]
- State Key Laboratory of Hydroscience and Engineering Project [2013-KY-4]
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To improve the mechanical behavior of core wall in higher embankment dams, soil-rock mixture obtained by mixing rock blocks to the cohesive soil is used for the first time as the core wall material of the Nuozhadu embankment dam, China. The differences in the mechanical behavior of soil and soil-rock mixture samples are studied in depth. Two large-scale compaction test fields and a series of in-situ direct shear tests have been conducted on soil and soil-rock mixture samples. The mixing of rock blocks changes the deformation behavior of the sample. The existence of rock blocks makes the deformation modulus and the internal friction angle of soil-rock mixture greater than that of the soil sample, while decreasing its cohesive force. (C) 2015 Elsevier Ltd. All rights reserved.
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