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Robbins, B.A. (author), Sharp, M.K. (author), Corcoran, M.K. (author)The U.S. Army Engineer Research and Development Center (ERDC) is conducting research to investigate internal erosion, specifically backward erosion piping, by use of laboratory-scale model testing to understand and properly capture the physics of the problem. Preliminary results show that lower void ratio models, using poorly-graded soils with a...conference paper 2015