%0 Journal Article
	%A K. Vandenboer and  L. Dolphen and  A. Bezuijen
	%D 2017
	%J International Journal of Geotechnical and Geological Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 129, 2017
	%T Backward Erosion Piping through Vertically Layered Sands
	%U https://publications.waset.org/pdf/10007839
	%V 129
	%X Backward erosion piping is an important failure mechanism for water-retaining structures, a phenomenon that results in the formation of shallow pipes at the interface of a sandy or silty foundation and a cohesive cover layer. This paper studies the effect of two soil types on backward erosion piping; both in case of a homogeneous sand layer, and in a vertically layered sand sample, where the pipe is forced to subsequently grow through the different layers. Two configurations with vertical sand layers are tested; they both result in wider pipes and higher critical gradients, thereby making this an interesting topic in research on measures to prevent backward erosion piping failures.
	%P 766 - 769