Experimental Studies on Regressive Erosion of Piping in Double-Layer Levee Foundation

Kai Jia; Hong Cao; Min Han Luo

doi:10.4028/www.scientific.net/AMM.501-504.32

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 501-504Experimental Studies on Regressive Erosion of...

Experimental Studies on Regressive Erosion of Piping in Double-Layer Levee Foundation

Abstract:

Seepage piping seriously threatens the safety of levee, but study on mechanism of regressive erosion is not in-depth. According to the characteristics of piping channel upstream movement, we designed a set of experiment equipment. In given experiment condition, we did the experiments with 2 kinds of overburden and 2 different position of piping channel, and measured the value of each piezometric tube. As the experiment results shows, the tip hydraulic gradient can better reflect the problems of regressive erosion, comparing with average hydraulic gradient between piping exit and outer river. The development of the regressive erosion is determined by the tip hydraulic gradient. It will stop expanding when the tip hydraulic gradient decreases after large-scale upstream movement. This paper lays a foundation for further theoretical study.

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Periodical:

Applied Mechanics and Materials (Volumes 501-504)

Pages:

32-37

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.501-504.32

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Online since:

January 2014

Authors:

Kai Jia, Hong Cao*, Min Han Luo

Keywords:

Double-Layer Levee Foundation, Piping Erosion, Regressive Erosion, Sandbox Modeling, Tip Hydraulic Gradient

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* - Corresponding Author

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