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Article

Resistance of Laminar Drain Reinforcement Levee against Overflow Erosion

by 1,* and 2
1
Foundation & Geotechnical Engineering, Structures Technology Division, Railway Technical Research Institute, Tokyo 185-8540, Japan
2
Department of Civil Engineering, Faculty of Science and Technology, Tokyo University of Science, Chiba 278-8510, Japan
*
Author to whom correspondence should be addressed.
Water 2019, 11(9), 1768; https://doi.org/10.3390/w11091768
Received: 26 July 2019 / Revised: 9 August 2019 / Accepted: 20 August 2019 / Published: 25 August 2019
(This article belongs to the Section Hydraulics and Hydrodynamics)
As a method for reinforcing against overflow erosion and infiltration, this study investigated a laminar drain reinforcement (LDR) levee, in which the drain layers are set on the back slope and connected to concrete panels using geogrid layers. We examined the resistance against overflow erosion of the LDR levee by large-scale model tests with a 1 m high model levee. We also compared the resistance of an armored levee, which is covered with concrete panels, and a GRS (geosynthetic-reinforced soil) levee, in which the geogrid layers are laid in the levee body with connecting concrete panels. The results of the model tests reveal that: (1) the LDR levee can maintain the initial height and shape for more than 150 min; by comparison, the times to levee failure were 87 and 102 min for the armored and GRS levees, respectively; (2) the LDR levee was shown to have a highly tenacious structure offering resistance to overflow erosion. In particular, panels easily flowed out with a slight gap (less than 1 cm) for the armored levee, while the LDR levee was able to prevent flowing out of panels and the erosion of the levee body, thanks to the laminar drain at the back slope, even when the gaps between the surface panels exceeded 5 cm. View Full-Text
Keywords: river levee; overflow; erosion; infiltration; model test; breach; geogrid; drain; flood river levee; overflow; erosion; infiltration; model test; breach; geogrid; drain; flood
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MDPI and ACS Style

Kurakami, Y.; Nihei, Y. Resistance of Laminar Drain Reinforcement Levee against Overflow Erosion. Water 2019, 11, 1768. https://doi.org/10.3390/w11091768

AMA Style

Kurakami Y, Nihei Y. Resistance of Laminar Drain Reinforcement Levee against Overflow Erosion. Water. 2019; 11(9):1768. https://doi.org/10.3390/w11091768

Chicago/Turabian Style

Kurakami, Yuki, and Yasuo Nihei. 2019. "Resistance of Laminar Drain Reinforcement Levee against Overflow Erosion" Water 11, no. 9: 1768. https://doi.org/10.3390/w11091768

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