Experimental Study on Stability of Coastal Levee with Double-Row Steel Sheet Piles under Extreme Storm Surge
Publication: Geo-Extreme 2021
ABSTRACT
A new reinforcement measure, double row steel sheet piles, is proposed to keep the safety of coastal levees under the action of the extreme storm surge. Large-scale flume experiments, considering variable wave height, were used to study the dynamic behavior of embankment-pile system, including erosion, stress, and deformation. When the wave height is relatively low, a stable eroded surface would incur on the upstream slope of the embankment. When the wave height is relatively high, it would overtop the embankment and erode the crest and downstream slope, leading to significant deformation and stress in both outer and inner row piles. Despite large deformations, the levee with the support of the double-row steel sheet piles system did not fail. While, the same levee without the protective was almost completely eroded, which indicated the significant protection effect of pile structure. Under overtop condition, the downstream slope was eroded soon after the start of overtopping. Under surge wave condition, erosion proceed at the upstream first. When the embankment is protected by double-row sheet piles, less erosion of the soil would occur, and the embankment could be more recoverable after overtopping or extreme storm surges.
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Geo-Extreme 2021
Pages: 425 - 434
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© 2021 American Society of Civil Engineers.
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Published online: Nov 4, 2021
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