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Population Structure and Reproductive Biology of the Endangered Crab Deiratonotus japonicus (Brachyura, Camptandriidae) Surveyed for Nine Years in the Kita River, Japan

Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill

Department of Civil and Environmental Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
Central Japan Railway Company, JR Central Towers, 1-1-4, Meieki, Nakamura-ku, Nagoya 450-6101, Japan
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2020, 8(11), 922;
Received: 30 October 2020 / Revised: 8 November 2020 / Accepted: 12 November 2020 / Published: 15 November 2020
(This article belongs to the Section Coastal Engineering)
Tsunamis can seriously damage bridges in coastal areas. Studies of such damage have elucidated the action of tsunami-induced forces on girders. However, tsunami-induced erosion of bridge-abutment backfill has been largely neglected. This article investigates this little-studied topic using hydraulic model experiments and numerical analyses. The results show that a tsunami erodes the backfill close to the abutment; the scale of the erosion increases with the duration of the tsunami. By contrast, the backfill on the far side of the abutment remains relatively intact. This suggests that the presence of the abutment accelerates the erosion of the backfill in its vicinity. A numerical simulation shows that the tsunami erodes the oval conical part of the backfill on the landward side of the onshore wing. When the erosion reaches the lower end of the wing the backfill begins to flow out from underneath. Thus, an increase in the soil-cover depth of the onshore wing might help slow down the erosion. View Full-Text
Keywords: tsunami; bridge abutment; backfill; erosion tsunami; bridge abutment; backfill; erosion
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MDPI and ACS Style

Nakamura, T.; Nakai, Y.; Cho, Y.-H.; Mizutani, N. Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill. J. Mar. Sci. Eng. 2020, 8, 922.

AMA Style

Nakamura T, Nakai Y, Cho Y-H, Mizutani N. Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill. Journal of Marine Science and Engineering. 2020; 8(11):922.

Chicago/Turabian Style

Nakamura, Tomoaki, Yuto Nakai, Yong-Hwan Cho, and Norimi Mizutani. 2020. "Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill" Journal of Marine Science and Engineering 8, no. 11: 922.

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