NUMERICAL ANALYSIS ON NEW DIKE BACK SLOPE SHAPE TO REDUCE SCOURING AT THE LANDWARD TOW CAUSED BY THE TSUNAMI OVERFLOW
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- ISHIKAWA Masanori
- パシフィックコンサルタンツ(株) 大阪国土保全事業部
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- KOZUKI Yasunori
- 徳島大学 大学院理工学研究部
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- YAMANAKA Ryoichi
- 徳島大学 大学院理工学研究部
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- OKUBO Yosuke
- パシフィックコンサルタンツ(株) 港湾部
Bibliographic Information
- Other Title
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- 津波による越流洗掘を低減する新しい堤防裏法面形状に関する考察
- ツナミ ニ ヨル エツリュウ センクツ オ テイゲン スル アタラシイ テイボウリノリメン ケイジョウ ニ カンスル コウサツ
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Abstract
Most of coastal structures, especially coastal dikes were destroyed by the 2011 Tohoku Tsunami. It was reported that one of the most important causes was the failure of back slope of dikes due to scouring.<br> It was effective to drain into the landside as possible smoothly in examining the robustness of the dike for the tsunami. In this study, a numerical model using CADMAS-SURF/3D has been applied to clarify the difference of tsunami external force toward back slope of dikes due to structure specification and to make suggestions for mechanism of robustness and design of coastal dikes. As a result, in order to restrain scouring at back slope of dikes, excepting method of moderating the back slope, streamline at top of inner slope and back slope were proposed.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72 (2), I_1141-I_1146, 2016
Japan Society of Civil Engineers