Calculation and hydraulic model experiments for the stable weight of rubble-mound considering the overflow and seepage flow

• Inoue Shota

  Kyushu University

• Kasama Kiyonobu

  Kyushu University

• Hirasawa Mitsunari

  Kyushu University

• Zen Kouki

  Kyushu University

• Furukawa Zentaro

  Kyushu University

• Yahiro Yuichi

  Kyushu University

抄録

When The Tohoku-Pacific Ocean Earthquake occurred on the March 11th, 2011, harbor facilities such as breakwaters and tide embankments suffered serious damages from the Tsunami. The following three mechanisms are considered to be related to the collapse of the breakwater: 1) scouring of the mound due to overflow, 2) the horizontal force originated from the difference of water level between the sea side and the harbor side on the breakwater, and 3) reduction of bearing power of the mound resulting induced by seepage flow. However, the mechanism of the instability of the rubble-mound by overflow and seepage flow induced by tsunami is not fully clarified. In this study, the formula to calculate the stable weight of rubble-mound was proposed in consideration of the overflow and seepage flow, and hydraulic model experiments were conducted on Kamaishi Bay breakwaters as the subject in order to confirm the effectiveness of the proposed formula. Using the results, the stability of the breakwater was evaluated from the geotechnical engineering point of view.

収録刊行物

• Japanese Geotechnical Society Special Publication

  Japanese Geotechnical Society Special Publication 1 (6), 58-62, 2015

  公益社団法人 地盤工学会

キーワード

• breakwater
• overflow
• seepage flow
• rubble-mound
• stable weight
• tsunami

詳細情報

• CRID: 1390282680741480064
• NII論文ID: 130005095790
• DOI: 10.3208/jgssp.jpn-29
• ISSN: 21888027
• Web Site: https://www.jstage.jst.go.jp/article/jgssp/1/6/1_JPN-29/_pdf
• 本文言語コード: en
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