FAILURE MECHANISM OF CONVENTIONAL DIKE UNDER OVERFLOW TSUNAMI
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- MATSUSHIMA Kenichi
- 国立研究開発法人農研機構 農村工学研究所
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- MISHIMA Naoto
- 国立研究開発法人農研機構 農村工学研究所
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- KIRI Hirohide
- 国立研究開発法人農研機構 農村工学研究所
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- NAKA Tatsuo
- 国立研究開発法人農研機構 農村工学研究所
Bibliographic Information
- Other Title
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- 越流津波に対する従来型式の海岸堤防の被災メカニズム
- エツリュウ ツナミ ニ タイスル ジュウライ ケイシキ ノ カイガン テイボウ ノ ヒサイ メカニズム
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Abstract
In order to elucidate the failure mechanism of damaged coastal dikes by the Great East Japan Earthquake tsunami, hydraulic overflow tests were carried out with using dike prototypes that replicated reduced impermeable condition of joint concrete due to earthquake on one hand and that of which did not in the other. As a result, overflow water intruded under the land-side cover concrete, pushing it out due to the pressure of muddy water with the case of deteriorated impermeability even though the intensity of overflow was relatively small. Likewise, it was found that the land-side cover concrete was torn off by uplift force when overflow depth exceeded about 5.0 m. Thus, given the damaged condition of joint concrete, countermeasures to prevent concretes from tearing off, as well as to protect from getting soggy condition of backfill were necessary to ensure further durability.
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) 71 (2), I_1123-I_1128, 2015
Japan Society of Civil Engineers
