Survey of Damage on Spillway Concrete Structures by The 2008 Iwate-Miyagi Inland Earthquake

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  • SASAKI Takashi
    (前)国土交通省 東北地方整備局 胆沢ダム工事事務所
  • OYAMA Yukio
    国土交通省 東北地方整備局 胆沢ダム工事事務所
  • SATOH Akira
    国土交通省 東北地方整備局 胆沢ダム工事事務所
  • SHISHIDO Yoshihiro
    (前)国土交通省 東北地方整備局 胆沢ダム工事事務所

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Other Title
  • 岩手・宮城内陸地震による胆沢ダム洪水吐き被害の調査・分析
  • イワテ ミヤギ ナイリク ジシン ニ ヨル イサワ ダム コウズイハキ ヒガイ ノ チョウサ ブンセキ

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Abstract

The Isawa Dam is an earth center core type rockfill dam and the dam body has been under construction. At 8:43 a.m. on June 14 of 2008, an earthquake which epicenter was located in the southern part of Iwate prefecture and 10km away from the Isawa dam was occurred. The earthquake caused damages on the dam body and the spillway of the Isawa Dam. As regards the spillway, the cracks of the structures, the damages on the foundation, etc. were occured. This paper reports the characteristics of the cracks induced by the earthquake and the investigation method, and discusses the causes of the damages.Keywords: The Iwate-Miyagi Nairiku Earthquake in 2008, spillway, crack, investigation, repair work

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