Inspection of Construction Joint in Concrete Dam Body by Impact Elastic Wave Method

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  • 衝撃弾性波法を用いたコンクリートダム堤体の水平打継面調査
  • ショウゲキ ダンセイハホウ オ モチイタ コンクリートダムテイタイ ノ スイヘイ ウチツギメン チョウサ

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Abstract

<p>The deterioration of the construction joint is an aging phenomenon of the concrete dam. This deterioration may affect the stability of the dam body. The investigation by a boring survey is a general method of verifying the deterioration of the construction joint in the dam body. But the investigation by a boring survey has several problems. In order to solve this problem, we have devised the method for estimating the state of the construction joint by using the results of the investigation by the impact elastic wave method. We have estimated the state of construction joint by focusing on the transmission and reflection characteristics of the elastic wave in deteriorated surface. By using this non-destructive investigated method, we were able to ascertain the deterioration area of construction joint in the concrete dam body.</p>

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