| 講演要旨(和文) | | ダム基礎の一部に地質時代のゆるみが分布することが想定される施工中のコンクリートダムにおいて，日常的に行うダム基礎岩盤評価にEM探査を適用した．探査の有効性検証は，EM探査結果と地山状況，ボーリング等による事前地質調査結果および電気探査結果と対比して行った．その結果，探査の精度的な課題も確認されたが，地山状況と調和的なデータも得られた．ピックアップを設置する必要がなく解析も比較的短時間で行うことができる簡便手法であるEM探査を施工管理的に用いることはメリットが多いと思われ，今後継続的に計測を実施し探査精度の検証と比抵抗によるゆるみ評価技術を構築したい． |
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| | 講演要旨(英文) | | It's assumed that looseness in geologic age is distributed over the part of the dam foundation, an EM investigation was applied to the dam foundation rock evaluation performed daily in the concrete dam which is being built. Validity inspection of an investigation was performed compared with a preliminary geological survey result and an electric prospecting result by an EM investigation result, natural ground circumstances and bowling, etc.. As a result, the precision-like problem of an investigation was also confirmed, but the natural ground situation and harmonized data were also obtained. It isn't necessary to install a pickup and when there are a lot of merits, to use the EM investigation which is the simple method it's possible to analyze relatively by a short time like a construction management seems, and I'd like to measure and build looseness evaluation technique by inspection and a specific resistance of the investigation precision continually from now on. |
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