| 講演要旨(和文) | | スウェーデン式サウンディング試験機の孔を利用して電気検層ができる装置を開発した。2cm間隔に56個の電極を設置して、孔壁にスポンジとプラスチック板で圧着して測定を行う。測定は複数の電極間隔で行い、埋設構造物基礎などの異物を垂直探査のρ-a曲線などを使って異物の深度を容易に判別が可能である。用途は、鉄塔や橋梁の基礎形状調査、干潟堆積物の厚さ分布、汚染土壌の調査に適している。ボーリング孔を使用しないため、安価で高精度かつ効率的な調査が可能になった。 |
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| | 講演要旨(英文) | | Electrical log system measured using the hole made by Swedish weight sounding test was developed. It measures by arranging 56 electrodes at 2cm interval to the plastic pipe surface, and forcing electrodes on the wall of a hole with sponge and plastic boards. By measuring apparent resistivity using much electrode spacing, it becomes possible to judge easily the depth of the laying-under-the-ground structure foundation. The use is suitable for basic form investigation of a steel tower or a bridge, a thickness distribution of a tidal flat sediment, and investigation of pollution soil. Since the hole excavated by drilling was not used, cheap, highly precise, and efficient investigation was attained. |
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