| 講演要旨(和文) | | 産業技術総合研究所は，路面を傷つけずに，地盤の比抵抗を測定できる高周波交流電気探査装置を開発した．この技術は，路面下に敷設された水道管周辺の地盤の比抵抗を測定して，その水道管の腐食リスクを推定できる．近年，老朽化した水道管の劣化リスクを評価する技術の開発が喫緊の社会的課題になっている．水道管の腐食は地盤の比抵抗が低いほど進行しやすい．路面を掘削して土壌試料を採取して比抵抗を測定する調査があるが，コスト・時間・労力がかかり，これらを低減できる技術が必要とされていた．今回開発した技術は，路面から地盤の詳細な比抵抗を計測でき，水道管の腐食リスクを効率よく評価できる．この技術は，急増する老朽水道管更新の優先度の決定に寄与すると期待される． |
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| | 講演要旨(英文) | | Recently, corrosion of aging water pipes has become a big social problem and the development of assessment measures for their deterioration rate is an urgent issue. Corrosion risk of pipes closely relates to the electrical resistivity of the soil around them. Conventionally, it was measured using soil samples, however, it takes much costs, time and effort because it needs excavation through the paved road. AIST has developed a high-frequency AC resistivity survey system that can directly measure the resistivity of soil around buried water pipes from the pavement surface without excavating the road. The new method to efficiently assess the corrosion risk is expected to greatly contribute to determining the priority in replacing aging water pipes. |
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