| 講演要旨(和文) | | ボーリング孔を利用するサスペンションＰＳ検層は大口径の孔では測定が困難であった．我々は，大口径でも弾性波速度を検層できる新しいＰＳ検層プローブの開発を行った． まず，これまでのサスペンションＰＳ検層プローブを使用して，大口径となる場所打ち杭の掘削孔を利用して測定を行い，実用的な測定方法を検討した．その結果課題を解決できる新しいプローブが実用化でき，これまでのサスペンションＰＳ検層結果と変わらない測定ができたので報告する． |
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| | 講演要旨(英文) | | A suspension PS logging using bore hole was difficult to be applied to bore hole with large diameter. In this study, the authors developed a new PS logging probe which is possible to detect the velocity of elastic wave even for large bore hole. The authors measured the velocity of elastic wave using conventional PS logging probe at a large bore hole for cast-in-place, then examined a measurement method that is able to be applied to large bore hole without change of probe specification. As a result, a model of new PS logging probe to solve the problem came into practical and enabled to have same result as so far. |
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