论文?报告
| No. | タイトル?执笔者 |
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| 4 | |
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近年、既存杭を撤去した后に新设の杭を施工する事例が増加している。既存杭撤去后の杭孔の埋戻し方法には确立された工法がないのが现状であるため、今回、既存杭を撤去し埋戻した现场での调査および室内配合试験を実施した。现地调査の结果、埋戻しの搅拌工法や施工法によらず、目标强度に达しない部分や、强度のバラツキが大きいケースがあった。室内试験では、电気比抵抗による地盘改良の品质管理手法が埋戻し箇所にも适用できる可能性があることを确认した。 キーワード: 埋戻し、既存杭撤去、现地调査、改良土、电気比抵抗 |
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There are increasing cases of removing existing piles before constructing new piles, in recent years. There is no established method for backfilling holes after removing existing piles. Therefore, site investigations where existing piles were removed and backfilled, and laboratory tests using field samples were conducted. As a result of the site investigations, it was confirmed that the strength at some part was less than the target one and that the variation of strength was large, regardless of the agitation method and construction method for backfilling. Laboratory tests showed that there is a possibility that the quality control method of ground improvement by electrical resistivity can be applied to the backfilling. Key Words: backfilling, removal of existing p ile, s ite investigation, improved soil, electrical resistivity |
概要