JP6771177B2 - 薬液注入工法の施工管理方法 - Google Patents
薬液注入工法の施工管理方法 Download PDFInfo
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- JP6771177B2 JP6771177B2 JP2016040675A JP2016040675A JP6771177B2 JP 6771177 B2 JP6771177 B2 JP 6771177B2 JP 2016040675 A JP2016040675 A JP 2016040675A JP 2016040675 A JP2016040675 A JP 2016040675A JP 6771177 B2 JP6771177 B2 JP 6771177B2
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Description
2 地盤
3 薬液浸透域
4 拡張液浸透域
5 外殻固化体
6a,6b 薬液注入孔
7 ストレーナ
8 計測器
10 注入液流路
11 注液ノズル
12 パッカー
13 加圧送液装置
Claims (3)
- 改良しようとする砂質地盤中に互いに間隔を置いて多数の注入位置を設定し、該注入位置より砂質地盤に所定量の地盤固化用のシリカ系溶液型薬液を放射状に注入し、注入位置を中心にして砂質地盤空隙内に前記シリカ系溶液型薬液を浸透させた薬液浸透域を形成した後、その注入位置より前記砂質地盤に前記シリカ系溶液型薬液と混合され難い海水、食塩水、高濃度酸素水又は着色水からなる薬液浸透域拡張液を放射状に注入し、該注入位置を中心に前記シリカ系溶液型薬液を押し出して前記薬液浸透域を拡張させるとともに、該薬液浸透域内に薬液浸透域拡張液が砂質地盤空隙に浸透した拡張液浸透域を形成することにより、前記各薬液浸透域が互いに連続して固化してなる外殻固化体を形成し、且つ、該外殻固化体内に前記各拡張液浸透域が互いに独立して散在せしめる薬液注入工法の施工管理方法において、
前記シリカ系溶液型薬液及び前記薬液浸透域拡張液を注入する注入位置の周囲であって、前記薬液浸透域の拡張予定半径より外側に前記薬液浸透域拡張液を検知する拡張液検知手段を配置しておき、
該拡張液検知手段が前記薬液浸透域拡張液を検知した際には、前記薬液浸透域拡張液が前記薬液浸透域から漏れ出したと判断し、その判断に基づきシリカ系溶液型薬液及び薬液浸透域拡張液の注入を管理することを特徴とする薬液注入工法の施工管理方法。 - 前記砂質地盤中に互いに間隔を置いて削孔された複数の薬液注入孔にその孔軸方向に互いに間隔をおいて各注入位置を設け、前記シリカ系溶液型薬液及び前記薬液浸透域拡張液の注入作業を互いに隣り合う薬液注入孔で交互に行うようにし、且つ、一方の薬液注入孔において前記シリカ系溶液型薬液及び前記薬液浸透域拡張液の注入作業を行い、他方の薬液注入孔に前記拡張液検知手段を設けておく請求項1に記載の薬液注入工法の施工管理方法。
- 前記薬液浸透域拡張液には、海水又は食塩水を使用し、
前記拡張液検知手段は、電気伝導度又は塩分濃度を計測する計測器を備え、該計測器により計測された前記薬液浸透域拡張液注入前後の電気伝導度差又は塩分濃度差に基づき薬液浸透域拡張液を検知する請求項1又は2に記載の薬液注入工法の施工管理方法。
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JP2017155506A JP2017155506A (ja) | 2017-09-07 |
JP6771177B2 true JP6771177B2 (ja) | 2020-10-21 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6942521B2 (ja) * | 2017-05-25 | 2021-09-29 | 日本基礎技術株式会社 | 薬液注入装置及び地盤注入工法 |
JP7046448B2 (ja) * | 2018-08-30 | 2022-04-04 | 日特建設株式会社 | パッカー及び当該パッカーを用いる工法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS59122618A (ja) * | 1982-12-28 | 1984-07-16 | T S Gijutsu Kk | 地盤改良確認法 |
JP2735861B2 (ja) * | 1989-02-16 | 1998-04-02 | 株式会社青木建設 | 薬液注入工法 |
JP4555977B2 (ja) * | 2005-04-05 | 2010-10-06 | 独立行政法人港湾空港技術研究所 | 地盤改良工法 |
JP4097664B2 (ja) * | 2005-08-18 | 2008-06-11 | 強化土エンジニヤリング株式会社 | 地盤注入工法 |
CA2760841A1 (en) * | 2008-11-21 | 2010-05-27 | Brent Barron | Method and device for measuring underground pressure |
NZ721038A (en) * | 2013-12-16 | 2018-10-26 | Heisei Techno’S Co Ltd | Ground improvement method |
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