JP5022293B2 - 微生物を用いた地盤改良工法 - Google Patents
微生物を用いた地盤改良工法 Download PDFInfo
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- JP5022293B2 JP5022293B2 JP2008113084A JP2008113084A JP5022293B2 JP 5022293 B2 JP5022293 B2 JP 5022293B2 JP 2008113084 A JP2008113084 A JP 2008113084A JP 2008113084 A JP2008113084 A JP 2008113084A JP 5022293 B2 JP5022293 B2 JP 5022293B2
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Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Foundations (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Description
吉見吉昭著「砂地盤の液状化 第2版」技法堂1991年
図1において、液状化抵抗力を高める対象である飽和地盤100の地上には建築物500が建設されている。建築物の周囲に、第1の井戸200を掘削し、硝酸塩・有機物貯留タンク400に貯蔵された硝酸塩および/または有機物を混入させた水溶液を注水ポンプ300によって第1の井戸200に注入する。一方、建物周囲の別の場所(例えば第1の井戸200とは対角線上の位置)に第2の井戸220を掘削して、揚水ポンプ320によって地下水をくみ出す。くみ出した地下水は、注水ポンプ300に戻して循環させてもよい。
200、220 第1の井戸、第2の井戸
300、320 注水ポンプ、揚水ポンプ
400 硝酸塩・有機物貯留タンク
420 コンプレッサ
500 建築物
Claims (3)
- 地盤中に存在する微生物の代謝および/または増殖に必要な養分を地盤中に供給して該微生物の代謝および/または増殖を促進し、該微生物の代謝産物および/または増殖した菌体集合体によって前記地盤の液状化抵抗を高める地盤改良工法であって、
前記養分は硝酸イオンを含み、前記代謝産物は窒素ガスであり、飽和間隙水中に滞留した窒素ガスにより地盤の水飽和度を低減することにより液状化抵抗を高めることを特徴とする、地盤改良工法。 - 地盤中に存在する微生物の代謝および/または増殖に必要な養分を地盤中に供給して該微生物の代謝および/または増殖を促進し、該微生物の代謝産物および/または増殖した菌体集合体によって前記地盤の液状化抵抗を高める地盤改良工法であって、
前記養分は酸素を含み、前記代謝産物は二酸化炭素ガスであり、飽和間隙水中に滞留した二酸化炭素ガスにより地盤の水飽和度を低減すること、および飽和間隙水中に形成されたバイオフィルムにより間隙水の粘性を増大させることを特徴とする、地盤改良工法。 - 前記必要な養分の地盤中への供給は、液状化防止対象地盤および/または周辺近傍に設けた井戸、またはそれと同等の機能を持つ養分の供給施設によっておこなう請求項1または2に記載の地盤改良工法。
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JP2008113084A JP5022293B2 (ja) | 2008-04-23 | 2008-04-23 | 微生物を用いた地盤改良工法 |
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JP2012022144A Division JP5148764B2 (ja) | 2012-02-03 | 2012-02-03 | 微生物を用いた地盤改良工法 |
JP2012022145A Division JP5252754B2 (ja) | 2012-02-03 | 2012-02-03 | 微生物を用いた地盤改良工法 |
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JP2009263934A JP2009263934A (ja) | 2009-11-12 |
JP5022293B2 true JP5022293B2 (ja) | 2012-09-12 |
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Cited By (1)
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CN108894208A (zh) * | 2018-05-14 | 2018-11-27 | 昆明理工大学 | 一种针对低分解度泥炭土地基的微生物处理方法 |
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JP6263753B2 (ja) * | 2014-01-30 | 2018-01-24 | 大成建設株式会社 | セルロース合成機能を有するEnterobactersp.検出用プライマーセット及びEnterobacterspの検出方法 |
CN114687343B (zh) * | 2022-03-07 | 2022-12-23 | 河海大学 | 一种微生物减饱和预制桩基及施工方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2601697B2 (ja) * | 1988-08-30 | 1997-04-16 | 清水建設株式会社 | 微生物を用いた地盤改良方法 |
JP2733540B2 (ja) * | 1989-07-10 | 1998-03-30 | 清水建設株式会社 | 地盤改良工法 |
JP3472356B2 (ja) * | 1994-09-29 | 2003-12-02 | 前田建設工業株式会社 | 既設構造物周辺地盤の液状化対策改良工法 |
JPH1161118A (ja) * | 1997-08-15 | 1999-03-05 | Nippon Chem Ind Co Ltd | 酸性雨による土壌の酸性化防止剤 |
JP4599611B2 (ja) * | 2004-11-17 | 2010-12-15 | 国立大学法人北海道大学 | 地盤改良工法およびその工法に用いるグラウト |
JP2007136452A (ja) * | 2005-10-21 | 2007-06-07 | Jfe Steel Kk | スラグ材及びその製造方法並びにそのスラグ材を利用した環境改善材料、環境改善方法及び土木建築材料 |
JP4621634B2 (ja) * | 2006-06-29 | 2011-01-26 | 国立大学法人北海道大学 | 微生物を用いたカルシウムを含む地盤の固結方法 |
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Cited By (2)
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CN108894208A (zh) * | 2018-05-14 | 2018-11-27 | 昆明理工大学 | 一种针对低分解度泥炭土地基的微生物处理方法 |
CN108894208B (zh) * | 2018-05-14 | 2020-11-17 | 昆明理工大学 | 一种针对低分解度泥炭土地基的微生物处理方法 |
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