JP2012107502A - 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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Abstract
【解決方法】 地盤中に存在する微生物の代謝に必要な養分を地盤中に供給して該微生物の代謝を促進し、該微生物の代謝産物によって前記地盤の液状化抵抗を高める。前記養分を微生物と共に地盤中に供給してもよい。発明において使用される微生物は代謝反応により異なるが、主として地盤の水飽和度の低下(微生物による窒素および炭酸ガスの生成)および粘性の増加(バイオポリマー生成)によって液状化抵抗を高める。
【選択図】 図1
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、前記微生物は前記地盤の水飽和度を低下させることを特徴とする地盤改良工法。
- 前記養分は硝酸イオンあるいは最終的に硝酸性イオンとなる窒素化合物であることを特徴とする請求項1に記載の地盤改良工法。
- 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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JP2012022144A JP5148764B2 (ja) | 2012-02-03 | 2012-02-03 | 微生物を用いた地盤改良工法 |
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JP5148764B2 JP5148764B2 (ja) | 2013-02-20 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105507232A (zh) * | 2015-12-08 | 2016-04-20 | 南京林业大学 | 一种用于加固可液化地基的微生物平板注浆装置及方法 |
JP2016069885A (ja) * | 2014-09-29 | 2016-05-09 | 中込 雄大 | 地中熱利用機構兼用地盤不飽和化機構 |
CN107724375A (zh) * | 2017-11-07 | 2018-02-23 | 温州大学 | 真空排水袋装砂井联合砂井生物固结的吹填土地基处理方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109518678A (zh) * | 2018-11-02 | 2019-03-26 | 东南大学 | 一种植物粘液-微生物联合加固土体的方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0343515A (ja) * | 1989-07-10 | 1991-02-25 | Shimizu Corp | 地盤改良工法 |
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 |
JP2001200525A (ja) * | 2000-01-19 | 2001-07-27 | Sakamoto Seiichi | 微生物による構造物材料の物性改良方法 |
JP2003170189A (ja) * | 2001-12-11 | 2003-06-17 | National Agricultural Research Organization | 処理装置 |
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2012
- 2012-02-03 JP JP2012022144A patent/JP5148764B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0343515A (ja) * | 1989-07-10 | 1991-02-25 | Shimizu Corp | 地盤改良工法 |
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 |
JP2001200525A (ja) * | 2000-01-19 | 2001-07-27 | Sakamoto Seiichi | 微生物による構造物材料の物性改良方法 |
JP2003170189A (ja) * | 2001-12-11 | 2003-06-17 | National Agricultural Research Organization | 処理装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016069885A (ja) * | 2014-09-29 | 2016-05-09 | 中込 雄大 | 地中熱利用機構兼用地盤不飽和化機構 |
CN105507232A (zh) * | 2015-12-08 | 2016-04-20 | 南京林业大学 | 一种用于加固可液化地基的微生物平板注浆装置及方法 |
CN105507232B (zh) * | 2015-12-08 | 2017-06-16 | 南京林业大学 | 一种用于加固可液化地基的微生物平板注浆装置及方法 |
CN107724375A (zh) * | 2017-11-07 | 2018-02-23 | 温州大学 | 真空排水袋装砂井联合砂井生物固结的吹填土地基处理方法 |
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