JP4707001B2 - 透水層混在軟弱地盤の真空圧密改良工法 - Google Patents
透水層混在軟弱地盤の真空圧密改良工法 Download PDFInfo
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- JP4707001B2 JP4707001B2 JP2005321518A JP2005321518A JP4707001B2 JP 4707001 B2 JP4707001 B2 JP 4707001B2 JP 2005321518 A JP2005321518 A JP 2005321518A JP 2005321518 A JP2005321518 A JP 2005321518A JP 4707001 B2 JP4707001 B2 JP 4707001B2
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Images
Description
2 透水層
3 複合挿入材
4 ドレーン材
4a 芯材
4b 透水性被覆材
5 透水層用通水パイプ
6 減圧手段連通用通水パイプ
7 減圧手段
8 集水管
10 キャップ
11 本体部
12 パイプジョイント部
15 耐引張力補強材
16 巻き締め具
20 台車
21 ガイド用支柱
22 マンドレル
23 アンカー
Claims (3)
- 深さ方向の中間高さ位置に1又は複数の透水層があり、該透水層の上下に軟弱粘土層がある透水層混在軟弱地盤の真空圧密改良に際し、
前記透水層を上下に貫通し、該透水層内の水を吸引しない長さの透水層用通水パイプの両端を、前記透水層の上下の軟弱粘土層内の水を吸引するための透水性を有する各ドレーン材の端部に嵌め付けた不透水性のキャップの端部に該キャップ内と連通させて透水層用通水パイプを連結させることによって互いに連通させて連結するとともに、前記透水層用通水パイプの両端にそれぞれ連結されたキャップ間に、該キャップ間の間隔の伸長を防止する耐引張力補強材を介在させた複合挿入材を使用し、
該複合挿入材を、前記軟弱粘土層と透水層の上下方向の分布に対応した長さに形成して施工現場に搬入し、
該複合挿入材を、その透水層用通水パイプが前記透水層を上下に貫通する深さに挿入して前記ドレーン材内を減圧手段に連通させ、該ドレーン材の内部を減圧することを特徴としてなる透水層混在軟弱地盤の真空圧密改良工法。 - 前記耐引張力補強材は帯状をした繊維補強合成樹脂性テープである請求項1に記載の透水層混在軟弱地盤の真空圧密改良工法。
- 前記複合挿入材には、その最上部のドレーン材の上端に減圧手段連通用通水パイプを連通させて備え、該減圧手段連通用通水パイプを別の複合挿入材の最下部のドレーン材下端に連結することによって多数の複合挿入材を1本の状態に連結して施工現場に搬入し、ドレーン材打設装置により、順次繰り出して各複合挿入材を透水層混在軟弱地盤に挿入する請求項1又は2に記載の透水層混在軟弱地盤の真空圧密改良工法。
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JP2005321518A JP4707001B2 (ja) | 2005-11-04 | 2005-11-04 | 透水層混在軟弱地盤の真空圧密改良工法 |
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JP4707001B2 true JP4707001B2 (ja) | 2011-06-22 |
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Cited By (1)
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CN104532824A (zh) * | 2014-12-23 | 2015-04-22 | 浙江省水利水电勘测设计院 | 一种真空预压处理软土地基的水平排水系统 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102733371B (zh) * | 2012-07-18 | 2015-06-24 | 温州大学 | 一种密闭直抽分段式真空预压地基处理方法 |
JP6206920B2 (ja) * | 2014-01-20 | 2017-10-04 | 株式会社不動テトラ | 地盤注入ボード及びそれを用いた地盤注入工法 |
JP6249560B2 (ja) * | 2014-01-30 | 2017-12-20 | 五洋建設株式会社 | 地盤改良工法およびドレーン材 |
JP6453719B2 (ja) * | 2015-06-16 | 2019-01-16 | 五洋建設株式会社 | 真空圧密工法およびドレーン材 |
CN110241801A (zh) * | 2019-05-10 | 2019-09-17 | 浙江工业大学 | 一种真空预压密封膜下土体真空度监测方法及装置 |
CN116025358B (zh) * | 2023-02-24 | 2023-06-27 | 中国煤炭地质总局勘查研究总院 | 一种露天采坑地下含水层的修复方法 |
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JP2002138457A (ja) * | 2000-11-02 | 2002-05-14 | Penta Ocean Constr Co Ltd | 中間深さ位置に砂層を有する軟弱地盤の真空圧密による地盤改良工法 |
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JP2002138457A (ja) * | 2000-11-02 | 2002-05-14 | Penta Ocean Constr Co Ltd | 中間深さ位置に砂層を有する軟弱地盤の真空圧密による地盤改良工法 |
Cited By (1)
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CN104532824A (zh) * | 2014-12-23 | 2015-04-22 | 浙江省水利水电勘测设计院 | 一种真空预压处理软土地基的水平排水系统 |
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