JP2011006946A - 地盤改良工法 - Google Patents
地盤改良工法 Download PDFInfo
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Abstract
【解決手段】砂杭等を地盤内に造成する地盤改良工法において、周辺地盤に鉄筋や鋼管や形鋼等の棒状の鋼材を挿入してから、砂杭を地盤に貫入して造成することにより増加する側方圧力が鋼材を拘束することで、鋼材の引き抜き抵抗が増加し、隆起しようとする周辺地盤に対して鋼材の引き抜き方向と反対方向に軸力が発生することにより地盤の隆起を効果的に抑制する。
【選択図】図1
Description
ただし、σs:鋼材周りの土と鋼材との付着応力
As:鋼材の付着面積(鋼材長×鋼材周長)
単管 周長:15.268cm
地盤強度 せん断抵抗角φ:40°
土の単位体積重量:1.8tf/m3
土の付着力=土被り圧(土の単位体積重量×平均深度)
=1.8tf/m3×2m=3.6tf/m2
側圧係数k=2.0 (サンドコンパクション施工時)
引き抜き力=3.6tf/m2・2.0・tan(40)×0.15268m×4m=3.7tf/本
31 鋼材
G 地表面
Claims (4)
- 杭を地盤内に造成する地盤改良工法において、
杭の造成前に杭のまわりに棒状体を地中に差し込んだ後に杭を造成することを特徴とする地盤改良工法。 - 複数の杭を地盤内に造成する前に前記杭の周囲に複数の棒状体を差し込み、
前記杭の造成による前記杭間における側方圧力の増加が前記棒状体の側面の摩擦抵抗を大きくする請求項1に記載の地盤改良工法。 - 前記杭が砂杭である請求項1または2に記載の地盤改良工法。
- 前記杭が前記地盤内に強制圧入される撹拌杭である請求項1または2に記載の地盤改良工法。
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JP2009152321A JP4842350B2 (ja) | 2009-06-26 | 2009-06-26 | 地盤改良工法 |
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JP2009152321A JP4842350B2 (ja) | 2009-06-26 | 2009-06-26 | 地盤改良工法 |
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JP2011006946A true JP2011006946A (ja) | 2011-01-13 |
JP4842350B2 JP4842350B2 (ja) | 2011-12-21 |
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JP2009152321A Active JP4842350B2 (ja) | 2009-06-26 | 2009-06-26 | 地盤改良工法 |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012180705A (ja) * | 2011-03-02 | 2012-09-20 | Penta Ocean Construction Co Ltd | 地盤改良工法および棒状体アッセンブリ |
JP2012180706A (ja) * | 2011-03-02 | 2012-09-20 | Penta Ocean Construction Co Ltd | 地盤改良工法および棒状体アッセンブリ |
CN105133598A (zh) * | 2015-08-26 | 2015-12-09 | 水利部交通运输部国家能源局南京水利科学研究院 | 采用土工合成材料加筋的水泥搅拌桩结构及其施工方法 |
CN105780753A (zh) * | 2016-03-28 | 2016-07-20 | 北京中岩大地科技股份有限公司 | 固化土桩的施工方法 |
JP2019019490A (ja) * | 2017-07-13 | 2019-02-07 | 株式会社不動テトラ | 砂質地盤締固め工法 |
JP2019127746A (ja) * | 2018-01-24 | 2019-08-01 | 株式会社竹中工務店 | 浮上り抑制構造、及び逆打ち工法 |
JP2019127745A (ja) * | 2018-01-24 | 2019-08-01 | 株式会社竹中工務店 | 浮上り抑制構造、及び逆打ち工法 |
CN110106759A (zh) * | 2019-05-24 | 2019-08-09 | 东北大学 | 一种沿海公路路基抗浮桩系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08134894A (ja) * | 1994-11-14 | 1996-05-28 | Nakatomi Kurimoto | 軟弱地盤の改良工法 |
JP2000345554A (ja) * | 1999-06-08 | 2000-12-12 | Fudo Constr Co Ltd | 地盤改良方法 |
JP2002173931A (ja) * | 2000-12-05 | 2002-06-21 | Sanei Engineering Kk | 地盤改良工法 |
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2009
- 2009-06-26 JP JP2009152321A patent/JP4842350B2/ja active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08134894A (ja) * | 1994-11-14 | 1996-05-28 | Nakatomi Kurimoto | 軟弱地盤の改良工法 |
JP2000345554A (ja) * | 1999-06-08 | 2000-12-12 | Fudo Constr Co Ltd | 地盤改良方法 |
JP2002173931A (ja) * | 2000-12-05 | 2002-06-21 | Sanei Engineering Kk | 地盤改良工法 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012180705A (ja) * | 2011-03-02 | 2012-09-20 | Penta Ocean Construction Co Ltd | 地盤改良工法および棒状体アッセンブリ |
JP2012180706A (ja) * | 2011-03-02 | 2012-09-20 | Penta Ocean Construction Co Ltd | 地盤改良工法および棒状体アッセンブリ |
CN105133598A (zh) * | 2015-08-26 | 2015-12-09 | 水利部交通运输部国家能源局南京水利科学研究院 | 采用土工合成材料加筋的水泥搅拌桩结构及其施工方法 |
CN105780753A (zh) * | 2016-03-28 | 2016-07-20 | 北京中岩大地科技股份有限公司 | 固化土桩的施工方法 |
JP2019019490A (ja) * | 2017-07-13 | 2019-02-07 | 株式会社不動テトラ | 砂質地盤締固め工法 |
JP2019127746A (ja) * | 2018-01-24 | 2019-08-01 | 株式会社竹中工務店 | 浮上り抑制構造、及び逆打ち工法 |
JP2019127745A (ja) * | 2018-01-24 | 2019-08-01 | 株式会社竹中工務店 | 浮上り抑制構造、及び逆打ち工法 |
JP7184244B2 (ja) | 2018-01-24 | 2022-12-06 | 株式会社竹中工務店 | 浮上り抑制構造、及び逆打ち工法 |
CN110106759A (zh) * | 2019-05-24 | 2019-08-09 | 东北大学 | 一种沿海公路路基抗浮桩系统 |
CN110106759B (zh) * | 2019-05-24 | 2020-07-17 | 东北大学 | 一种沿海公路路基抗浮桩系统 |
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