JP2017145619A - 異径鋼管杭 - Google Patents
異径鋼管杭 Download PDFInfo
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- JP2017145619A JP2017145619A JP2016028184A JP2016028184A JP2017145619A JP 2017145619 A JP2017145619 A JP 2017145619A JP 2016028184 A JP2016028184 A JP 2016028184A JP 2016028184 A JP2016028184 A JP 2016028184A JP 2017145619 A JP2017145619 A JP 2017145619A
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- diameter
- pile
- steel pipe
- pipe pile
- diameter portion
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Abstract
Description
縮径率=(D―d)/2L ・・・(1)
D:大径部の外径(mm)
d:小径部の外径(mm)
L:テーパ部の長さ(mm)
縮径率=(D―d)/2L ・・・(1)
D:大径部の外径(mm)
d:小径部の外径(mm)
L:テーパ部の長さ(mm)
kh0=E0/0.3=2800N/0.3:水平方向地盤反力係数(kN/m3)
N:地盤N値、表層では1〜10程度と仮定
D:杭径(mm)
EI:杭の曲げ剛性(kN・m2)
N:地盤N値、表層では5と仮定
D:杭径(mm)
EI:杭の曲げ剛性(kN・m2)
とし、板厚や杭径が異なる8通りについて設計した結果を図9に示す。いずれの規模の杭でも、本発明例の方が、従来例よりも1割程度鋼材重量が小さくなっていることがわかる。
11 大径部
12 テーパ部
13 小径部
Claims (3)
- 上端側の大径部と、下端側の小径部と、前記大径部から前記小径部に向けて縮径するテーパ部とを有する異径鋼管杭であって、
前記テーパ部は、板厚が一定であり、式(1)で求められる縮径率が1.5/100〜10/100であることを特徴とする、異径鋼管杭。
縮径率=(D―d)/2L ・・・(1)
D:大径部の外径(mm)
d:小径部の外径(mm)
L:テーパ部の長さ(mm) - 前記大径部の板厚が、前記小径部の板厚よりも大きいことを特徴とする、請求項1に記載の異径鋼管杭。
- 前記テーパ部が、前記大径部の外径Dに対して杭頭から2D〜8Dの高さに配置されていることを特徴とする、請求項1または2のいずれか一項に記載の異径鋼管杭。
Priority Applications (1)
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JP2016028184A JP6589677B2 (ja) | 2016-02-17 | 2016-02-17 | 異径鋼管杭 |
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JP2016028184A JP6589677B2 (ja) | 2016-02-17 | 2016-02-17 | 異径鋼管杭 |
Publications (2)
Publication Number | Publication Date |
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JP2017145619A true JP2017145619A (ja) | 2017-08-24 |
JP6589677B2 JP6589677B2 (ja) | 2019-10-16 |
Family
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Family Applications (1)
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JP2016028184A Active JP6589677B2 (ja) | 2016-02-17 | 2016-02-17 | 異径鋼管杭 |
Country Status (1)
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JP (1) | JP6589677B2 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7449017B1 (ja) | 2023-08-29 | 2024-03-13 | ヨシモトポール株式会社 | 鋼管杭 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001295291A (ja) * | 2000-04-10 | 2001-10-26 | Nkk Corp | 柱と杭の接合方法 |
JP2001348867A (ja) * | 2001-04-13 | 2001-12-21 | Nkk Corp | ねじ込み式鋼管杭及びその施工方法 |
US20020048493A1 (en) * | 1998-05-27 | 2002-04-25 | Stanley Merjan | Composite pile with tapering lower portion and method for driving pile into granular soil |
JP2005188865A (ja) * | 2003-12-26 | 2005-07-14 | Jfe Steel Kk | 地熱利用鋼管杭 |
JP2007327280A (ja) * | 2006-06-08 | 2007-12-20 | Sumitomo Forestry Co Ltd | 鋼管杭の施工方法 |
JP2008025156A (ja) * | 2006-07-19 | 2008-02-07 | Asahi Kasei Construction Materials Co Ltd | 異径鋼管杭 |
KR20090050562A (ko) * | 2007-11-16 | 2009-05-20 | 백규호 | 테이퍼형 강관을 이용한 긴 말뚝 시공법 |
JP2013163890A (ja) * | 2012-02-09 | 2013-08-22 | Nippon Steel & Sumitomo Metal | 住宅用基礎杭の連結方法 |
-
2016
- 2016-02-17 JP JP2016028184A patent/JP6589677B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020048493A1 (en) * | 1998-05-27 | 2002-04-25 | Stanley Merjan | Composite pile with tapering lower portion and method for driving pile into granular soil |
JP2001295291A (ja) * | 2000-04-10 | 2001-10-26 | Nkk Corp | 柱と杭の接合方法 |
JP2001348867A (ja) * | 2001-04-13 | 2001-12-21 | Nkk Corp | ねじ込み式鋼管杭及びその施工方法 |
JP2005188865A (ja) * | 2003-12-26 | 2005-07-14 | Jfe Steel Kk | 地熱利用鋼管杭 |
JP2007327280A (ja) * | 2006-06-08 | 2007-12-20 | Sumitomo Forestry Co Ltd | 鋼管杭の施工方法 |
JP2008025156A (ja) * | 2006-07-19 | 2008-02-07 | Asahi Kasei Construction Materials Co Ltd | 異径鋼管杭 |
KR20090050562A (ko) * | 2007-11-16 | 2009-05-20 | 백규호 | 테이퍼형 강관을 이용한 긴 말뚝 시공법 |
JP2013163890A (ja) * | 2012-02-09 | 2013-08-22 | Nippon Steel & Sumitomo Metal | 住宅用基礎杭の連結方法 |
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