JP4451698B2 - 杭頭接合構造 - Google Patents
杭頭接合構造 Download PDFInfo
- Publication number
- JP4451698B2 JP4451698B2 JP2004106400A JP2004106400A JP4451698B2 JP 4451698 B2 JP4451698 B2 JP 4451698B2 JP 2004106400 A JP2004106400 A JP 2004106400A JP 2004106400 A JP2004106400 A JP 2004106400A JP 4451698 B2 JP4451698 B2 JP 4451698B2
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- joint
- pile
- pile head
- cylinder
- reinforcing bar
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- 229910000831 Steel Inorganic materials 0.000 description 1
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Description
即ち、接合部8は場所打ちコンクリート杭1と同軸で場所打ちコンクリート杭1の杭径より小さい径の柱状に形成され、接合部8の下面7は杭頭部3の上面4の面積より小さく、接合部8の上面6の面積より大きいフーチング2からの荷重が接合部8を介して接合部8の真下に位置する杭頭部3の上面4側の軸中央側に集中するという構成となっている。このため、杭頭部3の上面4側の軸中央側に加わる応力により、杭頭部3の上面4側において杭頭部3の軸中央側から周面9の方向への力(引張力)が発生する。しかし、杭頭部補強筒体11により、杭頭部3の上面4側の周面9のみが拘束されて、上記力(引張力)に抵抗することができて、杭頭部の周方向への広がり変形が防止される。即ち、杭頭部3の上面4側の軸中央側において、接合部8からの応力に対する強度(コンクリート支圧強度)を大きくできるため、杭頭部3の上面4側の損傷を防止できる。接合部8には接合部8の周面12を取り囲むように当該周面12に内周面13が接着剤等の取付手段で取付けられた接合部補強筒体14を備える。この接合部補強筒体14により、接合部8の周面12を拘束できることから、接合部8の靭性を確保できて、接合部8の強度を上げることができる。従って、地震時において、接合部8の破壊を防止できる。
3 杭頭部3 杭頭部の上面、5 フーチングの下面、6 接合部の上面、
7 接合部の下面、8 接合部、12 接合部の周面、
14(14a;14b) 接合部補強筒体、14t 接合部補強筒体の上端、
15 接合部補強筒体の下端、16 緩衝体、H 隙間。
Claims (1)
- 杭の杭頭部の上面と構造物の基礎部の下面とが接合部により互いに接合され、接合部が杭と同軸で杭の杭径より小さい径の柱状に形成され、かつ、接合部には接合部の周面を取り囲むように取付けられた接合部補強筒体を備えた杭頭接合構造において、
杭は、地中に設けた孔内に組付けられた主筋と帯筋とにより形成された補強用鉄筋構成体と、補強用鉄筋構成体が設置された孔内に打設されたコンクリートとにより形成され、
補強用鉄筋構成体は、主筋と帯筋とが組付けられて形成されるとともに杭と同軸に配置されて杭頭部の上面より突出するように設けられる連結用鉄筋構成体と連結され、
杭頭部の上面には、緩衝体により形成された型枠が連結用鉄筋構成体の周りを囲むように配置され、
型枠が杭と同軸に位置された筒孔を備え、筒孔の上部の径が接合部補強筒体の外周径と同じに形成され、筒孔の下部の径が接合部補強筒体の内周径と同じに形成され、接合部補強筒体が筒孔の上部に設置されることで、接合部補強筒体の下端と杭頭部の上面との間に型枠が介在され、
接合部は、上記連結用鉄筋構成体と、上記型枠及び接合部補強筒体の内側に打設され、上記補強用鉄筋構成体が設置された孔内に打設されたコンクリートにより形成された杭の杭頭部の上面に打ち継がれたコンクリートとにより形成され、
接合部補強筒体が繊維シートにより形成されたことを特徴とする杭頭接合構造。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004106400A JP4451698B2 (ja) | 2004-03-31 | 2004-03-31 | 杭頭接合構造 |
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JP2004106400A JP4451698B2 (ja) | 2004-03-31 | 2004-03-31 | 杭頭接合構造 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005290801A JP2005290801A (ja) | 2005-10-20 |
JP4451698B2 true JP4451698B2 (ja) | 2010-04-14 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2004106400A Expired - Lifetime JP4451698B2 (ja) | 2004-03-31 | 2004-03-31 | 杭頭接合構造 |
Country Status (1)
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JP (1) | JP4451698B2 (ja) |
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2004
- 2004-03-31 JP JP2004106400A patent/JP4451698B2/ja not_active Expired - Lifetime
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JP2005290801A (ja) | 2005-10-20 |
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