A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To more efficiently and effectively improve the bearing strength of a cast-in-place concrete pile and reduce the construction cost and construction time compared to the conventional art.SOLUTION: A cast-in-place concrete pile includes a cylindrical shank 10, and a bottom-enlarged part obtained by enlarging a tip of the shank 10 using an excavator 3 for bottom enlargement, in which the bottom-enlarged part has an upper-stage bottom-enlarged part 21, and at least one lower-stage bottom-enlarged part in a vertical bottom-enlarged part 22 extending lower than the upper-stage bottom-enlarged part 21, the upper-stage bottom-enlarged part 21 is constructed so as to have a circular part around a central axis of the shank 10 in plane cross-sectional view, the lower-stage bottom-enlarged part is constructed so as to have a projecting circular arc part projecting to the outside in a radial direction from a circular outer surface around the central axis of the shank 10 in the plane cross-sectional view, the projecting circular arc part of the lower-stage bottom-enlarged part 22 is positioned outside in the radial direction of the circular part of the upper-stage bottom-enlarged part 21, and an excavation length in the vertical direction of the vertical bottom-enlarged part 22 is equal to or higher than the total height of the excavator 3 for bottom enlargement.SELECTED DRAWING: Figure 5
【課題】従来と比較し、より効率的且つ効果的に支持耐力を向上させることができ、施工費と施工時間の低減を図ることを可能とした。【解決手段】円柱状の軸部１０と、拡底用掘削機３を使用して軸部１０の先端部を拡張してなる拡底部を備え、拡底部は、上段拡底部２１と、上段拡底部２１より下方に延びる鉛直拡底部２２において少なくとも１つの下段拡底部と、を有し、上段拡底部２１は、平断面視で軸部１０の中心軸を中心とした円形部を備えた形で構築され、下段拡底部は、平断面視で軸部１０の中心軸を中心とした円形外面から径方向外側に突出する凸円弧部を備えた形で構築され、下段拡底部２２の凸円弧部は、上段拡底部２１の円形部よりも径方向の外側に位置し、鉛直拡底部２２の上下方向の掘削長さが拡底用掘削機３の全高以上であることを特徴とする場所打ちコンクリート杭を提供する。【選択図】図５
To more efficiently and effectively improve the bearing strength of a cast-in-place concrete pile and reduce the construction cost and construction time compared to the conventional art.SOLUTION: A cast-in-place concrete pile includes a cylindrical shank 10, and a bottom-enlarged part obtained by enlarging a tip of the shank 10 using an excavator 3 for bottom enlargement, in which the bottom-enlarged part has an upper-stage bottom-enlarged part 21, and at least one lower-stage bottom-enlarged part in a vertical bottom-enlarged part 22 extending lower than the upper-stage bottom-enlarged part 21, the upper-stage bottom-enlarged part 21 is constructed so as to have a circular part around a central axis of the shank 10 in plane cross-sectional view, the lower-stage bottom-enlarged part is constructed so as to have a projecting circular arc part projecting to the outside in a radial direction from a circular outer surface around the central axis of the shank 10 in the plane cross-sectional view, the projecting circular arc part of the lower-stage bottom-enlarged part 22 is positioned outside in the radial direction of the circular part of the upper-stage bottom-enlarged part 21, and an excavation length in the vertical direction of the vertical bottom-enlarged part 22 is equal to or higher than the total height of the excavator 3 for bottom enlargement.SELECTED DRAWING: Figure 5
【課題】従来と比較し、より効率的且つ効果的に支持耐力を向上させることができ、施工費と施工時間の低減を図ることを可能とした。【解決手段】円柱状の軸部１０と、拡底用掘削機３を使用して軸部１０の先端部を拡張してなる拡底部を備え、拡底部は、上段拡底部２１と、上段拡底部２１より下方に延びる鉛直拡底部２２において少なくとも１つの下段拡底部と、を有し、上段拡底部２１は、平断面視で軸部１０の中心軸を中心とした円形部を備えた形で構築され、下段拡底部は、平断面視で軸部１０の中心軸を中心とした円形外面から径方向外側に突出する凸円弧部を備えた形で構築され、下段拡底部２２の凸円弧部は、上段拡底部２１の円形部よりも径方向の外側に位置し、鉛直拡底部２２の上下方向の掘削長さが拡底用掘削機３の全高以上であることを特徴とする場所打ちコンクリート杭を提供する。【選択図】図５
CAST-IN-PLACE CONCRETE PILE
場所打ちコンクリート杭
MANO HIDEYUKI (author)
2022-04-14
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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