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A platform for research: civil engineering, architecture and urbanism
ROTARY PENETRATION STEEL PIPE PILE AND CONSTRUCTION METHOD FOR ROTARY PENETRATION STEEL PIPE PILE
To provide a rotary penetration steel pipe pile driven so as to be arranged in an intermediate layer without allowing the tip of the pile to reach the bearing layer, and capable of sufficiently exhibiting bearing capacity and reducing costs, and a construction method for the rotary penetration steel pipe pile.SOLUTION: A rotary penetration steel pipe pile 1 according to the present invention is driven so that the tip of the pile is placed in an intermediate layer without reaching the bearing layer, and comprises a lowermost blade 3 with a substantially helical single turn provided near the tip of the pile, and single-turn upper blades 5 provided in multiple stages above the lowermost blade 3 and at regular intervals within the range of 1.25 to 7.5 times the blade diameter. The outer diameter of the lowermost blade 3 is set to be larger than the outer diameter of the upper blade 5 and 1.5 to 3 times the pile diameter. The outer diameter of the upper blade 5 is smaller than the outer diameter of the lowermost blade 3 and 1.6 times or less than the pile diameter, and the pitch thereof is set to be the same as the pitch of the lowermost blade 3.SELECTED DRAWING: Figure 1
【課題】杭先端を支持層に到達させることなく中間層に配置されるように打設される回転貫入鋼管杭であって、支持力を十分に発揮できると共にコスト低減ができる回転貫入鋼管杭、該回転貫入鋼管杭の施工方法を提供する。【解決手段】本発明に係る回転貫入鋼管杭１は、杭先端を支持層に到達させることなく中間層に配置されるように打設されるものであって、杭先端近傍に設けられた略らせん状の一巻きの最下段翼３と、最下段翼３の上方に複数段で、かつ翼径の1.25～7.5倍の範囲内の一定間隔で設けられた一巻きの上段翼５とを有し、最下段翼３の外径は、上段翼５の外径より大きく、かつ杭径の1.5～3倍に設定され、上段翼５の外径は、最下段翼３の外径より小さく、かつ杭径の1.6倍以下であり、そのピッチが最下段翼３のピッチと同一に設定されている。【選択図】 図１
ROTARY PENETRATION STEEL PIPE PILE AND CONSTRUCTION METHOD FOR ROTARY PENETRATION STEEL PIPE PILE
To provide a rotary penetration steel pipe pile driven so as to be arranged in an intermediate layer without allowing the tip of the pile to reach the bearing layer, and capable of sufficiently exhibiting bearing capacity and reducing costs, and a construction method for the rotary penetration steel pipe pile.SOLUTION: A rotary penetration steel pipe pile 1 according to the present invention is driven so that the tip of the pile is placed in an intermediate layer without reaching the bearing layer, and comprises a lowermost blade 3 with a substantially helical single turn provided near the tip of the pile, and single-turn upper blades 5 provided in multiple stages above the lowermost blade 3 and at regular intervals within the range of 1.25 to 7.5 times the blade diameter. The outer diameter of the lowermost blade 3 is set to be larger than the outer diameter of the upper blade 5 and 1.5 to 3 times the pile diameter. The outer diameter of the upper blade 5 is smaller than the outer diameter of the lowermost blade 3 and 1.6 times or less than the pile diameter, and the pitch thereof is set to be the same as the pitch of the lowermost blade 3.SELECTED DRAWING: Figure 1
【課題】杭先端を支持層に到達させることなく中間層に配置されるように打設される回転貫入鋼管杭であって、支持力を十分に発揮できると共にコスト低減ができる回転貫入鋼管杭、該回転貫入鋼管杭の施工方法を提供する。【解決手段】本発明に係る回転貫入鋼管杭１は、杭先端を支持層に到達させることなく中間層に配置されるように打設されるものであって、杭先端近傍に設けられた略らせん状の一巻きの最下段翼３と、最下段翼３の上方に複数段で、かつ翼径の1.25～7.5倍の範囲内の一定間隔で設けられた一巻きの上段翼５とを有し、最下段翼３の外径は、上段翼５の外径より大きく、かつ杭径の1.5～3倍に設定され、上段翼５の外径は、最下段翼３の外径より小さく、かつ杭径の1.6倍以下であり、そのピッチが最下段翼３のピッチと同一に設定されている。【選択図】 図１
ROTARY PENETRATION STEEL PIPE PILE AND CONSTRUCTION METHOD FOR ROTARY PENETRATION STEEL PIPE PILE
回転貫入鋼管杭、該回転貫入鋼管杭の施工方法
KAWAI MARINA (author) / SHINOHARA TOSHIO (author) / FUKAYA TOSHIYUKI (author)
2023-02-16
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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