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SPIRAL PILE
To provide a spiral pile capable of being constructed by a construction machine not adding a rotating force.SOLUTION: A spiral pile 10 comprises a spiral portion 12 and a head portion 11. The spiral portion 12 protrudes to both sides of a central axis CL along a penetration direction into the ground and includes a spiral blade 12b along the central axis CL. The head portion 11 continues to a base end side of the spiral portion 12 and receives penetration force that is an external force in the penetration direction. In the spiral portion 12, a pitch width ratio PR in which a pitch P that is a length along the central axis CL corresponding to a spiral half rotation is divided by a width W expressing an outer diameter is 2.0 to 7.0. When receiving the penetration force, the head portion 11 penetrates into the ground while rotating around the central axis CL with respect to the ground.SELECTED DRAWING: Figure 1
【課題】回転力を付与しない施工機による施工が可能な螺旋状杭を提供する。【解決手段】螺旋状杭10は、螺旋部12と、頭部11とを備える。螺旋部12は、地盤への貫入向きに沿う中心軸CLの両側へ突出するとともに中心軸CLに沿って螺旋状の羽根12bを含む。頭部11は、螺旋部12の基端側と連続し、貫入向きの外力である貫入力を受ける。螺旋部12は、螺旋の半回転に相当する中心軸CL沿いの長さであるピッチPを、外径を示す幅Wで除したピッチ幅比PRが、2.0以上、かつ、7.0以下であり、頭部11が貫入力を受けると地盤に対して中心軸CLまわりに回転しながら地盤へ貫入する。【選択図】図1
SPIRAL PILE
To provide a spiral pile capable of being constructed by a construction machine not adding a rotating force.SOLUTION: A spiral pile 10 comprises a spiral portion 12 and a head portion 11. The spiral portion 12 protrudes to both sides of a central axis CL along a penetration direction into the ground and includes a spiral blade 12b along the central axis CL. The head portion 11 continues to a base end side of the spiral portion 12 and receives penetration force that is an external force in the penetration direction. In the spiral portion 12, a pitch width ratio PR in which a pitch P that is a length along the central axis CL corresponding to a spiral half rotation is divided by a width W expressing an outer diameter is 2.0 to 7.0. When receiving the penetration force, the head portion 11 penetrates into the ground while rotating around the central axis CL with respect to the ground.SELECTED DRAWING: Figure 1
【課題】回転力を付与しない施工機による施工が可能な螺旋状杭を提供する。【解決手段】螺旋状杭10は、螺旋部12と、頭部11とを備える。螺旋部12は、地盤への貫入向きに沿う中心軸CLの両側へ突出するとともに中心軸CLに沿って螺旋状の羽根12bを含む。頭部11は、螺旋部12の基端側と連続し、貫入向きの外力である貫入力を受ける。螺旋部12は、螺旋の半回転に相当する中心軸CL沿いの長さであるピッチPを、外径を示す幅Wで除したピッチ幅比PRが、2.0以上、かつ、7.0以下であり、頭部11が貫入力を受けると地盤に対して中心軸CLまわりに回転しながら地盤へ貫入する。【選択図】図1
SPIRAL PILE
螺旋状杭
NAGATA MAKOTO (author) / TANI YOSUKE (author)
2020-12-03
Patent
Electronic Resource
Japanese
IPC:
E02D
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