A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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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