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A platform for research: civil engineering, architecture and urbanism
KNOTTED PILE AND JOINTED PILE
PROBLEM TO BE SOLVED: To provide a knotted pile and a jointed pile having higher shear capacity than shear force acting on a node portion even when short-term maximum pile peripheral surface frictional bearing capacity acts on the knotted pile.SOLUTION: A knotted pile includes a cylindrical main body portion and at least one node portion protruding from an outer peripheral surface of the main body portion. The main body portion and the node portion include concrete. When Lr is a length of a base portion of the node portion on the main body portion side in an axial direction of the main body portion, Lt is a length of a head portion of the node portion on an opposite side of the main body portion, Dp is an outer diameter of the main body portion, Lh is a protrusion height of the node portion from the main body portion in a radial direction of the main body portion, and τ is the short-term shear allowable stress of the concrete, the relationship expressed by the following two expressions: Lr>380×(Dp+2×Lh)/(τ×Dp), Lr-2×(3^0.5)×Lh≤Lt≤Lr-2/(3^0.5)×Lh is satisfied.SELECTED DRAWING: Figure 4
【課題】節杭に短期最大杭周面摩擦支持力が作用したときでも、節部に作用するせん断力よりも節部のせん断耐力が大きい節杭及び継ぎ杭を提供する。【解決手段】節杭は、円筒形状の本体部と、本体部の外周面から突出する少なくとも１つの節部とを備え、本体部及び節部はコンクリートを含み、本体部の軸線方向における、本体部側の節部の根元の長さをＬｒとし、本体部の軸線方向における、本体部とは反対側の節部の頭部の長さをＬｔとし、本体部の外径をＤｐとし、本体部の径方向における本体部からの節部の突出高さをＬｈとし、コンクリートの短期せん断許容応力度をτとしたとき、以下の２つの式：Ｌｒ＞３８０×（Ｄｐ＋２×Ｌｈ）／（τ×Ｄｐ），Ｌｒ−２×（３＾０．５）×Ｌｈ≦Ｌｔ≦Ｌｒ−２／（３＾０．５）×Ｌｈで示される関係をそれぞれ満たす。【選択図】 図４
KNOTTED PILE AND JOINTED PILE
PROBLEM TO BE SOLVED: To provide a knotted pile and a jointed pile having higher shear capacity than shear force acting on a node portion even when short-term maximum pile peripheral surface frictional bearing capacity acts on the knotted pile.SOLUTION: A knotted pile includes a cylindrical main body portion and at least one node portion protruding from an outer peripheral surface of the main body portion. The main body portion and the node portion include concrete. When Lr is a length of a base portion of the node portion on the main body portion side in an axial direction of the main body portion, Lt is a length of a head portion of the node portion on an opposite side of the main body portion, Dp is an outer diameter of the main body portion, Lh is a protrusion height of the node portion from the main body portion in a radial direction of the main body portion, and τ is the short-term shear allowable stress of the concrete, the relationship expressed by the following two expressions: Lr>380×(Dp+2×Lh)/(τ×Dp), Lr-2×(3^0.5)×Lh≤Lt≤Lr-2/(3^0.5)×Lh is satisfied.SELECTED DRAWING: Figure 4
【課題】節杭に短期最大杭周面摩擦支持力が作用したときでも、節部に作用するせん断力よりも節部のせん断耐力が大きい節杭及び継ぎ杭を提供する。【解決手段】節杭は、円筒形状の本体部と、本体部の外周面から突出する少なくとも１つの節部とを備え、本体部及び節部はコンクリートを含み、本体部の軸線方向における、本体部側の節部の根元の長さをＬｒとし、本体部の軸線方向における、本体部とは反対側の節部の頭部の長さをＬｔとし、本体部の外径をＤｐとし、本体部の径方向における本体部からの節部の突出高さをＬｈとし、コンクリートの短期せん断許容応力度をτとしたとき、以下の２つの式：Ｌｒ＞３８０×（Ｄｐ＋２×Ｌｈ）／（τ×Ｄｐ），Ｌｒ−２×（３＾０．５）×Ｌｈ≦Ｌｔ≦Ｌｒ−２／（３＾０．５）×Ｌｈで示される関係をそれぞれ満たす。【選択図】 図４
KNOTTED PILE AND JOINTED PILE
節杭及び継ぎ杭
SUGA KAZUMASA (author) / KON HIROTO (author)
2018-04-19
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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