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HIGH FLEXURAL TOUGHNESS PC PILE
PROBLEM TO BE SOLVED: To provide a high flexural toughness PC pile capable of relieving a local elongation of a vertical reinforcement, and excellent in high flexural toughness.SOLUTION: In a high flexural toughness PC pile 1, a plurality of vertical reinforcements 3, 3,... composed of a PC steel material of 2% or more in a uniform elongation, are buried in a concrete body 2, and an annular or spiral horizontal restraining reinforcement 4 is placed on the outside of the vertical reinforcements 3, 3,..., and the vertical reinforcements 3, 3,... are stuck to the concrete body 2 in sticking strength equal to or less than tensile stress intensity of generating a crack in the concrete body 2, and a plurality of crack induction members 5, 5,... are buried at an interval in the circumferential direction in the concrete body 2, and when large external force acts in the flexural direction, the vertical reinforcements 3, 3,... extend while mutually sliding in the axial direction with the concrete body 2, and a plurality of cracks 8, 8,... are also caused in the concrete body 2.SELECTED DRAWING: Figure 1
【課題】、縦筋の局所的な伸びを緩和でき、高い曲げ靭性に優れた高曲げ靭性ＰＣ杭の提供。【解決手段】高曲げ靭性ＰＣ杭１は、コンクリート体２に一様伸びが２％以上のＰＣ鋼材からなる複数の縦筋３，３...が埋設されるとともに、縦筋３，３...の外側に環状又は螺旋状に横拘束筋４が配置され、縦筋３，３...は、コンクリート体２にひび割れを生ずる引張応力度と同等又はそれ以下の付着強度でコンクリート体２に付着され、コンクリート体２には、周方向に間隔を置いて複数のひび割れ誘発部材５，５...が埋設され、曲げ方向に大きな外力が作用した際、縦筋３，３...がコンクリート体２と軸方向で互いに摺動しつつ伸長し、且つ、コンクリート体２に複数のひび割れ８，８...が生じるようにしている。【選択図】図１
HIGH FLEXURAL TOUGHNESS PC PILE
PROBLEM TO BE SOLVED: To provide a high flexural toughness PC pile capable of relieving a local elongation of a vertical reinforcement, and excellent in high flexural toughness.SOLUTION: In a high flexural toughness PC pile 1, a plurality of vertical reinforcements 3, 3,... composed of a PC steel material of 2% or more in a uniform elongation, are buried in a concrete body 2, and an annular or spiral horizontal restraining reinforcement 4 is placed on the outside of the vertical reinforcements 3, 3,..., and the vertical reinforcements 3, 3,... are stuck to the concrete body 2 in sticking strength equal to or less than tensile stress intensity of generating a crack in the concrete body 2, and a plurality of crack induction members 5, 5,... are buried at an interval in the circumferential direction in the concrete body 2, and when large external force acts in the flexural direction, the vertical reinforcements 3, 3,... extend while mutually sliding in the axial direction with the concrete body 2, and a plurality of cracks 8, 8,... are also caused in the concrete body 2.SELECTED DRAWING: Figure 1
【課題】、縦筋の局所的な伸びを緩和でき、高い曲げ靭性に優れた高曲げ靭性ＰＣ杭の提供。【解決手段】高曲げ靭性ＰＣ杭１は、コンクリート体２に一様伸びが２％以上のＰＣ鋼材からなる複数の縦筋３，３...が埋設されるとともに、縦筋３，３...の外側に環状又は螺旋状に横拘束筋４が配置され、縦筋３，３...は、コンクリート体２にひび割れを生ずる引張応力度と同等又はそれ以下の付着強度でコンクリート体２に付着され、コンクリート体２には、周方向に間隔を置いて複数のひび割れ誘発部材５，５...が埋設され、曲げ方向に大きな外力が作用した際、縦筋３，３...がコンクリート体２と軸方向で互いに摺動しつつ伸長し、且つ、コンクリート体２に複数のひび割れ８，８...が生じるようにしている。【選択図】図１
HIGH FLEXURAL TOUGHNESS PC PILE
高曲げ靭性ＰＣ杭
TSUDA KAZUYOSHI (author) / ASAZUMA MASAHIRO (author) / TAKEMORI KEISUKE (author)
2017-02-02
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
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Gründungen
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