A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
STEEL PIPE
PROBLEM TO BE SOLVED: To provide a steel pipe having a recess specification of not reducing compressive performance in the pipe axis direction, by also avoiding reduction in sticking performance between sediment and concrete in the ground.SOLUTION: The present invention relates to a steel pipe 1 for forming a recess part 2 on a steel pipe outer peripheral surface 1a. The steel pipe 1 of applying the present invention comprises a straight pipe part 3 formed in a substantially straight pipe shape by extending in the pipe axis direction Y and the recess part 2 formed in a recess shape toward the inside in the pipe axis orthogonal direction X. The recess part 2 has substantially the same plate thickness as the straight pipe part 3, and the recess depth (a) formed in a more recessed shape than an outer peripheral surface 3a of the straight pipe part 3, satisfies the predetermined relationship in the relationship between a steel pipe outer diameter D and a steel pipe plate thickness (t).
【課題】地盤内の土砂やコンクリート等との付着性能の低下を回避すると同時に、管軸方向の圧縮性能を低下させない窪み仕様を有した鋼管を提供する。【解決手段】鋼管外周面１ａに窪み部２が形成された鋼管１に関する。本発明を適用した鋼管１は、管軸方向Ｙに延びて略直管状に形成された直管部３と、管軸直交方向Ｘの内側に向けて凹状に形成された窪み部２とを備える。窪み部２は、直管部３と略同一の板厚を有するとともに、直管部３の外周面３ａよりも凹状に形成された窪み深さａが、鋼管外径Ｄ及び鋼管板厚ｔとの関係で、所定の関係を満足するものとなる。【選択図】図４
STEEL PIPE
PROBLEM TO BE SOLVED: To provide a steel pipe having a recess specification of not reducing compressive performance in the pipe axis direction, by also avoiding reduction in sticking performance between sediment and concrete in the ground.SOLUTION: The present invention relates to a steel pipe 1 for forming a recess part 2 on a steel pipe outer peripheral surface 1a. The steel pipe 1 of applying the present invention comprises a straight pipe part 3 formed in a substantially straight pipe shape by extending in the pipe axis direction Y and the recess part 2 formed in a recess shape toward the inside in the pipe axis orthogonal direction X. The recess part 2 has substantially the same plate thickness as the straight pipe part 3, and the recess depth (a) formed in a more recessed shape than an outer peripheral surface 3a of the straight pipe part 3, satisfies the predetermined relationship in the relationship between a steel pipe outer diameter D and a steel pipe plate thickness (t).
【課題】地盤内の土砂やコンクリート等との付着性能の低下を回避すると同時に、管軸方向の圧縮性能を低下させない窪み仕様を有した鋼管を提供する。【解決手段】鋼管外周面１ａに窪み部２が形成された鋼管１に関する。本発明を適用した鋼管１は、管軸方向Ｙに延びて略直管状に形成された直管部３と、管軸直交方向Ｘの内側に向けて凹状に形成された窪み部２とを備える。窪み部２は、直管部３と略同一の板厚を有するとともに、直管部３の外周面３ａよりも凹状に形成された窪み深さａが、鋼管外径Ｄ及び鋼管板厚ｔとの関係で、所定の関係を満足するものとなる。【選択図】図４
STEEL PIPE
鋼管
MYONAKA SHINJI (author) / TERADA YOSHIO (author) / KIMURA HIDEAKI (author) / ISHIBASHI SEIJI (author)
2015-12-10
Patent
Electronic Resource
Japanese
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