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A platform for research: civil engineering, architecture and urbanism
EXTENDED STEEL PIPE, STEEL PIPE FOR GROUND REINFORCEMENT, AND CONSTRUCTION METHOD USING THE SAME
To provide an extended steel pipe that a joining action of a steel pipe at a site is unnecessary or minimized, thereby significantly reducing a work time and the amount of the work in a ground reinforcement construction of a tunnel and the like.SOLUTION: Steel pipes 1A and 1B having different diameters are combined and an extended steel pipe in which one or more inner steel pipes having a smaller diameter can be nested inside an inner side of a steel pipe having the maximum diameter is made. The extended steel pipe includes a return prevention mechanism 30 inside thereof that locks the steel pipe at a withdrawal position when the steel pipe is withdrawn to be in an extended state.SELECTED DRAWING: Figure 2
【課題】トンネルの地山補強工事等において、現場での鋼管の接合作用を不要或いは最小限にし、それにより作業時間及び作業量を大幅に軽減する延伸鋼管を提供する。【解決手段】径の異なる複数の鋼管１Ａ，１Ｂを組み合わせ、最大径の鋼管の内側にそれより径の小さい１つないし複数の内側鋼管を入れ子状に収納可能にした延伸鋼管とする。この延伸鋼管は、鋼管を引き出して延長状態にしたときに、引き出した位置で鋼管をロックする戻り防止機構３０が内部に備えられている。【選択図】図２
EXTENDED STEEL PIPE, STEEL PIPE FOR GROUND REINFORCEMENT, AND CONSTRUCTION METHOD USING THE SAME
To provide an extended steel pipe that a joining action of a steel pipe at a site is unnecessary or minimized, thereby significantly reducing a work time and the amount of the work in a ground reinforcement construction of a tunnel and the like.SOLUTION: Steel pipes 1A and 1B having different diameters are combined and an extended steel pipe in which one or more inner steel pipes having a smaller diameter can be nested inside an inner side of a steel pipe having the maximum diameter is made. The extended steel pipe includes a return prevention mechanism 30 inside thereof that locks the steel pipe at a withdrawal position when the steel pipe is withdrawn to be in an extended state.SELECTED DRAWING: Figure 2
【課題】トンネルの地山補強工事等において、現場での鋼管の接合作用を不要或いは最小限にし、それにより作業時間及び作業量を大幅に軽減する延伸鋼管を提供する。【解決手段】径の異なる複数の鋼管１Ａ，１Ｂを組み合わせ、最大径の鋼管の内側にそれより径の小さい１つないし複数の内側鋼管を入れ子状に収納可能にした延伸鋼管とする。この延伸鋼管は、鋼管を引き出して延長状態にしたときに、引き出した位置で鋼管をロックする戻り防止機構３０が内部に備えられている。【選択図】図２
EXTENDED STEEL PIPE, STEEL PIPE FOR GROUND REINFORCEMENT, AND CONSTRUCTION METHOD USING THE SAME
延伸鋼管、地山補強用鋼管、及び、それを用いた施工方法
YOSHIDA HIDENORI (author) / KIMURA HIDEAKI (author) / FUKUSHIMA YOSHIKAZU (author) / SATO FUMIHIKO (author)
2022-06-24
Patent
Electronic Resource
Japanese
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