PROBLEM TO BE SOLVED: To provide a bolt holder mounted in a joint pipe in a steel pipe pile for use in connection of the steel pipe pile, the bolt holder that facilitates mounting of the bolt, the alignment between the tip of a bolt shaft section and a bolt hole of the joint pipe, and the work of drawing a tip portion of the bolt shaft section to the outside of the steel pipe pile.;SOLUTION: A bolt holder 24 is mounted to a joint pipe 23 disposed inside of steel pipe piles 21, 22. A head 251 of a bolt 25 is held to a bolt head holding member 243, and a tip portion of a bolt shaft section 252 is inserted and held to the bolt hole 231 of the joint pipe 23. A male screw part 253 of the bolt 25 is drawn to the outside of the steel pipe pile 22 by using a bolt extractor, and a nut 26 is screwed and bolted to the male screw part 253.;COPYRIGHT: (C)2016,JPO&INPIT
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