Welding hoop muscle around the vertical main reinforcement of the multiple manuals which are arranged on

摘要

PROBLEM TO BE SOLVED: To provide a working method for cast-in-place concrete piles in which a steel bar cage with hook portion formed to hoops can be produced easily and highly accurately, thereby a pile having a high strength can be built, and a carrying type steel bar bender can be produced.;SOLUTION: A steel bar cage is produced by welding hoops around a plurality of longitudinal main bars arranged on an imaginary circle, this imaginary cage is erected in a pile hole formed in advance at a proposed portion for the pile installation, concrete is placed inside the pile hole, and this concrete is hardened by the cast-in-place working method for the concrete pile, a hook- shaped portion formed inwardly at the tip portion of the hoops is formed by bending the tip portion of the hoops after forming the hoops by winding the steel bars for hoops around the longitudinal main bar and before welding the hoops to the longitudinal main bars.;COPYRIGHT: (C)2002,JPO