Coming up detection manner of the coming up detection device and the reinforced basket of the reinforced basket, installing the reinforced basket in the borehole which

摘要

PROBLEM TO BE SOLVED: To provide a simply-constituted detector capable of detecting the floating of a reinforcement cage when concrete is placed in a hole wherein the reinforcement cage for a method for constructing an underground concrete structure is arranged.;SOLUTION: This detector comprises: a wire 140, the leading end of which is attached to a leading end of a reinforcement 22A constituting the reinforcement cage; a winding mechanism 120 which applies an upward tensile force to the wire 140 by applying a turning force to a winding frame 122 by means of a spiral spring 121; and an alarm mechanism 130 which permits the supply of electric power to a buzzer 133 and an LED lamp 134 from a battery 135, because the winding frame 122 for the wire 140 is turned and a magnet 136 gets closer to a reed switch 131, when the reinforcement cage floats.;COPYRIGHT: (C)2010,JPO&INPIT