JPS6438687A - Method for laying marking body for searching embedded object - Google Patents

Abstract

PURPOSE:To prevent that the position or laying posture of a marker varies at the time of the back-filling by earth and sand, by pulling off a guide jig for guiding the marker (marking body) to a laying position after the back-filling by earth and sand. CONSTITUTION:A marker 1 is constituted by receiving a searching signal responding means such as an LC resonance circuit in a case 102 having a through-hole 101 at the central part thereof. At first, a plurality of markers 1a, 1b,... are respectively set by inserting rod-shaped guide jigs 2 through the through-holes 101 thereof. Subsequently, each guide jig 2 is erected so that the leading end thereof is positioned in the vicinity (marker laying position) of an embedding object 3. Continuously, when the stopper release button 202 provided to the guide jig 2 is pushed, the marker 1a present at the lowermost position falls to be placed at the position determined by the guide jig 2. herein, the excavated earth and sand are again returned to the excavated part while the guide jig 2 is erected. When the earth and sand reach a depth preventing the movement of the marker 1a, the guide jig 2 is pulled off and the remaining earth and soil are further allowed to fill the excavated part to complete the laying of the marker 1a simultaneously with the completion of embedding construction.