| 摘要 |
PURPOSE:To perform grouting work in a short time, by a method wherein a sensing member is buried being dispersed in a ground by dint of explosion waves, and after a solidifying agent is injected with pressure into theground, radio waves are emitted, and a reflecting wave reflected by the sensing member is detected. CONSTITUTION:A sensing return material 3, having an electric detonator 5, connected to a fuse 4, and high explosive 6, is buried in the outer periphery body of a bit 2, and the bit 2 is installed to the tip of a injection pipe 1. When, after the injection pipe 1 is inserted into a ground A to place the bit 2 in a given depth, the high explosive 6 is exploded through actuation of an igniting device, the sensing return member 3 is dispersed around the tip of the injection pipe 1 and the dispersed return materials are buried in a ground A. After a solidifying agent is injected through the injection pipe 1, an iron rod 8, to which a radio sensor 7 is attached, is inserted into the injection pipe 1 to lower the sensor 7 down to a portion in the vicinity of the tip of the injection pipe 1. When radio waves are emited from the sensor 7, the radio waves are reflected by the sensitive return material 3, and the reflected waves are detected by the sensor 7. |
