| 摘要 |
PROBLEM TO BE SOLVED: To reduce consumption of a hardener or a chemical by creating a columnar underground hardened matter having less irregularities by uniformly supplying the hardener or chemical. SOLUTION: A filling tube 6 provided with a jetting nozzle 10 at the side surface of the tip portion is inserted to the ground, a hardener or a chemical is supplied to the filling tube 6 under a high pressure to the filling tube 6 and injected from the jetting nozzle 10, the filling tube 6 is rotated discontinuously and is pulled out step by step every predetermined distance and a columnar underground harden matter 11 is created. COPYRIGHT: (C)2004,JPO
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