| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method, hardly generating an unimproved area even in a foundation including gravel and pebble, capable of easily establishing a circular improvement area and fan-shaped improvement area of a large improvement diameter, and capable of easily establishing a composite improvement area and a substantially rectangular improvement area suitable for forming a lattice shape.SOLUTION: A plurality of injection nozzles 2A and 2B of two places or more for injecting a hardener liquid jet flow at a predetermined angle in the rod 1-plane direction (the circumferential direction) under high pressure, are arranged in a tip part of a rod 1 so as to have a different rotary shaft, and the rod 1 is rotated or rotated at the predetermined angle while injecting the hardener liquid jet flow from the plurality of injection nozzles 2A and 2B in the same establishment plane foundation, and is thereby kneaded with the foundation by injecting a plurality of hardener liquid jet flows from the respectively different injection angles (the injection directions) into a predetermined area of the same establishment plane foundation.</p> |
