| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection apparatus for a high-pressure injection method in which efficiency of reaching of a jet-flow is improved and a range of reaching is extended further, and a ground improvement method according to the high-pressure injection method.SOLUTION: An injection apparatus for a high-pressure injection method comprises a rod 9 in which a liquid used for the high-pressure injection method passes inside, and first, second and third injection nozzles 1, 2 and 3 which are disposed in order in a length direction of the rod and inject the liquid in a horizontal direction. A nozzle diameter of the second injection nozzle 2 disposed in the center is smaller than those of the first and third injection nozzles 1 and 3 which are disposed in both ends. |
