| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection method which can continuously perform injection work, and can uniformly carry out natural ground consolidation in a short period of time. SOLUTION: An injection pipe 4 is produced by attaching a cap 6 to one end thereof, forming injection holes 5B, 5B' in the pipe in a longitudinal direction, and forming bag bodies 7 on the pipe so as to cover the injection holes 5B. Then, an external pipe 3 having an injection hole 5A formed therein is produced. Further, the external pipe 3 is inserted into a long hole bored in the natural ground 1, and then the injection pipe 4 is inserted into the external pipe 3. Grout is squeeze-pumped into the injection pipe 4, to thereby improve the natural ground 1.
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