| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground injection device forming cracks continuous in a longitudinal direction in a seal material in a region into which a ground injection material is to be injected, and injecting the ground injection material continuously in the longitudinal direction.SOLUTION: The ground injection device includes: an injection pipe (1); an elastic mold (2) coating the outer periphery of the injection pipe (1); and a heat-shrinkable member (3) coating the outer periphery of the elastic mold (2). Through-holes (1h) are formed in the injection pipe (1), the elastic mold (2) covers the injection pipe (1) from each of both sides thereof and coats the through-holes (1h), grooves (2c) extended in the longitudinal direction are formed in the outer periphery of the elastic mold (2), and slits (3s) are formed in the heat-shrinkable member (3). |
