| 摘要 |
PURPOSE:To firmly secure an anchor, by a method wherein an annular drum part is mounted in the vicinity of the forward end of an anchor, an unfoldable ring member is connected to the drum part, and an anchor head, sliding in the direction of length along the inner wall of the ring member. CONSTITUTION:After a casing B and an earth anchor A are inserted into an excavated hole provided in a ground, the forward end of a drum part 11 is hooked to a terminal end part B of the casing B as a tensile material 4 is lifted up, and the tensile material 4 is further lifted up to slide an anchor head 3 along the inner wall of a slider ring 2. In which case, the slider ring 2 is slid along the inner wall of an outer ring 1 together-with the anchor head 3, the slider ring 2 and the outer ring 1 are unfolded. This causes the outer ring 1 to be pressed against a hole wall, and firm securing of the earth anchor A. |
