| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground anchor re-tensioning tool capable of quickly, safely and securely releasing a fixed state of wedge pieces by man power using a light-weight device, and a method for releasing the fixed state of the wedge pieces by using the ground anchor re-tensioning tool.SOLUTION: Provided is a ground anchor re-tensioning tool, in which an outer cup has a lidded, hollow and approximately cylindrical shape and an outer cup penetration hole in the center of a lid part. On at least a part of an inner surface of the outer cup penetration hole, a tension bar female screw is formed which can be screwed to a tension bar. In the center of a support plate, a releasing member female screw part is formed into which a releasing member for releasing a fixed state of the wedge piece fitted to an inner cup can be screwed. The inner diameter of the outer cup penetration hole is set larger than the inner diameter of the releasing member female screw part, and the releasing member, when being screwed into the releasing member female screw part, presses the inner cup and the outer cup downward to release the fixed state. |
