| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to maintain tensile force without breaking steel bar even in the case the ground rises by frost heaving. SOLUTION: One end side of a steel bar 3 is fixed to the ground 1, and the head section side is strained by taking reaction force and is fixed to the ground 1 with a head anchorage device 7 through a bearing plate 18. An elastic member 20 making the steel bar 3 have tensile force by elastic deformation is provided between the head anchorage device 7 and bearing plate 18 in a state to have the elastic deformation corresponding to the length of movement in the case the bearing plate 18 is moved by at least frost heaving of the ground 1. In the case of the frost heaving, the increase of tensile force applied to the steel bar 3 is eased by elastic deformation of the elastic member 20.
|
