| 摘要 |
PURPOSE: To firmly connect an anchor for coupling and a borehole wall, by unrotatably fixing a cover body to a mooring portion, and extending it along the mooring portion in the axial direction at least over a certain peripheral face zone. CONSTITUTION: When an anchor rod 10 covered with a net-like collar is screwed into a blind hole filled with mortar, wires of the net-like collar make the reinforcing action of the solidified mortar as one kind of a reinforcing body after the mortar is stuck, and the good fixing action of the anchor rod 10 is obtained. A composite anchor of the anchor rod 10 has a smooth fixing region 11 and a conical region 12 constituted of a plurality of conical portions 13, the net-like collar is unrotatably fixed to the smooth fixing region 11 and the conical region 12 as a cover body, and it is extended along the smooth fixing region 11 and the conical region 12 in the axial direction at least over a certain peripheral face zone. |
