| 摘要 |
<p>The invention provides a rock anchor which is adapted to be inserted into a drill hole or the like to be anchored therein, comprises an elongated body member which defines a longitudinal wedging surface, such wedging surface tapering outwardly in the direction of the leading end of the anchor, and a wedging member which defines a sliding surface which co-operates slidingly with the wedging surface, so that the wedging member is movable along the wedging surface from a first retracted position wherein it is disposed generally co-extensively with, or within, the lateral extent of the body member, and an extended position wherein it extends laterally from the body member to engage the inner surface of the drill hole and to wedge the body member within the drill hole; and actuator means for moving the wedging member to its extended position in use.</p> |
