| 摘要 |
An anchor element (1, 31) is provided with a body (8, S, 40a, 40b) of bonded particulate material, eg. a sleeve of silicate bonded sands. The element (1, 31) is received in a borehole (B. B1, B2) with the sleeve adjacent the blind end. When a compressive force is applied between the ends of the body, the particles move closer together to form an annulus of compacted particulate material bridging the element and the wall of the borehole (B, B1, B2). |
