| 摘要 |
<p>A rock anchor (10) characterised by a tendon (12) composed of a plurality of strands (14, 15), the tendon (12) having at least one bulbous portion (16), wherein all the strands (14, 15) in the or each bulbous portion (16) are spaced apart from one another substantially around the periphery (17) of each bulbous portion (16). The tendon (12) is comprised of a plurality of outer strands (14) helically wound around a centre strand (15). In each bulbous portion (16) the outer strands (14) and the centre strand (15) are disposed adjacent the bulb periphery (17).</p> |
