Rock anchor and method of manufacture

Details Rock anchor and method of manufacture Rock anchor and method of manufacture

E - Fixed Constructions

21

B

26/111, 61/47

E21B 41/00 (2006.01) D07B 1/00 (2006.01) D07B 7/18 (2006.01) E02D 5/80 (2006.01) E21D 21/00 (2006.01)

Patent

CA 2002806

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) .

Dispositif d'ancrage dans le roc (10) caractérisé par un câble (12) constitué de plusieurs torons (14, 15) et comportant au moins une partie renflée (16) dans laquelle tous les torons (14, 15) sont séparés et répartis à la périphérie (17) du renflement. Le câble (12) est constitué de plusieurs torons extérieurs (14) disposés en hélice autour d'un toron central (15). Dans chacune des parties renflées (16), le toron central (15) et les torons extérieurs (14) sont disposés à la périphérie du renflement.

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