Rock anchor and method of manufacture

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

1993-05-13

1994-09-06

Reese, Randolph A.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405258, 29461, 72302, E21D 2000

Patent

active

053442563

ABSTRACT:
A rock anchor is formed from a tendon composed of a plurality of strands. The tendon has at least one bulbous portion wherein all the strands in the bulbous portion are spaced apart from one another substantially around the periphery of each bulbous portion. An apparatus for manufacturing the rock anchor includes a series of opposed plates disposed on opposite sides of the tendon and controlled by respective hydraulic rams to clamp the tendon between the opposing plates. The clamps are sequentially displaced longitudinally by a dedicated hydraulic ram to form the bulbous portion between adjacent clamps.

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