E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 20/02 (2006.01) E21D 21/00 (2006.01)
Patent
CA 2490111
The present invention discloses a tube (14) for rock bolts having either a cable tendon or a rod tendon. The tube is deformed to permit the tube to be coiled and yet also provide good keying between the tube and grout. In addition, a fitting (26, 46) for the rear end of the bolt is disclosed in which a grouting orifice (31) communicates with a cable passageway (34). Furthermore, the use of two or more cable anchors (57) at the far end of the bolt is disclosed where the bolt is intended to be used in poor ground conditions, such as sandstone.
L'invention porte sur un tube (14) pour boulons d'ancrage de fixation de câbles ou de fers tenseurs. Le tube, qui est déformé pour pouvoir être vissé, assure en outre un bon accrochage dans le mortier. Il est également prévu un accessoire (26, 46) se montant à l'arrière du boulon dans lequel l'orifice (31) d'introduction du mortier communique avec le passage du câble (34). En outre, on peut fixer plusieurs ancrages (57) de câbles à l'extrémité distante du boulon lorsqu'il est utilisé dans des sols tendres tels que le grès.
Industrial Roll Formers Pty Limited
Minova Australia Pty Ltd
Nelligan O'brien Payne Llp
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