Improved sliding anchor

E - Fixed Constructions – 21 – D

Patent

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Details

E21D 21/00 (2006.01)

Patent

CA 2660496

The invention relates to a sliding anchor bolt (10) for introduction into a bore. The sliding anchor bolt (10) has a anchor bolt rod (12), disposed on which is a sliding control element (14) having a through-opening (18), through which the anchor bolt rod (12) extends. The sliding control element (14) comprises a sliding body cage (16) having at least one recess (20) for receiving a sliding body (22) that is in contact with the lateral surface of the anchor bolt rod (12). For precise and repeatable setting of a predefined breakaway force, each recess (22) for receiving a sliding body (22) is disposed in the sliding body cage (22) tangentially relative to the lateral surface of the anchor bolt rod (12). Furthermore, the lateral enveloping surface of each recess (20) projects by a predefined dimension into the free cross section of the through-opening (18), and each sliding body (22) fills the cross section of the recess (20) associated with it.

L'invention concerne un ancrage coulissant (10) à introduire dans un forage. L'ancrage coulissant (10) possède une barre d'ancrage (12) sur laquelle est disposé un élément de commande coulissant (14) pourvu d'une ouverture de passage (18) à travers laquelle s'étend la barre d'ancrage (12). L'élément de commande coulissant (14) comprend une cage (16) de corps coulissant, qui possède au moins un évidement (20) pour recevoir un corps coulissant (22) qui se trouve en contact avec la surface périphérique de la barre d'ancrage (12). Afin de régler d'une manière précise et reproductible une force de décollement préfinie, chaque évidement (20) destiné à recevoir un corps coulissant (22) est disposé dans la cage (16) de corps coulissant tangentiellement à la surface périphérique de la barre d'ancrage (12). De plus, la surface d'enveloppe périphérique de chaque évidement (20) dépasse dans une mesure prédéfinie dans la section libre de l'ouverture de passage (18), et chaque corps coulissant (22) remplit la section de l'évidement (20) qui lui est associé.

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