Method and device for producing pre-tensioned anchorings

Details Method and device for producing pre-tensioned anchorings Method and device for producing pre-tensioned anchorings

E - Fixed Constructions

21

D

E21D 21/00 (2006.01) E02D 5/76 (2006.01)

Patent

CA 2559457

The invention concerns a method and device for boring, particularly percussion boring or rotary percussion boring, a hole (2) in soil or rock material and for forming an anchoring. According to the invention, a borehole (2) is formed by inserting a drill bit (4), and a casing tube (7) is placed inside the borehole (2) during the boring process. Once the borehole (2) is completed, the boring rods (5) are detached from the drill bit (4) and removed from the borehole (2). The periphery of the casing tube (7) is provided with a number of passage openings (23) for discharging hardenable material. A tensioning device (13, 14) for the anchor, particularly an anchor plate and a screw that can be screwed onto the casing tube (7), can be fixed to the end of the casing tube (7) protruding from the borehole (2). Anchoring or fixing elements (15) for anchoring the casing tube (7) on the surrounding inner wall (2) of the borehole are provided, in particular, on the end area of the casing tube (7) oriented toward the drill bit (4).

L'invention concerne un procédé et un dispositif permettant de forer, notamment de forer par percussion ou par rotopercussion, un trou (1) dans un sol ou dans un matériau rocheux et de former un ancrage. Un trou de forage (2) est formé par insertion d'une couronne de sondage (4) et un tube de gainage (7) est introduit pendant le processus de forage, dans le trou de forage (2). Une fois le trou de forage (2) terminé, le train de tiges (5) est séparé de la couronne de forage (4) et est sorti du trou de forage (2). Il est prévu que le tube de gainage (7) comprenne, au niveau de sa périphérie, une pluralité d'ouvertures de passage (22) pour évacuer du matériau durcissable. Un dispositif de serrage (13, 14) pour l'ancrage, notamment une plaque d'ancrage et une vis pouvant être vissée sur le tube de gainage (7) peuvent être fixées au niveau de l'extrémité du tube de gainage (7), en saillie du trou de forage (2). Des éléments d'ancrage et de fixation (15) pour ancrer le tube de gainage (7) contre la paroi intérieure environnante du trou de forage (2) sont prévus notamment au niveau de la zone terminale du tube de gainage (7), tournée en direction de la couronne de forage (4).

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