E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 21/00 (2006.01) E21B 10/36 (2006.01)
Patent
CA 2691198
Disclosed are a method and a device for drilling, particularly percussion drilling or rotationally drilling, a hole (2) in ground or rock material and forming a brace in said hole (2). According to the invention, a borehole (2) is formed by a bit (7) that is mounted on drilling rods (1), and a brace is formed by at least one expanding element (12) that is mounted along the circumference of the drilling rods (1) and is brought, especially by expanding the same, into a position in which the expanding element (12) penetrates or rests against the material (22) surrounding the borehole (2), thus allowing for reliable bracing immediately after creating a borehole (2).
L'invention concerne un procédé et un dispositif utilisés pour percer un trou de forage (2), de préférence par perçage à percussion ou par perçage rotopercutant, dans le sol ou dans un matériau rocheux et pour former un ancrage dans ledit trou de forage (2). Selon l'invention, un trou de forage (2) est formé par une couronne à diamants (7) montée sur un train de tiges (1). Une fois le trou de forage (2) terminé, il est prévu de former un ancrage au moyen d'au moins un élément écarteur (12) monté sur la périphérie du train de tiges (1), ledit élément écarteur étant placé dans une position dans laquelle il pénètre dans le matériau (22) entourant le trou de forage (2) ou bien dans laquelle il repose sur ledit matériau, ledit élément étant notamment écarté, ce qui permet d'obtenir un ancrage fiable dès que le trou de forage (2) est terminé.
Bohm Karl
Karpellus Walter
Dywidag-Systems International Gmbh
Fetherstonhaugh & Co.
LandOfFree
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