Patent ID: 7465128
Filing Date: 2008-12-16
Classification: E21D

Abstract:
1. Anchoring device for stabilising an excavation wall, and to be at least partially engaged into a bore drilled into the excavation wall, said anchoring device comprising: an elongated rigid rod, defining a distal end for engagement into the drilled bore, a proximal end opposite said distal end and a longitudinal axis extending in between said distal and said proximal end thereof; a bearing member mounted on said rigid rod proximate to said proximal end thereof, for bearing against an exterior surface of the rocky bed; and an anchoring head mounted on said rigid rod and for engagement into the drilled bore of the excavation wall, said anchoring head comprising: wherein for anchoring said anchoring head into the excavation wall at the level of the bore drilled therein, said actuation member and said expansion sheath must be moved relative to one another so as to enter into contact with one another, and in such a way as to enable said actuation member to exert a pressure on said expansion sheath to generate radial expansion of at least one portion of the latter, so that said portion of said expansion sheath comes to frictionally abut against a part of the internal surface circumscribing the drilled bore in the excavation wall.