US 7,320,371 B2
Method and device for producing pretensioned anchorings
Josef Mocivnik, Fohnsdorf (Austria); Renè Egger-Mocivnik, Judenburg (Austria); Alfred Wagner, Linz (Austria); and Karl Böhm, Holzhausen (Austria)
Assigned to “ALWAG” Tunnelausbau Gesellschaft m.b.H., Pasching (Austria)
Filed on Sep. 20, 2006, as Appl. No. 11/523,669.
Application 11/523669 is a continuation of application No. PCT/AT2005/00101, filed on Mar. 22, 2005.
Claims priority of application No. A 509/2004 (AT), filed on Mar. 23, 2004.
Prior Publication US 2007/0012482 A1, Jan. 18, 2007
Int. Cl. E21B 7/20 (2006.01); E02D 5/74 (2006.01); E02D 23/08 (2006.01)
U.S. Cl. 175—57  [175/171; 405/244; 405/249; 405/251] 20 Claims
OG exemplary drawing
 
1. A method for drilling a hole in soil or rock material and for forming an anchoring in said hole, said method comprising
forming a borehole by introduction of a drill bit mounted on a drill rod assembly,
introducing a jacket tube into the borehole during the drilling procedure,
separating the drill rod assembly from the drill bit and removing the drill rod assembly from the borehole upon completion of the borehole,
securing the jacket tube to a borehole wall in an end region facing the borehole interior,
feeding a curable fluid into a free space between an outer periphery of the jacket tube and an inner periphery of the borehole wall,
tensioning of the anchor-forming jacket tube prior to a final solidification of the curable fluid, and
introducing the curable fluid into the free space between the outer periphery of the jacket tube and the inner periphery of the borehole wall via passage openings provided about a periphery of the jacket tube.