Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1997-10-14
1999-11-16
Bagnell, David
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
405269, E21D 2002, E21D 2100
Patent
active
059845880
ABSTRACT:
Method for the stabilisation of rock masses, especially vaults or walls of tunnels being excavated, comprising the insertion of a hollow tubular element (10) having an open top and provided with at least a spiral-shaped conical-development element (20, 26) within a hole (22) drilled in the rock mass (28) to be consolidated, and the pressure-injection of consolidation material (30) in the cavity of said hollow tubular element (10).
The external diameter of said hollow tubular element (10) is smaller than the maximum hole diameter (22) by a length preferably comprised between 20 and 55 mm.
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Bagnell David
Marcegaglia S.p.A.
Mayo Tara L.
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