Friction rock stabilizer and method for insertion thereof in an

Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor

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Details

29451, 403344, 403409, 411479, 411522, E21D 2100, E21D 2000

Patent

active

043136966

ABSTRACT:
The stabilizer, in a preferred embodiment thereof, comprises a generally tubular body which is axially slit, as in the prior art. According to one practice of the invention, the surfaces of the body immediately adjacent to the slit have ribs formed thereon which define bearing surfaces for clamping together, to draw the surfaces into proximity, narrowing the slit, thereby to contract the stabilizer to a constrained dimension approximately eight percent smaller than its free dimension. This is done to facilitate its insertion into an undersized bore. The novel method, then, in an embodiment thereof, comprises contracting an axially slit friction rock stabilizer by engaging the aforesaid ribs (formed thereon) with a tool, to contract the stabilizer to a reduced and constrained, approximately eight percent smaller, cross-sectional dimension, inserting the stabilizer into an undersized bore, and withdrawing the tool.

REFERENCES:
patent: Re30256 (1980-04-01), Scott
patent: 719817 (1903-02-01), Kunze
patent: 2177231 (1939-10-01), Tinnerman
patent: 2180271 (1939-11-01), Arras
patent: 3425757 (1969-02-01), Minor
patent: 3701555 (1972-10-01), Harris
patent: 4109684 (1978-08-01), Fernandez
patent: 4142704 (1979-03-01), Murray

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