Drilling device

Details Drilling device Drilling device

1989-11-02

1990-12-25

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405260, 175386, 175402, E21B 300, E21D 2000

Patent

active

049798480

ABSTRACT:
A process for protecting nonstable or moderately stable, cohesionless to slightly cohesive geologic formations, in particular, in tunnel construction, in which drill holes are first made by boring into the formation and, following completion of the boring, the drilling rod is removed. During this removal a hardenable injection material is forced into the drill hole, whereby, using a drilling rod, a pointed rod or anchoring element is placed in position in the boring. This element remains in the boring during removal of the drilling rod, and is solidly connected to the formation by the injection material.

REFERENCES:
patent: Re32076 (1988-02-01), Dziedzic
patent: 2667037 (1954-01-01), Thomas et al.
patent: 3306051 (1967-02-01), Howlett
patent: 3682260 (1972-08-01), Klemm
patent: 3973409 (1976-08-01), Asayama
patent: 4253781 (1981-03-01), Fischer et al.
patent: 4718791 (1988-01-01), Weatherby

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