Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1989-07-26
1992-05-12
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
4052591, 411 65, 411 77, E21D 2100
Patent
active
051121603
ABSTRACT:
This invention relates to a rock anchor which includes an elongated element which is composed of a plurality of elongated tension members which are arranged around the long axis of the elongated element in a circumferential spaced relationship to provide a passage through the elongated element, slots between the tension members which extend over the length of the elongated element, an anchor at one end of the elongated element, for holding the element in a hole and a tensioning arrangement at the other end of the element for use in tensioning the elongated element in the hole. The anchor is preferably a wedge anchor and the invention extends to a method of anchoring the rock anchor in a hole by means of a rod which is passed up into the elongated element from the mouth of the hole to tension the elongated element and activate the wedge anchor to lock the anchor against the side of the hole to hold the elongated element in the hole under tension. The invention also includes a method of grouting the rock anchor into the hole by pumping grout into the elongated element passage and from the passage through the slots between the tension members into the hole.
REFERENCES:
patent: 1848142 (1932-03-01), Peirce
patent: 2804797 (1957-09-01), Seely
patent: 3128666 (1964-04-01), Baker
patent: 3455200 (1969-07-01), Cumming
patent: 3797254 (1974-03-01), Askey et al.
patent: 4092814 (1988-06-01), Kern
patent: 4312604 (1982-01-01), Fu et al.
Jensen Erik D.
Wood Richard R.
Delkor Technik Limited
Taylor Dennis L.
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