Process for driving and cementing in ground anchors, apparatus a

Details Process for driving and cementing in ground anchors, apparatus a Process for driving and cementing in ground anchors, apparatus a

1987-03-26

1988-03-22

Cohan, Alan

Hydraulic and earth engineering

Earth treatment or control

Chemical

405262, 405260, 405236, 405232, E02D 580, E02D 726

Patent

active

047325100

ABSTRACT:
Process using a ground anchor (1) with a longitudinal hole (7), on which is fitted an interface device (12) comprising a cylinder containing a chamber connected to the said hole (7); a grout is pumped under pressure to the tip (6) of the hole in the ground; the cylinder is struck mechanically, and transmits the mechanical shock wave to the ground anchor. The grout injected is a liquid mix (L); the grout is injected by means of a pump (21) at a pressure greater than 20 MPa; the grouting pressure is sufficient to fragment the ground by means of the injected grout, and the cylinder is struck by a percussion/vibration hammer (2) at a frequency greater than 10 Hz.

REFERENCES:
patent: 3222873 (1965-12-01), Williams
patent: 3371494 (1968-03-01), Lagerstrom
patent: 3377807 (1968-04-01), Nave
patent: 3808820 (1974-05-01), Bodine
patent: 4029158 (1977-06-01), Gerrish
patent: 4257722 (1981-03-01), Nakajima

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