Mining or in situ disintegration of hard material – Processes – Forming blocks
Patent
1976-03-10
1977-04-26
Gilliam, Paul R.
Mining or in situ disintegration of hard material
Processes
Forming blocks
61 36A, 61 63, 299 11, E02D 700
Patent
active
040193314
ABSTRACT:
The method of converting clayey or silty soil into stable and solid underground columns or piles suitable for carrying a building structure, comprises first the drilling of bores of a diameter considerably smaller than the external diameter of the column or pile to be created, to a predetermined depth, and secondly directing a focused laser beam gradually across the entire surface of each bore by mechanical and optical means, in such a manner that each point of the bore surface is irradiated and heated at an intensity sufficient for converting the soil surrounding the bore into a solid permanent mass of a predetermined thickness measured from the bore surface, which mass retains its strength and is resistant to moisture and temperature.
REFERENCES:
patent: 3154370 (1964-10-01), Johnson
patent: 3539221 (1970-11-01), Gladstone
patent: 3544165 (1970-12-01), Snedden
patent: 3693718 (1972-09-01), Stout
patent: 3693731 (1972-09-01), Armstrong et al.
patent: 3807182 (1974-04-01), Schnabel, Jr.
patent: 3871485 (1975-03-01), Keenan, Jr.
patent: 3885832 (1975-05-01), Altseimer et al.
Alterman Israel
Rom Josef
Schwartz Joseph
Alterman Israel
Gilliam Paul R.
Grosz Alexander
Technion Research and Development Foundation Ltd.
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