E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/65
E21B 11/00 (2006.01) E02D 5/36 (2006.01) E21B 7/26 (2006.01) E21B 10/44 (2006.01)
Patent
CA 1173426
TOOL FOR FORMING EARTH HOLES HAVING FIXED WALLS AND METHOD THEREFOR ABSTRACT OF THE DISCLOSURE A tool comprises two coaxial casings, a leading and a -trailing ones, connected by a tubular coupling element. The casings are provided with conical tips having spiral tape surfaces for consolidating soil. The trailing or upper casing is provided with an axial duct for feeding a fixing material into the hole through ports provided in the coupling element. The invention consists in that the diameter of the trailing casing is greater than that of leading casing. A method includes the formation of pilot hole using the leading casing, subsequent formation of the hole of a predetermined diameter using the trailing casing in the advancing sinking of the pilot hole. After the hole has been sunk to a full depth, the tool is lif- ted until it leaves the pilot hole, the fixing material is supplied into the pilot hole, and the secondary sink- ing of the hole is accomplished, while pressing the fix- ing material into walls and a bottom of the hole. The invention is useful in forming holes intended for filling piles in weak and water-saturated soils.
404955
Feklin Valentin I.
Mazo Boris M.
Dnepropetrovsky Inzhenerno-Stroitelny Institut
Swabey Ogilvy Renault
LandOfFree
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