Tool for formation of holes in macroporous compressible soils

Details Tool for formation of holes in macroporous compressible soils Tool for formation of holes in macroporous compressible soils

E - Fixed Constructions

21

B

255/65

E21B 11/02 (2006.01) E02D 7/22 (2006.01) E21B 7/26 (2006.01) E21B 10/44 (2006.01)

Patent

CA 1173427

TOOL FOR FORMATION OF HOLES IN MACROPOROUS COMPRESSIBLE SOILS ABSTRACT The tool body has a cylindrical calibrating portion, co- axial portions with surfaces for the compaction of the soil and radii decreasing stepwise in the direction away from the calibrating portion, and terminating in an end piece. The body has also transition portions with surfaces for the compaction of the soil, forming a smooth transition from a coaxial portion of a larger radius to an adjacent coaxial portion with a smaller radius. The invention consists in that the surface for the com- paction of the soil of each coaxial portion is a conical sur- face having the configuration of a ribbon wound from the cali- brating portion to the end piece and comprising the transition portions. The invention is useful for the formation of holes for cast-in-place piles, particularly short ones, in soft satura- ted soils.

406263

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