E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
61/69, 61/85
E02D 5/30 (2006.01) E02D 3/12 (2006.01) E02D 5/54 (2006.01) E21B 33/12 (2006.01) E21B 33/13 (2006.01)
Patent
CA 1159268
ABSTRACT OF THE DISCLOSURE A method of reinforcing a piling structure by means of a precast concrete pile and hydraulic sealing apparatus which comprises the steps of: driving a hollow, precast concrete pile into the ground by means of a pile driver, the pile being formed with thin and frangible portions disposed in its inner peripheral wall, holding in suspension a hydraulic cylinder fitted with a resilient rubber packing thereunder at a desired level within the hollow body of the pile, filling the hydraulic cylinder with oil to cause radial swelling of the rubber packing to such an extent that the deformed rubber closes the clearance between itself and the inner periphery of the pile body and thus defines therewith a sealed hollow space under the rubber packing, and pumping pressurized mortar through a hose into the sealed hollow space of the pile until the thin and frangible portions of the pile burst open from increasing internal pres- sure thus enabling the internal mortar to move out through the apertures and penetrate the surrounding soil, with the later hardened masses of mortar solidifying the surrounding ground and serving as claws protruding outwardly from within the : pile body to prevent settlement of the embedded pile. A plurali- ty of such claws can be formed along the length of the pile by separate injection of mortar into the divided, sealed hollow sections of the pile body from the lower to the higher section. A hollow, precast concrete pile particularly suitable for use in the method has a tapered point and a plurality of spaced-apart recesses disposed in its inner peripheral wall and in an upward- ly spiraling configuration along the length of the pile.
393507
Lin Juei-Tse
Marks & Clerk
LandOfFree
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