COMBINED METHOD FOR CAST-IN-PLACE PILE PRODUCTION Russian patent published in 2005 - IPC

FIELD: building, particularly pile foundation building.

SUBSTANCE: method involves drilling well; placing inventory casing pipe in well, wherein casing pipe has closed lower end and is provided with inventory electrical discharger; feeding concrete mixture in well and initiating high-voltage electrical discharges in well along with removing casing pipe and forming shaft. Well is formed by driving inventory casing pipe in ground; sealing casing pipe from top thereof and arranging check valves used for concrete mixture pouring, for supplying pressurized air and water, in upper pile part; forming channels for concrete mixture passage in casing pipe; providing above channels with self-opening valves. Electric discharger is fixedly connected to casing pipe so that discharger extends beyond lower part thereof and form lower casing pipe end closed when casing pipe is driven in ground. Inventory casing pipe is driven in ground and lower end thereof is deepened in support layer by pressing action combined with high-voltage electric discharge energy. Casing pipe is removed from ground and shaft forming is performed simultaneously with pulling static load application, feeding compressed air and initiating electrical discharges in concrete mixture.

EFFECT: increased load bearing capacity of cast-in-place pile.

6 dwg