METHOD AND DEVICE FOR MOULDING OF CAST-IN- PLACE PILE IN GROUND Russian patent published in 2000 - IPC

FIELD: civil engineering, in particular, construction equipment intended for moulding of cast-in-place piles and production of floor bedding on ground. SUBSTANCE: the method includes operations in driving of a longitudinal cavity (bore-hole) in the vertical or inclined direction with a subsequent filling of it with a fixing mortar, for instance, with concrete one. The novelty of the invention is in the fact that before driving of the longitudinal cavity fixing mortar is injected about the longitudinal axis of the cast-in-place pile to be moulded, and then the cast-in-place pile is moulded in the ground zone being injected. The device for realization of the method has a percussion mechanism, expander, fixing mortar feeding pile-line. The novelty of the device is the fact that it is provided with radial protrusions projecting from the peripheral outline of the device. The radial protrusions have longitudinal ducts and lateral ducts communicating with them outcoming to the surface of the radial protrusions; the longitudinal ducts are connected to a pump feeding the injection mortar. EFFECT: enhanced efficiency of driving of bore-holes in grounds both with a high strength and low one. 9 cl, 11 dwg