JET UNIT FOR ERECTION OF BORED PILES Russian patent published in 1996 - IPC

FIELD: construction. SUBSTANCE: jet unit for erection of bored piles has triangular frame, carriage of hydraulic giant and hydraulic giant attached to it. Hydraulic giant consists of rotator, swivel, pipe string and giant head. Hydraulic giant carriage and hydraulic giant are installed on inclined member of frame with pipe string of hydraulic giant resting on roller support. Mounted on frame are fixed and movable platforms. Attached to fixed platform is body of hydraulic cylinder, and its rod is connected with movable platform. Hydraulic giant carriage with the help of rope engaged with blocks forms closed kinematic system with pulley block located on movable platform. EFFECT: higher efficiency. 2 dwg