AN IMPROVED BORING AND SKIRTING DEVICE FOR MAKING SKIRTING TYPE FOUNDATIONS IN CIVIL ENGINEERING WORKS

摘要

An improved boring and skirting device for making skirting type foundation in civil engineering works, mounted on a movable trolley (8) provided with steering arrangement and a set of telescopic levelling screw pads (18) comprising of a helical auger cutter for making hore holes mounted at the lower end of a cutter shaft (23) a power head having a prime mover (21) and a speed reducer (22), the entire assembly is enclosed within a titable boom (3) which is hinged with vertical side supports (2) at two hinge points (4) and wire of a mechanical pulling means (7A) attached to the bottom of said boom to tilt the book in a desired vertical or horizontal position and vice versa, the said vertical side supports being rigidity mounted at the front end of the said movable trolley, fitted with a winch (28) characterised in that the power head is mounted at the top end of the cutter shaft which is enclosed in a casing pip, rigidly mounted to the bottom of the said speed reducer and having a helical auger guide (35) to maintain the cutter shaft concentric with the casing pipe and a punching bead fixed at the lower end of the casing pipe.