A single-waisted multi-leaf cylinder drill bit and a hole-forming construction method for bored piles
A technology of bored cast-in-place piles and construction methods, which are applied to drill bits, sheet pile walls, drilling equipment, etc., can solve problems such as difficulties in bored cast-in-place piles, and achieve the effects of good wall protection, good guidance, and reduced scouring.
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[0025] Such as figure 1 , 2 As shown, the present invention discloses a single-waist multi-lobe cylindrical drill bit for bored piles, including a single-waist multi-lobe tapered drill bit 10, and a positioning guide cylinder 6 is fixedly welded at the end of the single-waist multi-lobe tapered drill bit 10. A plurality of positioning and guiding cylinder tungsten steel heads 7 are distributed on the circumference edge of one end of the positioning guiding cylinder 6 .
[0026] Further, the single waist multi-lobe tapered drill bit 10 includes a drill rod 1, and the outer peripheral surface of the drill rod 1 is fixedly welded with several horizontal leaves 3, and several horizontal leaves 3 are connected in series through the horizontal ring 2; the drill rod 1 and the horizontal ring 2 are connected by several oblique leaves 4, and the ends of the oblique leaves 4 of the drill pipe 1 are fixedly welded with a triangular drill bit 9, and the triangular drill bit 9 is located ...
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