The invention discloses a rapid
pile cutting device and method for a cast-in-place
pile, and belongs to the field of underground
pile foundation construction. The pile
cutting device comprises a first separation disc, a second separation disc, a central sleeve and a connecting rod. Each of the first separation disc and the second separation disc comprises a center hole, an overflow hole and a reinforcing
steel bar hole which correspond to each other in position; convex
eaves are arranged at the two ends of the central sleeve; arc-shaped groove holes are formed in the same sides of all the
steel bar holes of the first separation disc, and a connecting rod is arranged on the upper surface of the first separation disc. The first separation disc and the second separation disc are arranged in an overlapped mode,
slurry and concrete can smoothly pass through the overflow holes, after concrete pouring is completed, the first separation disc is rotated to enable the overflow holes to be staggered, a stress weak face can be formed at the interface of the first separation disc and the second separation disc, and when a pile is
cut, only the connecting rod needs to be pulled, and the pile can be
cut. The weak face can be used for integrally removing the first separation disc and redundant concrete above the first separation disc, the construction efficiency is greatly improved, and the pile top quality after pile
cutting is guaranteed.