PHC Extending apparatus of PHC pile tip using unit plate and manufacturing method of it

摘要

The present invention relates to a tip expanding mechanism of a PHC file using a split plate, a manufacturing method thereof, and a manufacturing method of a disk for a tip expanding mechanism of a PHC file. A method of manufacturing a disk for a tip extender of a PHC file according to the present invention comprises the steps of: (100) forming a plate made of a material selected from carbon steel or alloy steel; A plurality of figures 200 having a convex portion 210 formed on one side and a concave portion 220 formed on the opposite side of the convex portion 210 are cut out, A cutting step of cutting one side of the other figure (202) to be inserted into the concave part of the other figure (201); A cutting step of cutting a plurality of divided plates (300) along the rim of the cut figures (200); And a pre-welding step of manufacturing a disk for manufacturing an extender of the PHC pile by welding the split plates (300) manufactured in a state of being back to the disk shape. According to the present invention, it is possible to minimize the iron plate loss by making maximum use of the space on the plate during manufacture of the disk for the end expansive mechanism, thereby improving the productivity.