The present invention, by using an external frame configured to be able to disassemble the assembly of the mold casing, minimizing the bolting operations required in assembling the mold casing to the construction of a concrete pile, and the heights (高 所) or piles die assembly in water It constructed concrete piles to easily perform tasks related to the construction and formwork system for concrete piles using this method.
In the present invention, a pair of die casing (1a, 1b) and; A horizontal frame member 20 and the vertical connecting frame member 21, the outer frame (2) surrounding the die casing is configured to include, and; The inner side of the horizontal frame member 20 is provided with a fixed coupling member 201 and is provided, it is provided with a lateral movement inside the other coupling member (202) capable of a horizontal side of the frame member 20, and; The elastic tube 3 and the inflatable member 4 is provided and; Stretching the tube (3) expanding the expansion member moves the coupling member 202 by the contraction of the (4) is moved by being coupled claim 1, 2, die casing (1a, 1b) to each other, after the completion of production of the concrete pile, expanding configuration in which member 4 is moved coupling member 202 and the fixed engaging member 201 is beoleojyeoseo first and second mold casing (1a, 1b) between the by the contraction of the height and telescopic tubes (3) are separated from each other for demoulding the construction method of the concrete piles are provided with cast-in-place concrete piles characterized by a die apparatus and for this to have a.