MANUFACTURE OF EXTRA-HIGH FLEXURALLY TOUGH PC PILE

PURPOSE:To economically manufacture an extra-high flexurally tough PC pile with small labor by a method wherein longitudinal reinforcing bars are connected with a transverse retaining reinforcing bar under the condition being brought into contact with its inside by means of connectors between longitudinal and transverse reinforcing bars, each of which has an attached side engaging position and a detached side engaging position, and, after that, by tensing the longitudinal reinforcing bars in a concrete form, the transverse restraining reinforcing bar is positioned outside the longitudinal reinforcing bars. CONSTITUTION:At the coiled part side end of the longitudinal reinforcing bar inserting part 13 of each connector 12 between longitudinal and transverse reinforcing bars interposed between a transverse restraining reinforcing bar 11 and longitudinal reinforcing bars 10, an attached side engaging part 16a, which positions the longitudinal reinforcing bars 10 to positions contacting with the transverse restraining reinforcing bar 11, is provided, while, at its other end, a detached side engaging part 16b is provided. By inserting the longitudinal reinforcing bars 10 in the attached side engaging parts 16b, abutting the transverse restraining reinforcing bar 11 against the outside of the longitudinal reinforcing bars 10 and coiling the coiled parts 15 round the outside of the bar 11, the bars 10 and 11 are connected with each other so as to be assembled in the form of a cylinder.