| 摘要 |
PURPOSE: A flat sheet pile manufacturing method is provided to obtain joint strength enough for bearing the power of waves in a coffer dam construction. CONSTITUTION: A flat sheet pile manufacturing method comprises a first rolling step(10) for extending the web(a) of a rolled material(1) in the longitudinal direction, a second rolling step(20) for rolling the firstly rolled material to lengthen the upper flange(b) while shortening the lower flange(c), and a third rolling step(30) for gradually bending the secondly rolled upper flange through multiple rolling processes to form loop-type interlock parts(120) bent to opposite sides at both ends of the web, wherein the second and third rolling steps employ a close type two-stage rolling mill. |
