The method for determining the hydraulic dimensions of the bar screen compound type torrent intake with iron bar

摘要

In the most of cases, steel pipe ( #phi# =100mm) is used as the bar-screen materials of the Bar-Screen Compound Type Torrent Intake. However, instead of steel pipe, installed iron bar (#phi# =30mm) can reduce not only the effective length of the bar-screen but also the fall height of the weir. This paper shows the contrast of the hydraulic dimensions between steel pipe and iron bar under the same design conditions. Moreover, through the check on the strength of the bar-screen for boulder stones, the authors clarified that iron bar is more effective for torrent morphology., flow conditions and intake discharge.