تقييـــم الانجـــراف الموقعـــي حــول الدعامـــة الوســـطى لجســـر الكوفـــة

Abstract

In this research, the effect of local scour which is formed around the mid pier of Al-Kufa Bridge was studied, and the evaluation of this pier was focused. The particle size of the bed material of the river near the bridge was analyzed and the water level was measured, and the values of velocity of flow in March, April and May 2006, also the depth of scour around the mid pier are measured in this period. Many formulas are extracted to predict the scour depth in future around the pier; also a new empirical formula was obtained to predict the scour depth around the pier corresponding to the hydraulic conditions similar as the study region. The results of the scour depth from the empirical formula and the calculated were compared, and gave good results, where the  percentage of error was 2%.