ABSTRACT
Breaching of regulators results in potential threats like scouring, piping, and overtopping of the structures. An attempt has been made to assess the performance of a temporary barrage using boulders constructed on the breached portion of the brick masonry barrage during a heavy flood. The stability analysis was carried out on the temporary barrage using finite element code Plaxis 2D. It is revealed from the analysis that temporary barrage is inept to retain the water. Therefore, it is decided to strengthen the temporary barrage incorporating a row of geosynthetic sandbags concealing the temporary structure and providing sheet piles at upstream and/or downstream of the river to withstand the flood. The stability analysis performed for the strengthened barrage revealed that providing rows of geosynthetic sandbags in front of the temporary barrage and sheet piles both at upstream and downstream is effective in reducing uplift pressure and exit gradient, and thereby prevent any future scouring.
