Design Criteria for a New Weir Surface Repair Method Containing Shock Absorbing Cushions

Although a weir surface layer is subjected to shocks of the floods with particles of varies sizes, they are generally repaired by covering an abrasion-resistant layer. In the past, based on the knowledge that higher strength materials have higher abrasion resistances, many reports have focused on enhancing the strength of the repair materials. However, the occurrence of brittle fracture and peeling were also significantly increased. These resulted in an awkward situation that the need of repairing becomes more urgent even if the material properties have been greatly improved. In an attempt to break through the traditional methods, the major thrust of this paper is to propose criteria for designing a weir surface containing shock absorbing cushions, and a new method accordingly.. It was then confirmed by in situ tests that such criteria have the capability to lead the above-mentioned shocks to be absorbed. Due to the limited space of this paper, all related test layout and results will be presented on another paper.Copyright © 2011 by ASME