Bridge engineering handbook桥梁工程手册-61桥梁水力学.pdf

61 Bridge Hydraulics 61.1 Introduction Jim Springer 61.2 Bridge Hydrology and Hydraulics California Department Hydrology • Bridge Deck Drainage Design • Stage of Transportation Hydraulics Ke Zhou 61.3 Bridge Scour California Department Bridge Scour Analysis • Bridge Scour Calculation • of Transportation Bridge Scour Investigation and Prevention 61.1 Introduction This chapter presents bridge engineers basic concepts, methods, and procedures used in bridge hydraulic analysis and design. It involves hydrology study, hydraulic analysis, on-site drainage design, and bridge scour evaluation. Hydrology study for bridge design mainly deals with the properties, distribution, and circulation of water on and above the land surface. The primary objective is to determine either the peak discharge or the flood hydrograph, in some cases both, at the highway stream crossings. Hydraulic analysis provides essential methods to determine runoff discharges, water profiles, and velocity distribution. The on-site drainage design part of this chapter is presented with the basic procedures and references for bridge engineers to design bridge drainage. Bridge scour is a big part of this chapter. Bridge engineers are systematically introduced to concepts of various scour types, presented with procedures and methodology to calculate and evaluate bridge scour depths, provided with guidelines to conduct bridge scour investigation and to desi