中文摘要：

通过1∶40水工整体模型试验,研究了大塅水库新建溢洪道的泄流能力、水流流态、压力特性、水面线及下泄水流的消能防冲效果等。试验发现溢流堰面出现了较大负压,通过对溢流堰、溢洪道进口段喇叭形边墙、泄槽过渡段、泄槽渐变段以及挑流鼻坎等体型参数的优化,提出了能基本满足设计综合要求的优化布置方案,其试验研究成果可供相关工程参考。

英文摘要：

A 1： 40 ratio hydraulic model experiment is carried out to investigate the discharge capacity,flow regime,pressure characteristics,water surface line profile and the energy dissipation and erosion prevention performance of the new spillway in the Daduan Reservoir. Large negative pressure is observed on the overflow weir surface. Then,optimizations are conducted on the shape of the spillway,such as the overflow weir,the flared sidewall of spillway intake,the transition section,and the flip bucket. A final layout scheme which meets the design requirements is obtained. It could be a useful reference for similar projects.