若干拱网消能工与普通消力池工程实例的经济分析

Economic analysis of several arch net-floor stilling ponds and ordinary stilling basins

针对渠系建筑物涵闸下游水流特点,认为渠系建筑物涵闸下游可采用一种适合于低弗氏数消能的新型消能结构——拱网消力池,并对通辽西辽河灌区先锋支渠、孟家段干渠和太平河水库泄洪洞采用拱网消能的工程实例进行了分析。结果表明,与普通消力池相比,拱网消力池的池长可缩短50%以上,池深可减少约30%,且消能率可提高20%以上,比普通消能措施节省工程造价30%以上。

In consideration of the hydraulic characteristics of canal system structures,the arch net-floor stilling ponds were regarded to be suitable for many low water head hydraulic structures.Several engineering cases such as Xianfeng branch canal of Liaohe River,Mengjiaduan main canal,and Taiping River reservoir were analyzed.The results show that the length of the arch net-floor stilling ponds can be 50% of that of the ordinary stilling basins and the depth and engineering cost can decrease by more than 30% compared with those of the ordinary stilling basin.The rate of energy dissipation can increase by 20%.