一种新的组合坝型“桩基溢流坝”的设计探索

Exploration on design of a new combined dam type——pile-foundation overflow dam

针对一些流域河流暴雨突发性强、强度大、历时短,洪水陡涨陡落、冲击破坏力强的特点,有必要设计出一种新的更为安全适用、经济合理的实用坝型。经过工作实践中的不断探索、方案比选、研究计算后提出一种新的组合坝型"桩基溢流坝":即将混凝土灌注桩与WES实用堰结合作为基本坝型,坝后采用挑流消能方式,同时采用防洪工程中常用的铅丝石笼,作为防冲坑的铺垫材料护底,并在设计中控制好过坝单宽流量,使之能够很好地解决实际问题并且减小工程投资,满足水利工程建设任务的需要。

The pile-foundation overflow dam is to take the combination of both cast-in-place concrete pile and WES weir as the basic dam type with dam-rear trajectory bucket type energy dissipation mode and steel wire stone cage apron. In this way, the section of the overflow dam is small and no stilling pool is necessary to be arranged, thus not only the construction investment is saved, but also the functions, such as retaining, storage, discharging and energy dissipation, are satisfied.