橡胶坝在山区水库工程中的推广应用

Popularization and application of rubber dam in mountain area reservoir project

针对水库高供水设计保证率,以及水库所在山区河流暴涨暴落的特点,选择在溢流堰顶设橡胶坝,在保证水库自身行洪的同时,最大程度地增加水库有效蓄水量,并尽可能少的增加工程投资。针对堰顶平台这一特殊的溢流堰体型,通过水工模型试验,选取幂曲线连接,更接近水流特点,堰顶负压较小。溢流堰顶设橡胶坝泄洪的方法从技术经济上分析是可行的。

Rubber dam is set at the top of overflow weir in the view of high water supply design guarantee rate in the reservoir, and characteristic of river water level sudden rising and falling in mountain area reservoir. Own flood draw-off of the reservoir is guaranteed. Meanwhile, effective water storage of the reservoir is increased maximally, and the increased investment in the project is minimized as far as possible. Power curve connection is selected through hydraulic model test aiming at the platform at the top of the weir a special overflow weir shape, which is closer to water flow characteristics, and negative pressure at the top of the weir is small. The method of setting rubber dams at the top of overflow weir is feasible in the aspect of technical economy analysis.