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某大型水利枢纽工程中孔泄洪洞是由导流洞改建而成 ,因此 ,合理地选择出口消能工体型就显得相当重要。该消能工既要满足施工期间的导流要求 ,同时还要满足工程峻工后的泄洪要求 ,泄洪消能问题难度较大。该泄水建筑物原设计采用的“小挑坎—水垫塘”消能效果欠佳 ,水流经小挑坎挑射至水垫塘后 ,水垫塘内水流呈急流流态且顶冲尾坎激起涌浪达 2 6m之巨 ,水流溢出塘外。后经多种方案的试验研究 ,最终提出了一种体型简单、消能充分、施工方便的联合消能形式———“消力墩—T型墩—消能塘”。该消能工注意了各辅助消能工间的紧密配合 ,充分发挥其群体效应 ,成功地解决了该泄水建筑物的泄洪消能难题。
A large-scale water control project in the hole discharge hole is converted from diversion tunnel, therefore, a reasonable choice of export energy dissipator body size is quite important. The energy dissipater not only meets the diversion requirements during the construction period, but also meets the flood discharging requirements after the completion of the project. The problem of flood discharge and energy dissipation is more difficult. The original design of the spillway used “small Tkankan - plunge pool” energy-dissipating effect is poor, the water flow through the small Taka-Kan shot to the plunge pool, the plunge pool water flow was rapid flow and top Chongkui Chung Chung waves up to 2 6m giant, water overflow outside the pond. After a variety of programs after the pilot study, the final proposed a simple body shape, full energy dissipation, the construction of a joint form of energy dissipation - “Power Pier - T-pier - energy dissipation pond.” The energy dissipater paid close attention to the close cooperation among the auxiliary energy dissipators and gave full play to its colony effect, thus successfully solving the flood discharge and energy dissipation problems of the drainage structure.