岸边式溢洪道引渠导墙形态设计研究

Research on approach channel guide wall shape of bank-run spillway

结合工程实际和以往的经验,为解决老渡口水电站岸边式溢洪道引渠过流问题,通过一系列试验对常规的椭圆弧翼墙进行了优化设计。针对进口地形地质条件改变之后带来的新问题,依照因地制宜,因势利导的原则,采取扭曲型贴坡导墙,很好地消除了进口地形因洪水淘刷带来不利的影响。模型试验以及原型观测均表明这种导墙形式流态良好,对类似工程有一定的参考价值。

In order to improve the overflow of the bank - run spillway of Laodukou Hydropower Station, we optimized the conventional elliptical arc wall by series of model tests and considering practical situation of this project and previous engineering ex- perience. And we subsequently solved the new problems caused by the change of topographic and geologic conditions according to the principles of suiting measures to local conditions and made good use of the situation. The disadvantageous effect of flood rus- hing is well eliminated by the application of contorted and fitting - slope guide wall. Both of model test and prototype observation show that water flows smoothly in this type of guide wall pattern, which can provide references for similar projects.