济宁运河发电厂地表水取水口物理模型试验研究

Model test of surface water intake of Jining Canal Power Plant

分析了山东济宁运河发电厂取水水源及河势稳定性资料 ,用移液管分析法测定了淤泥的级配曲线 ,利用相似原理建立了地表水取水口物理模型 ,研究了不同水流条件下取水口周围的水流结构及附近的冲淤情况。试验结果表明 ,在大水时 ,目前这种高大挡土墙直立形式的取水口建筑对河道水流流态引起的影响是明显的 ,不仅对取水口建筑本身不利 ,对取水口河段的河势稳定也不利。根据实验结果 ,对目前这种高大挡土墙直立的形式进行了改进 ,并提出了结构的优化方案。

The data of surface water source and riverbed stability of Jining Canal Power Plant were analyzed. The grading curve of silt was measured with pipet analysis method. The physical model of intake was established based on the similarity principle. Flow structure and siltation around intake under different flow conditions were researched in model test. The results showed that present intake structure,the retaining wall which form was large and erective, had an obvious effect on modes of flow in the riverway under big flow condition, and this was detrimental to intake structure and the stability of riverbed. According to the results, the form of retaining wall was improved and optimum design for intake structure was put forward.