某水电站过水流道处理方法及应用效果检验

Treatment Method and Application Effect Inspection of Overflow Channel in a Hydropower Station

某水电站过水流道由导流建筑物改造而成,运行至今已有8 a。现场查勘发现底板及消能建筑物出现不同程度的损坏,消力池尾坎保持完好,洞身转弯段后浇筑底板均发生脱离损毁,初步分析同水流流态和新老混凝土结合面的连接程度有一定关系,因此,需对损毁处的底板进行修复,防止水流继续冲刷造成冲坑加深,根据分析,通过设置锚筋,并适当加厚混凝土底板可以满足安全稳定运行要求。

The water passage of a hydropower station was transformed from a diversion structure and has been in operation for 8 years.On site investigation revealed varying degrees of damage to the bottom plate and energy dissipation buildings.The tailgate of the stilling pool remains intact,and the bottom plate poured after the turning section of the tunnel body is detached and damaged.After preliminary analysis,there is a certain relationship between the water flow pattern and the degree of connection between the new and old concrete interface.Therefore,it is necessary to repair the damaged bottom plate to prevent the water flow from continuing to erode and deepen the erosion pit.According to the analysis,setting anchor bars and appropriately thickening the concrete bottom plate can meet the requirements of safe and stable operation.