某排沙底孔结构除险加固

Risk Elimination and Reinforcement of Structure of Sand Sluicing Bottom Outlet

随着中国部分中小型水电站多年的运行,陆续出现了各种安全问题,为保证水库安全,需对各病险水库进行除险加固。文章以某水电站排沙底孔结构为例,针对排沙底孔外包钢筋混凝土开裂、露筋,采用有限单元法对原结构和加固结构进行了分析计算。最终确定在原有结构基础上采取加固措施的方法,为排沙底孔结构除险加固提供了一种可行的方案。

With operation of small mediate hydropower stations for a couple of years,various risks occur continuously. To secure the reservoir safety,reservoirs with risks need to be reinforced with risk elimination. One sand sluicing bottom outlet of a hydropower station is taken for example. Both the existing structure and the reinforcing structure are analyzed and calculated by application of finite element method regarding cracks and reinforcement exposure of the external reinforced concrete of the bottom outlet. Finally,the measures of the reinforcement on the existing structure are taken. It provides reinforcement with risk elimination of sand sluicing bottom outlet with a feasible scheme.