Abstract: Been in operation for some time, maintenance and renovation should be carried out for small hydropower stations. Combined with the renovation design of discharge gate at the fore bay of Zhangcun hydropower station, this paper introduced the process in aspects including schemes comparison, structure design and adoption of shrinkage-compensating concrete. Further, some considerations were advanced.

摘要： 小水电经过一定时段的运行后，需要对其进行必要的维修和改造。现以张村小水电站前池退水闸的改造设计为例，分别从改造方案比选、结构设计、采用补偿收缩混凝土来解决工程实际问题三方面介绍了整个改造过程的设计，同时提出了对小水电改造的思考。