葛洲坝工程水工钢结构防腐蚀概述

介绍了葛洲坝所处的水环境介质、喷锌保护方案的技术要求以及第一、二期工程中钢结构防腐过程及保护效果,说明喷锌方案是成功的.侧重介绍用BW9300系列涂料解决了机组拦污栅的防腐,用环氧金刚砂解决了大型弧门面板底缘及底坎的冲蚀磨损,以及用YHR抗气蚀材料解决了船闸反弧门的气蚀问题.简析了二期工程预喷锌、铝失效的原因.对类似工程的防腐有借鉴参考作用.

Design on leakage treatment for Zhushuqiao concrete faced rockfill dam

The maximum height of Zhushuqiao concrete faced rockfill dam is 78 m. The leakage emerged soon after the reservoir impoundment and in July, 1997, the measured seepage discharge reached 2 500 L/s. The underwater color television inspection discovered the cave in and breakage of a number of concrete facing slabs, at lower position even forming cavities and the seepage prevention system of the dam had been seriously damaged. Before the flood season of 2000, the reservoir was emptied to checkup and carry out treatment to the seriously damaged position, mainly referring to slabs, joint water tight, bedding materials collapse etc. After treatment, the measured seepage discharge is only 10 L/s and this demonstrates that the seepage treatment is successful.