Abstract: There are lots of testacean aquatics attached to the underwater concrete surfaces of the spiral casing and draft tube in Shaxikou hydropower station.The underwater concrete was corroded seriously, which effected the operation safety of hydraulic structures. This article mainly introduced the investigation on the underwater concrete corrosion, described the basic characteristics of the testacean aquatics attached the concrete and expatiated on the primary cause of the corrosion.

摘要： 沙溪口水电站水下蜗壳及尾水管混凝土表面附着较多的贝壳类水生物, 水下混凝土侵蚀严重, 影响水工建筑物的安全运行。本文主要介绍了水下混凝土侵蚀调查情况, 描述了混凝土附着贝壳类水生物的基本特性, 对引起水下混凝土侵蚀的主要原因进行阐述分析。