关键词: 面板堆石坝, 土工膜, 水下检查

Abstract: By use of single beam bathymetry, side scan sonar and ROV joint inspection technology, the geomembrane face of Nam Ou VI hydropower dam is inspected in detail, the overall situation of geomembrane face and the connection between geomembrane and toe slab are found out, the deformation of geomembrane such as bulge and pit as well as the position and extent of sundries are described, the actual operation of geomembrane is reflected, which provide reliable basis for safety evaluation and dam operation management.

Key words: face slab rock-fill dam, geomembrane, underwater inspection