溪洛渡水电站水垫塘水下检修技术探索

Underwater Maintenance Technology for the Plunge Pool in Xiluodu Hydropower Station

利用水下摄影与探摸、单波与多波束声呐及超短基线定位等多种技术,对溪洛渡水电站水垫塘过流面进行水下检查,结果表明,水垫塘整体良好,但局部存在缺陷。针对不同的缺陷类型,选用不同的修补材料和不同的施工工艺,进行水下修补。修补后,水垫塘结构的混凝土破损得到有效改善,底部排水廊道内渗水量明显减少。

Underwater inspection is conducted on the overflow surface of the plunge pool in Xiluodu Hydropower Station with various technologies such as underwater photography and exploration,single-beam and multi-beam sonar,and ultra-short baseline positioning.The results show that the overall condition of the plunge pool is good,but there are also some defects in certain areas.Based on the types of the defects,underwater maintenance is carried out with different repair materials and construction techniques.After the maintenance,the concrete damage of the plunge pool structure is effectively repaired.The seepage in the bottom drainage gallery is also significantly reduced.