化学灌浆和柔性防渗技术在水电站大坝水下修补中的实践

Application of the Chemical Grouting and Flexible Seepage Prevention Techniques in the Underwater Repairing of Hydropower Dams

针对大坝水下防渗层的裂缝、伸缩缝止水撕裂漏水等隐患,经研究、探索与实践,防渗层裂缝采用水下化学灌浆,伸缩缝止水撕裂采用沿裂缝开槽,嵌入SR材料、粘贴盖片的柔性防渗方式修复。大量的实践表明,此法施工方便、成本低廉、工期较短、效果显著,是一种较为理想的修复方法。

Problems such as the cracks in the underwater anti-seepage layer and the leakage due to the tearing of the waterstop in expansion joints are commonly encountered in hydropower dams.Practice shows that the chemical grouting and flexible seepage prevention techniques are effective repairing methods for such problems,which are of certain advantages such as construction convenience,low cost,short construction period and effective performance.