大坝渗漏治理是水库大坝除险加固中一项非常重要的工作。水利水电工程复杂不良地质体和混凝土深层微细裂缝缺陷所引起的坝基和坝体渗漏问题,对水库大坝的力学和渗透稳定性极为不利,如何有效处理是工程界面临的重大技术难题之一。仅采用普通水泥、湿磨细水泥或超细水泥灌浆往往难以达到预期防渗补强加固要求,化学灌浆是一种更为有效的技术手段。长江科学院结合国家重大水利水电工程建设需求,针对以上技术难题,通过多年持续创新与突破,研发了CW系列高性能化学灌浆材料,开发了配套灌浆装备系统和精细控制工艺,由此形成水库大坝除险加固CW化学灌浆成套新技术。该技术已成功应用于国内外100余个重点水利水电工程,有效保障了工程安全运行和综合效益发挥,产生了巨大的社会、经济和生态效益。

Dam leakage treatment is a crucial work in the reinforcement of reservoir dam. The leakage problems caused by complex unfavorable geological bodies and concrete’s deep micro-cracks in water conservancy and hydropower projects are detrimental to the mechanical and seepage stability of reservoir dams. How to effectively deal with them still remains a huge problem in hydraulic engineering. Ordinary cement or ultra-fine cement grouting is often difficult to achieve the desired treatment effect, whereas chemical grouting appears a more effective technical approach. Under the background of some major national water conservancy and hydropower projects, Changjiang (Yangtze) River Scientific Research Institute has developed CW series high-performance chemical grouting materials and corresponding grouting equipment as well as fine control techniques over years of innovation, hence forming a complete set of novel chemical grouting technology for reservoir dam reinforcement. The technology has been applied to over 100 water conservancy and hydropower projects in China and abroad, which effectively ensures the safe operation and comprehensive benefits of projects, and produces huge social, economic and ecological benefits.