Abstract: A fault penetrates the dam foundation and connects reservoir at the upstream river bed. As the broken rock and poor performance of the fault and the lamprophyre underneath, argillization and softening may occur with long-term seepage of high-pressure water. This may form a seepage passage inside the dam body and cause cracks. To improve the resistance of seepage and deformation of the fault, compound grouting using cement+ chemical slurry was carried out. This paper introduced the grouting construction, for reference.

Key words: fault, cement+chemical slurry, compound grouting, hydropower station

摘要： 某水电站一断层贯穿坝基上下游，在河床上游与水库联系，且断层及下盘煌斑岩脉岩体破碎、性状差，在水库运行期长期高压水渗透作用下，可能发生逐渐软化、泥化现象，形成渗漏通道，导致坝体局部开裂。为了提高该断层的抗渗、抗变形能力等，在断层区域布置了水泥+化学浆液灌浆孔进行复合灌浆补强处理。介绍了灌浆施工技术及类似工程可以借鉴的工艺方法。

关键词: 断层, 水泥-化学浆液, 复合灌浆, 水电站