惠州抽水蓄能电站高压灌浆施工技术

High-Pressure Grouting Technology for the Construction of Huizhou Pumped-Storage Power Station

惠州抽水蓄能电站引水水道隧洞混凝土衬砌设计为透水限裂结构。抵御内水压力、控制内水外逃的关键措施是高压灌浆,高压灌浆质量的好坏直接关系着水道施工的成败。在A厂引水水道充水过程中发生较大渗漏的情况下,对B厂引水水道灌浆参数进行了较大的调整,增加灌浆工程量。B厂水道充水完成后整个水道渗漏量仅为9 m3/h,取得了良好的效果。

The concrete lining of diversion tunnel in Huizhou Pumped-Storage Power Station is designed with the characteristics of permeable and anti-crack, and the high-pressure grouting to the tunnel is the key to withstand the internal water pressure and minimize water leakage. After the tunnel of Plant A appeared a large amount of leakage, the parameters for the tunnel grouting of Plant B were adjusted and the grouting volume was increased. The water-filling experiment shows that the leakage of tunnel in Plant B is only 9 m3 per hour after grouting improvement.