Application of deep pressure grouting for earthing in the Qinshan Hydropower Station

The practice of the rehabilitation of the earthing network for the Qinshan Hydropower Station showed that the adoption of deep pressure grouting technology for earthing network is very effective to decrease the soil resistance ratio and to improve the earthing resistance of the local earthing network. Using such technology to rehabilitate earthing network has the advantages of low earthing resistance, strong scatteredcurrent capacity, stable earthing resistance, financial saving, safety and reliability. It can be popularized to similar hydropower stations.