Study On Zipingpu Reservoir Filling Abandoned Coal-Impermeable Construction Technology

Anti-leakage grouting is a kind of construction technique, which using to enhance the anti-leakage ability of foundation. It is grouting in line holes which have sensible distance. Making the grouting body in every hole connected into a concrete anti-leakage wall like a curtain. Using the wall cuts off the leakage of foundation. So it was named curtain grouting in engineering.The coaly-shale in the area of Zipping Pu Reservoir distributes having the following features: widely,at tandom and strong Dermeability,Taking with another ,the geological andition is complex.So the treatment of the base rock, the leakage routeway around the reservoir is very important. And curtain grouting technique is a common and important method to dealing with rock mass of water conservancy architecture engineering.This paper studied the anti-leakage processing engineering of Zipping hydropower station. Firstly, it introduces the grouting theory of purdah grouting technology, its character, principle and processing methods in Karst area. Secondly, based on the geological study at the Karst cavity of Zipingpu, this paper analysis its grouting technology index, such as the design of grouting hole, the grouting pressure, the length of grouting section, grouting material, ratio, the processing in special condition, the finish grouting standard and seal, the construction methods and its crafts flow. Thirdly, this paper studies the backfill methods and construction technology at the Zipingpu carst cavity. Finally, this paper carefully analysis the grouting material, also check and analysis theengineering effect.