灌注桩与高喷灌浆组合结构在桃源水电站中的应用

Application of Combined Filling Piles and High-pressure Jet Grouting Structure in Taoyuan Hydropower Station

桃源水电站船闸下引航道主导航墙基础水下施工混凝土量大、工期紧,且受沅江水位变幅大的影响无法施工。针对这一问题,改为钻孔灌注桩与高喷灌浆组合结构替代原基础,节省了基础开挖量,缩短了工期,工程质量也有了保证,为船闸如期通航创造了有利条件。介绍了钻孔灌注桩和高喷灌浆施工工艺。

The underwater foundation of downstream main approach channel wall of ship lock in Taoyuan Hydropower Station is constructed with a large amount of concrete and shorter construction duration, and as the large variation of water level of Yuanjiang River, the construction is severely affected. For completing the construction on time, the foundation structure scheme is replaced by the combination of filling piles and high-pressure jet grouting structure. The actual construction shows that new structure can decrease excavation volume, short construction duration and assure construction quality. The construction technologies of combined filling piles and high-pressure jet grouting structure are introduced.