500 kV输电线路黄河大跨越塔基工程施工实践

Construction Practice of 550kV Power Transmission Line Long-span over Yellow River

摘要:

500 kV输电线路黄河大跨越塔基工程分地下和地上两大部分，集多种施工工艺方法于一体。重点阐述了钻孔桩施工，支撑系统的选择，高桩承台模板的支护，地脚螺栓的安放和大体积承台砼的浇注等施工关键工序、技术难点和重点的具体控制方法。

Abstract:

The tower foundation engineering for 500kV power transmission line long-span over Yellow River was constructed with several technologies gathering and consisted of underground part and above-ground part. The paper discussed the important construction procedure， technical difficulties and special control method of bored pile construction， supporting system selection， elevated pile cap template support， anchor bolt placing and large-volume bearing platform concreting.