后注浆桩在黄河大跨越输电工程中的应用研究

Application of Post Grouting Piles in Yellow River Large Span Transmission Engineering Project

介绍了输电线路工程大跨越基础后注浆设计计算的研究情况,以某大跨越工程的后注浆基础设计为对象,用优化手段达到降低造价,解决受地震液化、高桩悬臂等因素控制的难题。结果表明:后注浆技术应用到大跨越基础设计上,可节省基础材料量20%以上,经济效益巨大,并且在可靠性、抗腐蚀性、消除沉降附加应力等方面具有良好的效果,是未来大跨越桩基础设计的发展方向。

The research background of the design and development of post grouting piles in large span transmission engi-neering projects was introduced .According to the case study of a particular project with large span foundation ,optimiza-tion method was adopted to reduce cost , solve the problems caused by earthquake-induced liquefaction and high can-tilevers .The results indicate that by adopting post grouting piles ,20% cost of basic materials can be saved ,meanwhile post grouting piles excel in durability and anti-corrosion ,they can also eliminate the additional stress of the foundation settlement .These piles have a great prospect in the design of large span foundations .