岩溶区梁式桥大直径灌注桩后注浆技术研究  

Research on Large-diameter Cast-in-place Pile Post Grouting Technology for Beam Bridge in Karst Area

作　　者：童丹风 TONG Danfeng(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430040,Hubei,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040

出　　处：《工程技术研究》2024年第18期70-72,共3页Engineering and Technological Research

摘　　要：文章以深层岩溶区某桥梁工程钻孔灌注桩为研究对象,采用现场静载荷试验方法,对钻孔灌注桩承载特性进行分析。结果表明:采用后注浆技术能显著提高钻孔灌注桩单桩承载力,减小桩基沉降。桩端后注浆技术比桩侧注浆效果更好,岩溶区采用桩端后注浆技术,可显著缩短桩长,降低施工难度及施工成本。Taking the bored pile of a bridge project in deep karst area as the research object,the bearing characteristics of bored pile are analyzed by field static load test method.The results show that adopting post grouting technology can significantly improve the bearing capacity of single bored pile and reduce the settlement of pile foundation.The post grouting technology at the pile end is better than the gradual effect at the pile side.The use of post grouting technology at the pile end in karst area can significantly shorten the pile length,reduce the construction difficulty and construction cost.

关 键 词：灌注桩 后注浆技术 岩溶区 承载性能 

分 类 号：TU753.3[建筑科学—建筑技术科学]