大口径锚杆静压桩在基础加固改造中的设计与施工.pdf

施工技术 2011年11月上 88 CONSTRUCTION TECHNOLOGY 第40卷第352期 大口径锚杆静压桩在基础加固改造中的设计与施工 廖明进，金沐2，周运奎3，吴燕秋4，祝又霖5 (1.武汉科技大学理学院，湖北武汉430065；2.中铁港航局集团爆破工程公司，广东广州510660； 3.中原爆破工程有限公司，湖北武汉430061；4.广西华蓝设计（集团）有限公司，广西南宁530011； 5.武汉大筑建筑科技有限公司，湖北武汉430014) [摘要]华星时代广场因上部结构加层改造需对原柱基承台进行加固.考虑现场施工条件，加固设计方案决定采 用错杆静压桩方式加固原基础，且原柱基础局部承载力需提高近4倍，故选用400mmx400mm大口径锚杆静压桩. 经验算原桩基础的承台也需补强，加固设计采用混凝土井字梁式基础承台抬轿法，即扩大承台平面尺寸和加大承 台高度.最后介绍了桩基承台改造加固的施工工艺及质量控制措施. [关键词]桩基；承台；加固；锚杆静压桩；施工技术 [中图分类号]TU753.8;TU755.3 [文献标识码]A [文章编号]1002-8498(2011)21-0088-03 Design and Construction of Large Caliber Anchor Jacked Pile in Basement Reinforced Engineering Liao Mingjin' Jin Mu2 Zhou Yunkui' Wu Yanqiu' Zhu Youlin' (1.School of Science Wuhan University of Science and Technology Wuhan Hubei 430065.China; 2.China Railway Port and Blasting Project Engineering Co. Lid.Guangzhou Guangdong 510660 China; 3.Wuhan Zhongyuan Blasting Engineering Co.Ltd.Wuhan Hubei 430061 China; 4.Guangxi Hualan Design&Consulting Group Nanning Guangxi 530011 China; 5.Wuhan Dazhu Construction Technology Co.Ltd.Wuhan Hubei 430014 China) Abstract:The existing pile caps of Huaxing Times square need to be reinforced because of the storey- adding transformation scheme.Considered the site condition anchor jacked piles are adopted to strengthen the old basement.Because the load-carrying capacity of some existing piles has to be increased nearly four times so the big size of 400mm x 400mm caliber anchor jacked piles are used in the engineering.Based on calculation the existing ...