Abstract：Through stress analysis in construction and service stages and based on the relevant interrelated codes and practical examples, the design principles and methods of pressured grout prestressed anti-floating anchor are studied. The related calculations are summarized: the bearing capacities of anchor, prestressed reinforcement and partial bearing pad in the service stage should be examined, and the bearing capacities in the construction stage are also examined. The cracking control principle and checking method at the top of anchor are put forward so as to provide references for designers. The problems about reinforcement ratio and cracking control, load effect in construction stage and strength of anchor body are discussed to summarize and improve the design of pressured grout prestressed anchor.
[1] 中华人民共和国国家标准编写组. GB 50010—2010混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2010. (The National Standards Compilation Group of People′s Republic of China. GB 50010—2010 Code for design of concrete structures[S]. Beijing: China Architecture and Building Press, 2010. (in Chinese)) [2] 中华人民共和国国家标准编写组. GB 50007—2011建筑地基基础设计规范[S]. 北京: 中国建筑工业出版社, 2011. (The National Standards Compilation Group of People′s Republic of China. GB 50007—2011 Code for design of building foundation[S]. Beijing: China Architecture and Building Press, 2011. (in Chinese)) [3] 中华人民共和国行业标准编写组. JGJ 94—2008建筑桩基技术规范[S]. 北京: 中国建筑工业出版社, 2008. (The Professional Standards Compilation Group of People′s Republic of China. JGJ 94—2008 Technical code for building pile foundations[S]. Beijing: China Architecture and Building Press, 2008. (in Chinese)) [4] 柳建国, 吴 平, 尹华刚, 等. 压力分散型抗浮锚杆技术及其工程应用[J]. 岩石力学与工程学报, 2005, 24(21): 3948-3953. (LIU Jian-guo, WU Ping, YIN Hua-gang, et al. Pressure-dispersive anti-float anchor technique and its application to engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(21): 3948-3953. (in Chinese))
