加劲箍对大直径灌注桩钢筋笼的径向变形控制研究  

Research on Radial Deformation Control of Reinforcement Cage of Large-diameter Cast-in-place Pile by Stiffening Hoop

作　　者：朱晓璇 徐伟[2] 陈国祥 ZHU Xiaoxuan;XU Wei;CHEN Guoxiang(Shanghai Construction No.4(Group)Co.,Ltd.,Shanghai 201103,China;Department of Structural Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海建工四建集团有限公司,上海201103 [2]同济大学建筑工程系,上海200092

出　　处：《建筑施工》2019年第10期1927-1929,共3页Building Construction

摘　　要：采用加劲箍是控制大直径灌注桩钢筋笼径向变形的有效手段,规范中虽对加劲箍直径提出了范围要求,但对于如何根据不同钢筋笼选择加劲箍直径未给出明确意见。基于此,通过采用有限元软件GTS NX对大直径钢筋笼进行了对比计算,对增大加劲箍直径、减小加劲箍间距和增加三角内撑等不同的径向变形控制手段进行了对比分析,最后给出了直径1 m钢筋笼的不同直径加劲箍的适用范围,为大直径钢筋笼加劲箍的配置提供参考。The adoption of stiffening hoop is an effective approach to control the radial deformation of reinforcement cage of large diameter cast-in-place piles.Although the scope of stiffening hoop diameter is required in the code,there is no clear opinion on how to choose the diameter of stiffening hoop according to different reinforcement cages.Based on this,the finite element software GTS NX is used to compare and calculate the large diameter reinforcement cage.The different radial deformation control methods,such as increasing the diameter of stiffening hoop,reducing the spacing of stiffening hoop and increasing the triangular brace,are compared and analyzed.Finally,the applicable range of different diameter stiffening hoop for 1 m diameter reinforcement cage is given,which can provide a reference for the configuration of stiffening hoop of reinforcement cage.

关 键 词：大直径钢筋笼 径向变形控制 加劲箍 有限元模拟 

分 类 号：TU755.3[建筑科学—建筑技术科学]