超大混凝土圆环内支撑在深基坑工程中的应用
摘要:以南京新城科技园国际研发总部园深基坑围护实例为背景,分析了直径超过200 m的超大混凝土圆环内支撑系统的工程应用特点,介绍了混凝土圆环内支撑结构设计、平面布置以及竖向承重结构的布置、圆环受力情况及配筋计算,并总结了深基坑超大圆环支撑设计的相关构造节点和关键技术要点。现场实测基坑位移较小,内支撑系统内力在可控范围内,整个施工过程达到了安全可靠的目标,对保护周边环境起到很好的作用,表明这些技术措施取得了良好的实施效果,希望为今后类似的深基坑工程围护设计与施工提供借鉴。
Abstract:Through a example of deep foundation pit of international R&D headquarters park in science and technology park of Nanjing new city, engineering application characteristics of super-large ring bracing system are analyzed, which diameter is more than 200 meter. The structure design, layout, vertical load-bearing structure, the force and reinforcement calculation of ring are also analyzed. The related structure node and the key technical points are summarized in the designation of super-large ring bracing system. In the site test,the displacement of excavation is small and internal force of bracing system is in the controllable range. The whole construction process is safe and reliable, and protects the surroundings nearby well. The results show that these measures achieve good implementation. It provide some suggestions for same type of deep foundation pit projects.
中文标题：
超大混凝土圆环内支撑在深基坑工程中的应用
Application of Super-Large Ring Concrete Bracing System In Deep Foundation Pit Engineering
作者：
赵升峰,范钦建
Zhao Shengfeng,Fan Qinjian
作者简介:赵升峰,1986年生,男,汉族,内蒙古呼和浩特人,助理工程师,从事岩土工程设计与咨询工作。E-mail:zhaoshengfeng510@163.com
通讯地址：
1. 江苏今迈工程勘察有限公司, 江苏南京 210019; 2. 南京工业大学交通学院, 江苏南京 210009
1.JiangsuJinmaiEngineeringInvestigationCo.,Ltd,Nanjing210019,Jiangsu,China; 2.CollegeofTransportationScience&EngineeringNanjingUniversityofTechnology,Nanjing210009,Jiangsu,China
中图分类号:TV551.4;TU942
doi:10.3969/j.issn.1007-2993.2013.01.005
出版物：岩土工程技术
收稿日期:2012-10-09
关键词:深基坑,超大圆环内支撑,关键技术
Key words:deep foundation pit,super-large ring bracing system,key technology
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