CFG桩复合地基变刚度调平设计与分析
摘要:北京国际文化硅谷园位于北京朝阳区，工程场区以粉质黏土、粉土与砂土交互沉积为主，且地下水水位较高。该工程纯地下车库区域因自重不满足抗浮要求，采取了抗浮桩措施，同时主楼地基承载力不足，采用了复合地基，形成主楼复合地基+纯地下抗浮桩的型式。需要考虑主楼与纯地下车库，以及主楼的核心筒与外框架柱之间的差异沉降。通过基于地基与结构相互作用的差异沉降变形计算分析，验证控制与协调不均匀沉降的工程措施，设计选择合理的CFG桩持力层，调整主楼CFG桩桩间距、褥垫层厚度而调整地基刚度，并依据差异沉降计算分析优化调整抗浮桩的布置范围，实现了变刚度调平设计。工程检验与沉降实测，验证了本工程地基变刚度调平差异沉降的地基设计方案的合理性。
Abstract:Beijing International Culture Silicon Valley Park is located in Chaoyang District, Beijing. The project area is mainly composed of silty clay, silty soil and sandy soil with high groundwater level. In this project the only-underground-building needs anti-floating piles. At the same time, due to large load of the main towers and insufficient foundation bearing capacity, the CFG composite foundation is adopted under the main towers. Thus, CFG composite foundation under the main towers and anti-floating piles under the only-underground-building are used in this project. The differential settlement between towers and only-underground-building and also the core tube and the outer frame column of the tower building is difficult to control. Through the calculation and analysis of differential settlement deformation based on the interaction between geotechnical foundation and structure, the engineering measures for controlling and coordinating differential settlement are verified. The measures include selecting reasonable bearing layer of CFG pile, adjusting the foundation stiffness by using different spacing of CFG piles and cushion thickness, and optimizing the anti-floating piles according to the geotechnical settlement deformation analysis. The variable stiffness between the towers and their skirt buildings as well as the core tube of the tower and the columns of the outer frame is realized. The design is verified by the engineering inspection and settlement measurement.
中文标题：
CFG桩复合地基变刚度调平设计与分析
Variable Stiffness Leveling Foundation Design and Analysis of CFG Composite Foundation
作者：
卢萍珍,齐微,孙宏伟,方云飞
Lu Pingzhen,Qi Wei,Sun Hongwei,Fang Yunfei
作者简介:卢萍珍，女，1982年生，汉族，山西霍州人，硕士研究生，高级工程师，注册土木工程师（岩土），主要从事地基基础设计与咨询分析相关工作。E-mail：lupingzhen@biad.com.cn
通讯地址：
北京市建筑设计研究院有限公司，北京 100045
BeijingInstituteofArchitectureDesignCo.,Ltd.,Beijing100045,China
中图分类号:TU 433
doi:10.3969/j.issn.1007-2993.2022.01.012
出版物：岩土工程技术
收稿日期:2021-05-24
刊出日期:2022-02-16
关键词:地基基础设计,CFG桩复合地基,抗浮桩,变刚度调平设计,协同分析
Key words:geotechnical foundation design,CFG composite foundation,anti-floating piles,optimized design of foundation stiffness to reduce differential settlement,interaction analysis
文档包含图片数量：图片(11)张
文档包含表格数量：表格(3)个
参考文献：
[1]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.
[2]孙宏伟. 岩土工程进展与实践案例汇编 [M]. 北京: 中国建筑工业出版社, 2016.
[3]方云飞, 孙宏伟, 杨 洁, 等. 北京银河搜候(SOHO)中心地基与基础设计分析[J]. 建筑结构,2013,43(17):140-143.
[4]JGJ 79—2012 建筑地基处理技术规范 [S]. 北京: 中国建筑工业出版社, 2012.
[5]闫明礼, 张东刚. CFG桩复合地基技术及工程实践 [M]. 北京: 中国水利水电出版社, 2001.
[6]周 宸,化建新,王 健. CFG桩的承载力特性试验研究[J]. 岩土工程技术,2016,(10):217-248.
[7]化建新,闫德刚,赵杰伟,等. 第七届全国岩土工程实录交流会特邀报告−地基处理综述及新进展[J]. 岩土工程技术,2015,(5):285-300.
[8]吴民利. 超薄褥垫层CFG桩复合地基设计与实践[J]. 勘察科学技术,2018,(2):23-27.
[9]郭密文,魏国堂,沈伊晔. 高层建筑大底盘基础下CFG桩复合地基变刚度设计[J]. 工程勘察,2010,(7):22-26.
[10]王 杨,詹永勤. 北京达美中心广场基础变刚度调平设计[J]. 建筑结构,2017,(7):62-66.
[11]DBJ 11—501—2009 北京地区建筑地基基础勘察设计规范(2016年版)[S]. 2017.
[12]卢萍珍,于东晖,方云飞,等. CFG桩复合地基增强体偏位影响分析[J]. 建筑结构,2014,(10):126-129.
[13]范崇民,王 超,邴宇峰. CFG桩复合地基的数值模拟分析[J]. 岩土工程技术,2013,(3):13-16.
[14]周 宸,李宝强,王 健. CFG桩复合地基沉降三维数值模拟研究[J]. 岩土工程技术,2015,(6):118-121.
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