(中国中元国际工程有限公司, 北京 100089)

摘要: 海口双子塔⁃南塔超高层建筑采用桩⁃筏基础,其上部结构传力复杂、水平及竖向荷载大、内筒与外框地基差异变形及群桩效应明显,基础设计难度大. 分析研究了桩⁃筏基础设计中单桩承载力特征值取值、超高层塔楼核心筒与巨柱间的差异沉降控制、水平荷载影响等关键问题,总结了巨型外框⁃核心筒超高层结构桩⁃筏基础的设计要点. 基于承载力及变形控制要求比选了 3 种不同的基础设计方案,结果表明采用变刚度调平设计方法有效地减少了不同区域的差异沉降,桩身承载力满足要求,经济指标更优.

关键词: 海口双子塔; 超高层建筑; 差异沉降; 桩⁃筏基础; 变刚度调平设计方法; 桩⁃土共同作用

中图分类号:TU398. 7 文献标志码:A 文章编号:1002⁃848X(2022)16⁃0026⁃06

DOI:10. 19701 / j. jzjg. ZJ200034

Design and study on pile⁃raft foundation design of Haikou Twin Towers⁃South Tower

WANG Ning, ZHANG Tongyi, XIAO Ziqiang, ZHANG Song, FU Yangqiang, ZHANG Te

(China IPPR International Engineering Co. , Ltd. , Beijing 100089, China)

Abstract: The super high⁃rise building of Haikou Twin Towers⁃South Tower adopts the pile⁃raft foundation. There iscomplex force transfer of the superstructure of the tower, large horizontal and vertical loads, the differential deformationbetween inner corewall and outer frame foundations and obvious pile group effect, which leads to the difficulty in thefoundation design. Some key issues in the design of pile⁃raft foundation were analyzed and studied including the eigenvaluevalue of single pile bearing capacity, the differential settlement control between the corewall and giant columns of the superhigh⁃rise tower, the influence of horizontal loads, and the design points were summarized for the pile⁃raft foundation of thesuper high⁃rise structure with giant outer frame⁃corewall. Based on the requirements of bearing capacity and deformationcontrol, three different foundation design schemes were compared and selected. The results show that the variable stiffnessleveling design method can effectively reduce the differential settlement of different areas, the pile bearing capacity meetsthe requirements, and the economic index is better.

Keywords:Haikou Twin Towers; super high⁃rise building; differential settlement; pile⁃raft foundation; variable stiffnessleveling design method; pile⁃soil interaction

∗企业横向科研基金项目(S2019053T).

第一作者:王宁,硕士,教授级高级工程师,一级注册结构工程师,主要从事建筑结构设计工作,Email:wangning@ ippr. net.

[引用本文] 王宁,张同亿,肖自强,等. 海口双子塔⁃南塔桩⁃筏基础设计与研究[ J]. 建筑结构,2022,52(16):26⁃31,66. WANG Ning,ZHANG Tongyi,XIAO Ziqiang,et al. Design and study on pile⁃raft foundation design of Haikou TwinTowers⁃South Tower[J]. Building Structure,2022,52(16):26⁃31,66.