包頭恒通商廈地基基礎設計
魏 勇， 朱 鳴， 柯江華， 張 徐， 孫宏偉， 方云飛
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魏 勇， 朱 鳴， 柯江華， 張 徐， 孫宏偉， 方云飛（北京市建筑設計研究院有限公司，北京100045）[摘要] 包頭恒通三鹿綜合商廈采用梁板式筏形基礎?；A面積較大，塔樓和裙房之間荷載分布不均勻。塔樓區(qū)域采用CFG樁復合地基，裙房區(qū)域采用天然地基，局部需要抗浮設計。差異變形控制是地基基礎設計中的主要問題。采用變剛度調(diào)平思想布置CFG樁復合地基。優(yōu)化了裙房抗浮設計，取消了抗拔樁，節(jié)省了工程造價，減小了差異沉降。采用Plaxis 3D Foundation專業(yè)軟件進行考慮土．結(jié)構(gòu)共同作用的基礎沉降有限元分析。計算結(jié)果表明，總沉降變形量和差異沉降均滿足規(guī)范要求。[關鍵詞] 梁板式筏形基礎；CFG樁復合地基；抗浮設計；差異沉降；變剛度調(diào)平中圖分類號：TU473.2 文獻標識碼：A 文章編號：1002-848X(2012) S2-0488-04Foundation design of Baotou Hengtong buildingWei Yong, Zhu Ming, Ke Jianghua, Zhang Xu, Sun Hongwei, Fang Yunfei( Beijing Institute of Architectural Design, Beijing 100045, China)Abstract: Beam-and-slab raft foundation was adopted in the foundation of Baotou Hengtong building. The base area is large, and the load distribution between the towers and the podium is not uniform. The CFG( cement-flyash-gravel pile) composite foundation is used in the tower region, the natural foundation is used in the podium region, some local area needs anti-floating design. Differential settlement control is the main problem in the foundation design. The CFG piles are arranged according to the variable rigidity conception. The podium anti-floating design is optimized by abolishing the uplift piles, wluch can save the construction cost and reduce the differential settlement. The finite element calculation on the foundation settlement is carried out by using Plaxis 3D Foundation software. The results considering soil-structure interaction, which shows that the settlement and differential settlement of the foundation were controlled to satisfy the requirement of Chinese design code.Keywords: beam-and-slab raft foundation; CFC(cement-flyash-gravel pile) composite foundation; anti-floating design; differential settlement; variable rigidity design
