本文结合北京房山广阳家园C、D项目结构设计,对大底盘、多塔楼建筑的结构设计进行了介绍,详细阐述了地下车库基础设计方法、抗拔桩设计要点及超长地下室处理措施,同时对上部结构设计过程中遇到的一些难点进行了详细介绍,给出了大跨度钢结构楼面的一些节点构造。最后介绍了使工程经济指标最合理应注意的一些问题。 Based on the structural design of C and D projects in Guangyang, Fangshan, Beijing, this paper introduces the structural design of large chassis and multi-tower buildings, and elaborates on the basic design methods of underground garage, the design points of anti-pull pile and the treatment of long basement. Some difficulties encountered in the design of the superstructure are introduced in detail, and some node structures of the large-span steel structure floor are given. At last, some problems which should be paid attention to make the economic indicators of the project most reasonable are introduced.