昆明综合交通枢纽基坑内支撑设计优化分析研究  

Study on optimization analysis of foundation pit support designn of Kunming comprehensive transportation hub

作　　者：缪应璟 张廷安 胡贺祥 李焕军 徐中华[2] Miao Yingjing;Zhang Ting'an;Hu Hexiang;Li Huanjun;Xu Zhonghua(China Construction First Group Corporation Limited,Beijing 100161,China;East China Architectural Design and Research Institute Co.Ltd,Shanghai 200002,China)

机构地区：[1]中国建筑一局(集团)有限公司,北京100161 [2]华东建筑设计研究院有限公司,上海200002

出　　处：《建筑科学》2023年第9期162-170,共9页Building Science

基　　金：住房和城乡建设部科学技术计划项目(2022-S-010);中国建筑一局(集团)有限公司科技研发课题(CSCEC1B-2021-33)

摘　　要：以昆明综合交通国际枢纽建设项目基坑支护为背景,对内支撑设计优化设计进行分析研究.介绍了原基坑支护体系,并从施工、成本与基坑安全的角度分析了原设计存在的问题,然后在原支护体系的基础上提出多种思路分析其优缺点.通过施工角度分析模拟综合考虑多种因素,提出优化思路,选用了最终方案,采用7个较小圆环的设置,使得支撑梁的数量减少,支撑基本避让出塔楼结构范围,减少支撑与塔楼结构碰撞.支撑与裙楼结构碰撞概率也降到最低,较大程度上提升裙楼地下结构施工速度.最后在总结了优化过程的经验的基础上,提出了支撑设计优化思路.Taking the foundation pit support of the Kunming comprehensive transportation international hub construction project as the background,the optimization design of the internal support design is analyzed and researched.The original foundation pit support system is introduced,and the problems existing in the original design are analyzed from the perspectives of construction,cost and foundation pit safety.Then,based on the original support system,various ideas are proposed to analyze its advantages and disadvantages.Through the analysis and simulation of the construction angle,a variety of factors are considered,and the optimization idea is proposed.The final plan is selected,and the setting of 7 smaller rings is adopted to reduce the number of support beams,and the support basically avoids the scope of the tower structure,reducing the support and the tower structure collision.The collision probability between the support and the podium structure is also minimized,which greatly improves the construction speed of the podium underground structure.Finally,on the basis of summarizing the experience of the optimization process,the optimization idea of support design is proposed.

关 键 词：基坑 监测数据 软土 超高建筑 

分 类 号：TU476[建筑科学—结构工程]