叠合墙软土深基坑明挖顺作与盖挖逆作结合应用研究  

Study on the application of the bottom-up method and cover top-down method in deep foundation pits excavation of composite wall

作　　者：林之航[1] LIN Zhihang(Fuzhou Investigation and Surveying Institute,Fuzhou 350001)

机构地区：[1]福州市勘测院,福建福州350001

出　　处：《福建建筑》2020年第4期73-77,共5页Fujian Architecture & Construction

摘　　要：以紧邻现状建筑的大型软土深基坑支护为案例,探讨了叠合墙基坑明挖顺作法与盖挖逆作法的结合运用的优势、适用条件、关键点,详细剖析了组合运用的复杂工序合理安排、设计施工难点及具体解决对策。实践结果表明,该结合作法对软土深基坑开挖能充分发挥优势,既满足工程安全要求,又缩短工期,但要注重把控实际运用中的若干难点、关键点。Taking the support of a large soft soil deep foundation pit which is adjacent to the existing building as an example,the paper discussed the advantages,applicable conditions and key points of the bottom-up method and cover top-down method in deep foundation pits excavation of composite wall. And the reasonable arrangement of complex working procedure,design and construction difficulties and specific solutions were also analysed. The practice results show that this method can give full play to the advantages of soft soil deep foundation pit excavation,which not only meets the engineering safety requirements,but also shortens the construction period,but some difficulties and key points in practical application should pay more attentions.

关 键 词：软土深基坑 盖挖 顺作法 逆作法 地下连续墙 叠合墙 

分 类 号：TU47[建筑科学—结构工程]