相连深基坑不同步开挖的基坑支护设计与实践

Design and Practice of Support for Asynchronous Excavation of Connected Deep Foundation Pits

文章以招商银行南京分行招银大厦项目为例,介绍软土地区两个相连深基坑不同步开挖的支护设计。为确保项目基坑开挖的安全,设计采取同时布置角撑和对撑,增加水平支撑冗余度等措施,解决了相连深基坑不同步开挖这一关键问题。实践结果表明,该方案是有效的,可为类似基坑工程设计、施工提供借鉴及参考。

Based on the project of Nanjing Branch of China Merchants Bank Building,the design of support for asynchronous excavation of two connected deep foundation pits is introduced.In order to ensure the safety of foundation pit excavation,the design adopts the measures of arranging angle braces and diagonal braces at the same time,increasing the horizontal support redundancy,etc.,to solve the key problem of synchronous excavation of deep foundation pits.The successful construction of the project can be used as a reference for the design and construction of similar foundation pits.