高敏感环境下紧邻运营航站楼的深基坑施工技术

Construction Technology of Deep Foundation Pit Adjacent to Airport Terminal in Operation Under High Sensitivity Environment

紧邻航站楼区进行深基坑施工,往往面临着场地狭小与不停航交通组织需求的矛盾,基坑变形控制和周边环境保护的难点。以上海虹桥机场T1航站楼交通中心项目为例,介绍了不停航状态下紧邻运营航站楼的深基坑施工技术,从基坑围护选型及布设优化、围护桩基新工艺、土体开挖以及周边重要管线的主被动保护等一系列技术措施,在确保基坑安全的同时,降低周边环境影响,满足机场航站楼正常运营需求,取得了很好的效果,为今后特殊环境及其需求下的深基坑施工提供了借鉴。

The construction of deep foundation pit adjacent to the airport terminal area often faces the contradiction between the narrow site and the demand of non-stop trafice organization,the iticulty of toundation pit deformation control and surrounding environmental protection.Taking the raffic center project of T1 terminal building of Shanghai Hongqiao Airport as an example,the construction technology of deep foundation pit adjacent to the terminal in operation is introduced from a serles of technical measures such as selection and layout optimizalion of foundation pit support,new technology of support pile foundation,soil excavation and active and passive protection of important surrunding pipeines,etc..in order to ensure the safely of foundation pit,reduce the impact on surrounding environment,and meet the requirements of the normal operation requirements of airport terminal.It achieves good effect and can provide a reference for the construction of deep foundation pit under the special environment and its requirement in the future.