超大基坑及底板分块施工部署及专项技术

Construction Arrangement and Special Technology of Super-Large Foundation Pit and Floor

在超大基坑施工中,围护结构变形往往会同时受到基坑分区和施工顺序的影响,因而在各类基坑工程应用中,基坑分区和分隔墙位置的设计应避免由于超大基坑土体应力场变化造成围护结构变形过量甚至损害的情况。通过合理设置分隔型基坑群和土方开挖顺序,能够有效优化分隔区段内支护结构,显著减少围护结构和周边环境变形,形成更稳定的基坑开挖和底板施工环境。

In the construction of super-large foundation pit,the deformation of retaining structure is often affected by foundation pit zoning and construction sequence at the same time,so in the application of all kinds of foundation pit engineering,the design of foundation pit zoning and partition wall location should avoid excessive deformation or even damage caused by the change of soil stress field of super-large foundation pit.Through the reasonable setting of separated foundation pit group and earthwork excavation sequence,the supporting structure in the separated section can be effectively optimized,the deformation of retaining structure and surrounding environment can be significantly reduced,and a more stable foundation pit excavation and floor construction environment can be formed.