深基坑分区施工对紧邻地铁结构变形影响与保护对策分析

Influence of Deep Foundation Pit Partition Construction on Deformation of Adjacent Subway Structure and Analysis of Protection Countermeasures

文章通过对某地下人防项目基坑施工期间紧邻的地铁结构变形影响分析表明:外部深基坑土方开挖期间对邻近的地铁结构变形影响较为明显,但在基于“分层分块、先撑后挖、及时封底”的开挖原则下,通过优化施工方案,可以有效控制地铁结构的最终变形量。

Through the analysis of the deformation impact of the adjacent subway structure during the construction of a certain underground civil air defense project foundation pit,it is shown that the excavation of external deep foundation pit earthwork has a significant impact on the deformation of the adjacent subway structure.However,under the excavation principle of"layering and blocking,first supporting and then excavating,and timely sealing",by optimizing the construction plan,the final deformation of the subway structure can be effectively controlled.