地铁车站基坑施工对运营明挖区间的影响分析

Analysis on the Influence of Excavation of Metro Station Foundation Pit on Open Excavated Running Tunnels

深基坑开挖会引起邻近地铁结构变形,影响地铁运营安全,因此在工程实施前应对基坑设计及施工方案对运营结构的影响进行有效的评估分析。以某城市一邻近既有运营地铁明挖区间的地铁车站基坑为研究对象,采用MIDAS-GTS有限元软件对基坑开挖进行模拟,分析了车站基坑施工对邻近既有地铁明挖区间的变形影响,并提出相应的措施降低影响,以满足运营要求。研究结果可指导本工程及类似工程实施。

The excavation of deep foundation pit will cause the deformation of adjacent metro structures and affect the safety of subway operation.Therefore,before the implementation of the project,the influence of foundation pit design and construction plan on the operation structure should be effectively evaluated and analyzed.This paper takes a city adjacent to the existing metro station excavation of subway interval as the research object,the excavation is simulated by the finite element software MIDAS-GTS,analyzes the foundation pit construction to adjacent existing the effect of deformation interval of open-cut subway,and put forward the corresponding control measures of reducing effect,in order to meet operational requirements.The results may guide the implementation of this project and similar projects.