深基坑开挖对共用连续墙的既有车站结构内力影响的空间分析

城市地下工程活动中,在已有的地铁车站周围进行深基坑开挖问题是一项难度较高的工程。当基坑必须与既有车站共用一幅连续墙,并且开挖深度比既有车站更深时,工程难度更高。通过建立三维板壳有限元模型,分析该类基坑开挖对既有车站结构内力的影响,讨论了基坑开挖对既有车站共用墙体和车站内顶、中、底板的内力影响,得到了一些内力变化规律。

Spatial calculation analysis on internal forces of the existing metro stations having common walls with a deep pit excavation

During the construction of underground work in cities,it is a difficult project that the excavation of a pit is close to an existing metro station.When the pit has to use a common wall of the station as supporting structure and is deeper than the underground metro station,the project is more difficult.By three-dimension shell finite element,the influence of a pit excavation on the internal forces of an existing metro station was analyzed.For the common diaphragm walls of the existing metro station and the newly built pit,the variety of bending forces was discussed.And the internal force variety of the floors in the existing metro station was also discussed.