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.