Time-space Effect of Supporting Structure Deformation in Projects of Deep Foundation Pits

The deformation of the supporting structure in projects of deep foundation pits has a certain space-time effect.Against the research background of the deep foundation pit project in the transport hub project of Tianjin railway station,this paper establishes the wall excavation segment model on the basis of the field measured data,and then carries out a numerical value simulation analysis in different excavation sequences and by different excavation unit modes.The research results show that the deformation of diaphragm wall is not only dependent on the order of excavation,but also connected with the division of the excavation unit mode.In the same excavation sequence,the more the excavation units are,the smaller wall deformations will be.