Effect of Size on the Stability of Narrow Foundation Pits

The traditional design method for narrow foundation pits ignores size effects. Engineering practice shows that this is too conservative and causes large-scale waste. In study, with the help of ABAQUS finite element software, retaining-structure models in semi-infinite infinite elastic space are used to simulate mechanical performances pile-supported structures under different combinations excavation depth, retaining pile-embedded width. Furthermore, based on antioverturning stability theory circular slip theory, intrinsic relationship among these variables their effects analysed. Finally, restraint effect soil below pit bottom actual working conditions, critical width determined classify pits. Moreover, applicability existing codes discussed. These results can improve construction excavations, benefitting industry society general.