Abstract: This paper presents a case history of a deep excavation for a residential building on the adjacent structures in Zhoukou area by considering the effect of the seepage and stress coupling. A numerical analysis model of the deep excavation was established by considering the precipitation data of the area as the boundary conditions. The measured values of the ground subsidence behind the supporting structure and the horizontal deflection of the cut-off wall were compared with the numerical results so that the reliability of the numerical model was validated. Based on the numerical analysis results, it was concluded that the deformation of the cut-off wall and the adjacent buildings are acceptable. The laboratory tested soil strength parameters under various precipitations were used in the numerical models so that the influence of the rainfall on the performance of the deep excavation supporting structures could be numerically investigated.

Key words: seepage-stress coupling effect, deep excavation, adjacent buildings, settlement, deformation