Abstract: With the highspeed of the economic development, the urban construction is more and more concentrated.Highrise building foundation pit excavation is bound to be affected by the surrounding complex environment, therefore selecting the reasonable foundation pit excavation scheme has a higher request in the surrounding complex environment.Based on the case of the foundation pit excavation, this paper quantitatively analysis the reasonable slope excavation scheme with the cars dynamic loads around the binary structure.The stepbystep excavation and stepbystep jump dig methods are simulated by setting the model of slope excavation, and it is concluded that the most beneficial to maintain the stability of foundation pit excavation method is stepbystep jump dig.

Key words: Excavation of foundation pit, Dynamic load, Slope stability, Dualisticl structure