Based on the actual condition of engineering

the finite element analysis software PLAXIS is adopted to simulate two different asymmetric excavation conditions of the foundation pit: (1) different excavation depth differences

(2) different excavation interface places. Based on study of practical engineering simulation

with the increase of the excavation depth difference

surface settlement on the two sides both increase; settlement value and effect range on the deep side are also larger than the shallow side. Meanwhile

there is a large diversity deformation of bottom heave on the interface; the deformation difference becomes obvious with the increase of excavation depth difference. With the interface movement to the shallow side

the bottom heave on the deep side tends to be stable; and the variation tendency of the bottom heave increases to the shallow side. Through research

there is a better understanding of characteristic and negative factor of stress and deformation on asymmetric excavation pit

which can guide the construction and control excavation depth difference and interface location of asymmetric excavation

then reduce the engineering risk.