Research for the Influence of Ferris Wheel Deep Foundation Pit Excavation on Adjacent Existing Tunnel

The excavation of deep foundation pit could have a great impact on the adjacent existing structures. The proposed Ferris wheel is located in Jianghehui Block. The construction site is narrow and adjacent existing structures. In this paper, the finite element model was used to compare the influence of the underground separation wall protective measures on the deformation and internal force of adjacent existing tunnel. It was found that the foundation pit bottom presented a tendency of large deformation in the middle and small deformation on both sides. Based on the principle of soil-structure interaction, the optimization study of the underground separation wall was carried out, and it was found that the excessive thickness has little contribution to the reduction of lateral displacement.