Multi-Effects of Tunneling and Basement Excavation on Existing Pile Group

Tunnels and foundation pits are two separate types of excavation that frequently used in urban settings. Excavating tunnels sequentially around existing pile foundations is becoming more prevalent as underground space utilization rates increase. The deformation load transfer mechanisms the group under asymmetric conditions “first tunnel, then pit” pit, tunnel” studied from perspective relative positions tunnel–pile–foundation pit based on constant gravity model test 3D numerical simulation. result shows: settlement front (closer to tunnel) caused by condition pit-then relatively larger, while rear pit) tunnel-then larger. transverse tilting For pile, tip resistance generated excavation-then about 10% greater than it was before initial excavation, which pit”. 85% smaller multiple sequence “tunnel first-then leads a larger induced bending moment for whereas results tunnel”.