Abstract: Due to the limitation of the existing spatial distribution of cities, it is inevitable to utilize the shield tunnels to cross through roads, bridges, and buildings. Especially, when a shielded tunnel passing through the pile foundations, some piles underneath the existing building might be removed, this might adversely impact the stability and integrity of the building foundations. A case study of a shield tunnel crossing the pile foundation of a highraised building in Shanghai is presented in this paper. The service loading state of the piles is analyzed through the numerical investigations. The load transfer mechanism of directly removing piles as well as different pile reinforcement schemes are also studied in this paper.

Key words: Shielded Tunnels, Under Crossing, Piled Foundations, Pile Cuttings, Reinforcement, Result Comparisons