For deep foundation pit nearby metro stations

the excavation scheme has significant influence on the deformation of foundation pit and construction safety. A deep foundation pit adjacent to metro tunnels in Shanghai is investigated as the research background. The foundation pit is divided into a big part and a small part in the design scheme. A feasible excavation scheme is proposed to excavate the big part firstly. This investigation is mainly performed to analyze the impacts of excavation sequences on the deformations of the retaining walls and tunnels. Centrifugal model tests are introduced to study the deformation behaviors of the retaining walls and tunnel structures. The analysis results show that excavating big part of the pit firstly is more reasonable to control the deformation of foundation pits. The conclusions have some instructions for designs and constructions of similar engineering.