Abstract: A deep excavation project in Xuzhou is adjacent to a live subway and a station and has therefore restrictive requirements on the excavation support. This paper presents the key aspects of the excavation support design and selection. Both two and three-dimensional finite element simulations of the influence of the deep excavation process on the live subway operation and the station by using MIDA GTS commercial software. The results indicate that, the effect of the deep excavation on adjacent structures and utilities are within the allowable range. The feedback information from the numerical analysis results is used to provide excavation construction guidance. The construction monitoring results indicate that the monitored structure and utility deformation values are within the allowable range and the excavation support design effectively protected the safe operation of the adjacent subway and the station.

Key words: Deep Excavation, Excavation Support, Subway, Numerical Simulation, Monitoring