Abstract: Shanghai is a rapidly growing city with densely distributed buildings, numerous underground utilities, and crisscross viaducts and tunnels in urban areas. With the great demand of the underground engineering development, the construction difficulty of the deep excavation is getting more and more demanding. The design and construction of the deep excavation supporting system under complex environments has changed from the conventional strength control to the deformation control. Based on the deep excavation project of a hotel located in the center of Shanghai, this paper introduces the entire process deformation control idea of the deep excavation supporting system by integrating investigation, design monitoring and construction under complex environmental conditions. In the investigation phase, accurately obtain design parameters. In the design phase, investigate surrounding environment in detail and adopt targeted support design method. In the construction stage, use effective dewatering schemes and dredging measures, timely adjust the construction scheme according to the monitoring data and control the deformation of the supporting system in the entire process to protect the surrounding environment. The results of the implementation and the monitoring show that the design and the entire implementation process achieved the expected goal, which can provide a reference for the similar deep excavation supporting system deformation control.

Key words: Deep Excavation, Underground Pass Way, Deformation Control, Artesian Water, Deep Excavation Monitoring