Abstract: The case history of the monitoring of a metro station excavation supporting system in Wuhan is presented in this paper. The subsurface conditions, structural design, and the construction sequences for the station excavation are discussed. Throughout the monitoring data, the lateral deflection values of the soldier piles at different layers, axial forces in the inclined and vertical struts as well as ground subsidence values were compared with the analytical results. Factors that affecting the performance of the supporting system were evaluated. The results indicate that the stress and deformation of the supporting system are influenced by the dimensions of area to be excavated, construction conditions and embedment depths of soldier piles.

Key words: Deep Excavations, Support of Excavation System, Construction Monitoring, Model Study