Abstract: Based on a case history of a deep excavation supporting structure, the measured deformation data are compared and analyzed with the predicted values. The deformation pattern of the excavation supporting structure, the surrounding soils in the excavated area are obtained and the relationships between the numerical analysis predicted results and measured results are compared. The following conclusions are obtained: (1) The excavation speed and sequence of the excavated area is an important factor affecting the stability of the deep excavation, which must be carefully considered in the design and strictly followed in the construction. (2) For the area of the first excavation, the design and estimation of the large displacement part of the girders should be considered comprehensively. The theoretical prediction of the displacement should be modified, and the force can be estimated by the modified displacement, and then the design of the envelope structure is optimized. (3) There is a large difference between the distribution of the predicted maximum displacement and the measured maximum displacement near the bottom of the exavation.

Key words: Deep Excavation, Excavation Monitoring, Deformation Monitoring, Stress Monitoring, Soldier Piles Support