Abstract: Deep excavation monitoring is an important step in the foundation construction. The realtime and continuous deformation monitoring of the deep excavation can ensure the safety of the foundation construction and the safety of the temporary construction and surrounding utilities and buildings. Therefore, monitoring and deformation analysis of deep excavation and surrounding environment are necessary. This paper presents a case history of the deep excavation monitoring program for Suzhou Disability Activity Center Building project. The horizontal and vertical displacement of excavation supporting structure, supporting axial force, underground water level, deep horizontal displacement of soil and other items were monitored. The deformation process and monitoring results were analyzed in graphical forms. It was found that the change of each monitoring point was within the normal range. The data of each monitoring point did not exceed the alarm value, the deformation of the deep excavation support was stable, safe and reliable. The effect was satisfactory, which verified the reliability of the deep excavation supporting structure and the rationality of the monitoring program. It can ensure the safety of deep excavation and surrounding environment, improve the construction quality and minimize the safety hazards, and provide a useful reference for similar projects in this area.

Key words: Deep Excavation Monitoring, Deformation Monitoring, Displacement Monitoring, Axial Stress, Results and Analysis