Abstract: The Shenzhen Caiwuwei Excavation Support Project serves as a prototypical case that profoundly underscores the intricacies and challenges associated with the excavation support and the earthwork excavation in the proximity to subway tunnels. Given its strategic location overlying a subway tunnel, the project posed numerous technical challenges and safety concerns that required meticulous planning and execution. To overcome these obstacles, a comprehensive approach, leveraging advanced numerical analysis techniques to precisely forecast the stress and deformation states of the subway tunnel structure during the excavation process are implemented. These measures ensured that any potential impacts on the tunnel’s integrity and the operational safety were minimized, thereby guaranteeing the safety and controllability of the entire project. During the construction phase, a strictly adherence to the predefined plan was used, while continuously monitoring and adjusting the approach to ensure the optimal performance. The rigorous monitoring measures, including real-time data acquisition and analysis, to detect any potential deviations or issues promptly are implemented so that the corrective actions can be used swiftly and minimizing any adverse impacts on the project’s progress and safety. The successful implementation of the Caiwuwei Excavation Support Project not only validates the feasibility of our technical solutions and construction techniques but also establishes a new benchmark for similar engineering projects worldwide. It demonstrates the author’s capability in overcoming the unique challenges posed by the excavation over the subway tunnels and achieving harmonious coexistence between engineering safety and urban development. Moreover, the project offers invaluable insights into the design and execution of the future excavation support systems. It serves as a precious resource for the engineers and planners, providing practical guidance and lessons learned that can be applied to analogous.

Key words: Over Subway Tunnel, Excavation Support, Numerical Analysis