Abstract: This study investigates the coupled mechanical response of a super-high slope-deep excavation system in Huangpi District, Wuhan, using three-dimensional finite-element analysis to characterize stress redistribution and deformation evolution during staged excavation. Numerical results are compared with field monitoring data to evaluate the safety and reliability of the pile-anchor and pile-support system adopted for this project. Excavation-induced unloading alters the stress field of the adjacent slope, influencing its global stability, while the slope simultaneously imposes bias-pressure effects on the foundation pit. When the separation distance between the two is small, their deformation behaviors become strongly interactive: lateral displacement of the foundation pit exerts a pronounced traction effect on slope deformation. Engineering practice should therefore adhere to the principle of “stabilize the slope first, then strictly control foundation-pit deformation.” Project-wide monitoring and warning thresholds should be governed primarily by slope displacement criteria. Because the sidewall represents a rock-slope foundation-pit geological model, accurate investigation of rock mass structure, including weak interlayers and discontinuity orientations, is essential for both permanent and temporary support design. Qualitative geological assessment provides the fundamental basis for engineering judgment, while quantitative numerical analysis serves as a critical tool for comprehensive evaluation and design optimization.

Key words: Wuhan City, Slope Near Deep Excavation, Displacement, Finite Element Analysis