<p>To effectively limit excavation pit deformation and minimize its impact on adjacent subway tunnel deformation, an active control measure utilizing servo-controlled steel supports is proposed, based on the Hangzhou New World Project. By analyzing field monitoring data, the deformation patterns of the tunnel were identified, and a three-dimensional numerical model was developed for validation. In addition, the influence of the magnitude and position of the axial force of servo-controlled steel supports on the tunnel deformation control was investigated. The mapping relationship between the axial force control parameters and the tunnel’s displacement field was systematically elucidated. The results indicated that servo-controlled steel supports played a significant role in reducing tunnel deformation. As the servo axial force increased, the control efficiency of horizontal displacement and tunnel settlement improved progressively, particularly near the excavation pit, where settlement control was notably enhanced. Moreover, the closer the servo-controlled steel supports were to the tunnel’s buried depth, the more effective the control of tunnel deformation. These findings provide important guidance for actively controlling tunnel deformation using servo-controlled steel supports and offer a valuable reference for applying this approach in practical engineering projects.</p>