Deformation Analysis of Deep Buried Soft Rock Tunnel and Adaptive Control Measure of TBM Construction

This study focuses on the deformation mechanism of deep buried soft rock tunnel and adaptive prevention and control measures for TBM construction. For the case of large deformation in deep buried soft rock tunnel, the maximum resistance of support measures such as steel arches, anchor rods, and shotcrete is determined based on the support plan. Based on the determination of surrounding rock types, deformation monitoring data, and support resistance, the convergence constraint method is used to theoretically invert the mechanical parameters of deep buried soft rock, and combined with relevant standard parameter values for verification, reasonable mechanical parameters for deep buried soft rock are obtained. Based on the finite element method, open TBM excavation simulation is conducted for tunnel, and the mechanical response of surrounding rock is studied. The reasons for support structure failure are analyzed, and adaptive prevention and control measures for soft rock deformation are studied.