Research on Prediction and Prevention of Nonuniform Deformation in Unsymmetrical Loading Tunnel

Due to the influence of topography, geological structure, and site construction, there are differences in the strength and stress distribution of the surrounding rocks in migrated tunnels and large nonuniform deformation, resulting in local damage to the tunnel support structure. Due to the serious nonuniform deformation and damage in the unsymmetrical loading tunnel, the support is difficult to meet the tunnel safety requirements by conventional support methods. Under regional geological conditions, the areas where large nonuniform deformations occur in unsymmetrical loading tunnels and their deformation characteristics tend to have certain regularity. Based on the previous research, this paper combines the nonuniform deformation damage engineering case of Zheng-Wan High-Speed Railway sandy shale unsymmetrical loading tunnel with theoretical analysis, normal cloud model, and BP neural network to investigate the mechanism of nonuniform deformation, influencing factors, deformation level evaluation and construction support optimization in unsymmetrical loading tunnel.