Analytical Solutions of Steady a Seepage Field for Deep-Buried Tunnel with Grouting Ring Considering Anisotropic Flow

Difficulties related to seepage are frequently encountered in tunnel design and construction, especially in deep-buried tunnels. Nowadays, analytical solutions of steady seepage fields for deep-buried tunnel usually assume that the surrounding rock mass is homogeneous. In this study, analytical solutions of a steady seepage field for a deep-buried tunnel with grouting ring considering anisotropic flow are proposed. The proposed analytical solutions are verified by numerical simulations and parameter analysis are carried out. Results show that the seepage field of surrounding rocks around the deep buried circular tunnel is no longer uniformly distributed and presents elliptical distribution. The change of permeability coefficient of the lining structure has a great influence on the hydraulic head when the difference between permeability coefficient of lining structure and surrounding rock is not very large. The results show that the size of the grouting ring has more significant influence on the grouting effect.

Automated summary

Difficulties related to seepage in deep-buried tunnels are common in tunnel design and construction. Most solutions assume the surrounding rock mass is homogeneous, but this study proposes analytical solutions considering anisotropic flow with a grouting ring. The solutions are verified using numerical simulations and parameter analysis. Results show that the seepage field in deep-buried circular tunnels is non-uniform and elliptical, and the permeability coefficient of the lining structure significantly affects the hydraulic head. The size of the grouting ring also has a significant impact on the grouting effect.