Numerical Simulation Study on the Bearing Capacity of Segmental Lining in Shield Tunnels Reinforced with Steel Plates
To enhance the durability and safety of tunnel linings,this study employs numerical simulation methods to evaluate the effectiveness of steel plate reinforcement in mitigating damage and deformation of shield tunnel linings.Comparative analyses were conducted on the deformation and bearing capacity of both reinforced and unreinforced shield tunnel linings under different load ratios.The results indicate that:(1)the deformation of the reinforced lining structure is significantly suppressed under load,with vertical convergence and horizontal expansion reduced by 71.4%and 68.3%respectively,compared to the unreinforced lining at a load ratio of 0.6;(2)the reinforced lining demonstrates superior performance under various load ratios,particularly at a load ratio of 1.24,where the ultimate bearing capacity is increased by 24%and the ultimate deformation is reduced by approximately 30%;(3)detailed analysis of the failure process before and after reinforcement reveals that steel plate reinforcement is highly effective in controlling crack propagation and increasing the stiffness of the lining.
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