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基于弹塑性损伤理论,在考虑渗流体积力、损伤软化及残余强度的基础上,推导了渗流场作用下深埋海底隧道围岩应力、应变及位移的封闭解析解;并分析了有效孔隙率、损伤参数和支护阻力对围岩应力、应变及损伤区范围的影响。研究结果表明:随着有效孔隙率的增大,围岩应力、应变及损伤区范围均明显增大,尤其对残余损伤区范围影响最为明显;与不考虑渗流情况相比,考虑渗流时围岩应力、应变和损伤区范围均较大;随着损伤参数的增大和支护阻力的减小,损伤区范围逐渐增大;但与渗流相比,损伤参数对围岩应力、应变的影响明显较小。对于海底隧道的支护设计而言,适当考虑岩体损伤及渗流的影响,会更加接近于工程实际。
Based on the elasto-plastic damage theory, the closed analytical solution of stress, strain and displacement of surrounding rock in deep submarine tunnel under the action of seepage flow field is deduced considering the volume force, damage softening and residual strength of seepage flow. The effective porosity, Influence of Damage Parameters and Support Resistance on Surrounding Rock Stress, Strain and Damage Zone. The results show that with the increase of effective porosity, the stress and strain of surrounding rock and the range of damage zone are obviously increased, especially in the area of residual damage zone. Compared with the situation without seepage, The range of stress, strain and damage zone are all larger. With the increase of damage parameters and the decrease of support resistance, the range of damage zone increases gradually. However, compared with seepage flow, the damage parameters affect the stress and strain of surrounding rock significantly small. For undersea tunnel support design, proper consideration of rock mass damage and seepage effects will be closer to the actual project.