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将具有衬砌的圆形隧道各影响因素简化为轴对称问题。考虑水-力耦合、外水压力作用及Hoek-Brown强度准则,求得交通隧道弹塑性非线性解析解。利用数值方法研究各参数对考虑水-力耦合非线性解的影响,分析结果表明:考虑水-力耦合时,应力场、位移场和塑性区半径均较不考虑耦合因素时大,因此隧道开挖时应充分考虑水-力耦合作用。实例分析表明:随着mi的增大,应力和塑性区半径均随之增加,塑性区半径与参数mi为非线性递增关系。
The factors of circular tunnel with lining are simplified to axisymmetric problems. Considering the water-mechanical coupling, the external water pressure and the Hoek-Brown strength criterion, the nonlinear elastic-plastic analytical solution of the traffic tunnel is obtained. The numerical results are used to study the influence of various parameters on considering the nonlinear solution of water-power coupling. The results show that the tunnel opening is larger than the coupling factor considering the stress field, displacement field and plastic zone radius, Digging should fully consider the water - force coupling. The case study shows that with the increase of mi, the radius of stress and plastic zone both increase, and the radius of plastic zone and the parameter mi increase nonlinearly.