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中文摘要：
针对某越江隧道工程，基于刚度迁移法及自适应接触算法，建立了盾构机-土体-大堤三者相互作用的三维非线性有限元模型．通过对盾构机穿越大堤这一连续的复杂物理力学过程作等效力学离散，提出了盾构机机身坡度、盾构机超挖、注浆时空效应、拖车作用等施工因素的数值模拟方法．通过将计算结果与试验段实测数据对比验证，预测了盾构机过大堤时对大堤的影响关系．同时，对该盾构法施工有限元模型在SMP与DMP并行计算平台下的并行计算效率、加速比进行对比分析，结果表明，迭代法并行计算效率远大于直接解法，DMP并行平台计算效率大于SMP并行平台．
英文摘要：
Based on a river-crossing tunnel project, a three dimensional nonlinear FE model which includes the interactions between shield tunneling machine, soil and flood levee was established with stiffness transferring method and adaptive contact algorithm. Based on the assumption that the continuous steady-state of tunneling process could be treated as step by step advancing process, methods were proposed to simulate the taper of shield skin, over-cut of shield machine, time dependence of grout materials, back-up trailer loading etc. The simulation results were first validated by comparison with field measurements from test section, and then, the settlements of flood levee were predicted. The SMP and DMP parallel architectures were employed to investigate the impact of parallel architectures and parallel numerical methods on calculation efficiency, speedup ratio of the established numerical model. It was found that iterative methods are faster than direct method and DMP is better than SMP with same CPU numbers.
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