基于自适应接触算法,建立盾构机、土体、大堤三者相互作用三维非线性有限元模型,结合刚度迁移法对盾构机掘进过程进行仿真,详细模拟盾构机超挖、机身坡度、机身与土体的相互作用、注浆时空变化性质、开挖面泥水压力、拖车作用等施工因素。模拟结果在与试验段实测数据进行对比的基础上,预测了大堤在盾构机掘进过程中的沉降规律,为越江隧道施工过程中保障防洪大堤的安全提供参考。 Based on the adaptive contact algorithm, a three-dimensional nonlinear finite element model of the interaction between shield machine, soil mass and embankment is established, and the tunneling process of the shield machine is simulated with stiffness migration method. , The interaction between the fuselage and the soil, the nature of the time and space of the grouting, the pressure of the muddy water on the excavation face, the action of the trailer and other construction factors. The simulation results are compared with the measured data of the test section to predict the settlement law of the dike in the tunneling process and provide reference for the protection of the flood control dike during the construction of the tunnel.