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NUMERICAL ANALYSIS OF THE LARGE DEFORMATION THEORY DURING DYNAMIC CONSOLIDATION ON SOILS BY THICK FILL
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摘要: 强夯过程中，夯坑周围土体存在局部大变形现象，用无限小变形假定将无法消除刚体位移的影响，必须采用大变形理论分析强夯加固机理。在强夯计算模型中，运用改进人工边界法来模拟波在人工边界上的传播。为了保证模型的网格稳定，计算程序中增加了液化单元分析。最后给出一个工程实例，验证了本文编制的大变形有限元程序。Abstract: There is a local large deformation in the peripheral foundation soil of the compacting spots,so the mechanical derivation of infinitesimal strain can't eliminate the effect of a rigid displacement,and the large deformation theory must be used to analyze the impact course of dynamic consolidation to foundation soil.The improved artificial boundary conditions are applied to simulate waves propagation at the boundary.Liquefaction element is used in the calculation program for ensuring the mesh stability of the model.Finally,an engineering example is discussed to verify the reliability of this model.
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