软土地基上海堤断面型式优化有限元研究

The optimized study of section pattern of the coastal levee on soft soil foundation with FEM

以软土地基上的海堤为研究对象,根据海堤结构与软土地基的相互作用特性,分析了堤坝结构型式对堤基变形的影响,并针对堤基存在的大变形和长期变形的问题,选择粘弹性模型和有限元技术,对断面型式进行了数值分析,并结合有限元强度折减系数法对堤坝的整体稳定性进行评价。工程实例验证了模型和计算方法的有效性,文中对软基下不同海堤断面型式进行了优化分析,所给出的结论可供同类工程借鉴。

Regard coastal levee on the soft soil foundation as the research object, according to the interaction characteristic of the structure of coastal levee and the soft soil foundation, the influence of structure pattern of coastal levee on the deformation of soft soil foundation was analyzed. Based on the problem of large deformation and the time - depended deformation of the foundation, section pattern was simulated by choosing the visooplasticity model and the finite element technology. Combined with the shear strength reduction with FEM, the stability of the coastal levee was analyzed. The validity of the model and computing technology was proved by a project instance. The differences of section patterns were optimized and the conclusions obtained in this paper can be used for reference of other engineering project.