流固耦合渗流模型在筒型基础沉贯中应用

根据筒型基础沉贯作用的特点，研究了适合筒型基础应用的渗流模型，并修正了物理参数动态模型．利用J2流动理论各向同性硬化原理，结合离散元方法，建立筒型基础土体本构关系．将本构关系引入到有效应力原理中，建立沉贯作用基本方程，改进沉贯阻力方程，根据质量守恒定律和流固耦合渗流运动方程来建立适合筒形基础沉贯作用特点的流固耦合渗流数学模型，并给出上述模型的定解条件．利用模型进行了实例计算，检验了模型的可用性和有效性．

Application of Fluid-Solid Coupling Seepage Analytical Model in Suction Penetration of Bucket Foundation

According to the characteristic of bucket foundation during suction penetration, a flow analytical model for bucket foundation was investigated, and the theoretical model of dynamic physical parameter was corrected. The constitutive relationship of bucket foundation was analyzed by the principle of J2 flow theory and isotropic based on a deformable distinct element method. Constitutive relationship was applied to the principle of effective stress, suction penetration equation was established, and then an improved penetration resistance equation was proposed. Fluid-solid coupling seepage analytical model of bucket foundation suction penetration was established by instantaneous law of conservation of mass and equation of fluid-solid coupled seepage. And solvable condition of aforementioned equation was derived. The feasibility and effectiveness of the model is validated by numerical simulation of the sample using the educed model.