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注浆加固区域土层具有非均质性和原位变异性,土层参数服从一定的分布规律。基于随机分形理论和物性参数关联的特点,构建非均质土层的物性参数随机分布模型。基于Delaunay方法将土层分形网格结点连接成三角形网格,利用三角形面积坐标插值方法实现土层分形网格中动态参数向注浆有限元网格的传递。应用精细化的流固耦合力学模型,考虑土体物性参数动态变化和浆液时变效应的影响进行注浆扩散模拟,分析土层物性参数动态变化规律,研究非均质土层中浆液扩散范围和结石体的真实形态。通过定义不规则结石体的物理力学参数,研究荷载作用下注浆加固地层的应力和变形分布特征。
The soil in grouting reinforcement area has heterogeneity and in situ variability, and the soil parameters follow a certain distribution rule. Based on the characteristics of the correlation between stochastic fractal theory and physical parameters, a stochastic distribution model of physical parameters of heterogeneous soil is established. Based on the Delaunay method, the fractal meshes of the soil layers are connected into a triangular grid, and the triangulation of the dynamic parameters in the fractal grid of the soil to the finite element grid of the grouting is realized by the triangular area coordinate interpolation method. The fluid-structure interaction mechanics model is used to simulate the dynamic change of soil physical parameters by considering the dynamic changes of soil physical parameters and the slurry time-varying effect, and to study the diffusion range of slurry in heterogeneous soil layers The real form of stone body. By defining the physical and mechanical parameters of irregular stones, the stress and deformation distribution characteristics of the grouted strata under loading are studied.