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本文考虑了孔隙比与有效应力、孔隙比与渗透系数的非线性关系,建立了一维普遍大变形非线性固结方程,并详细讨论了初始条件及排水、不排水、半排水等边界条件对土体固结的影响.应用显式与隐式差分相结合的方法离散了该方程,以吹填土实验资料为依据,计算了初始固结时土体的非均匀性与土体边界孔隙比随过程变化这两种因素所组合的四种情况.结果表明,本文所建立的大变形计算模型是合理可行的,所建立的固结方程以及半排水情况下的计算式是正确的,可应用于实际工程计算.
In this paper, the nonlinear relationship between void ratio and effective stress, void ratio and permeability coefficient is considered, and a one-dimensional general nonlinear deformation equation with large deformation is established. The initial conditions and the boundary conditions of drainage, undrained and semi-drainage are discussed in detail. The influence of soil consolidation. The equation was discretized using a combination of explicit and implicit differences. Based on the experimental data of the fill soil, the inhomogeneity of the soil and the porosity of the boundary of the soil at the initial consolidation were calculated. There are four situations in which these two factors are combined with the process change. The results show that the large deformation calculation model established in this paper is reasonable and feasible, and the established consolidation equation and the calculation formula in the case of semi-drainage are correct and applicable. In actual engineering calculations.