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引入弯曲度以及与孔隙率的关系,借用弯曲度概念改进了经典公式中可移动颗粒的具体运移路线的表示,去除渗流管涌经典计算公式中从大量实验数据统计获得的明兹形状系数,从物理意义上解释了可移动颗粒在土体单元中移动路径并不是与土体单元长度呈单调的线性关系,而是一个和孔隙率有关的参数。利用链索模型,将颗粒级配曲线与孔隙率联系起来,使得临界坡降比计算只需要利用颗粒级配曲线便可求得。改进后的公式与经典公式获得的临界坡降比随孔隙率变化的规律一致,利用实验数据经不同方法比较分析,验证了改进后的公式的有效性。改进后的公式仅需借助准确的颗粒筛分试验,且参数的物理意义更加明确。
Introducing the relationship between curvature and porosity, borrowing the concept of curvature to improve the representation of the specific migration path of the movable particles in the classical formula, and removing the Mintz shape coefficient obtained from a large amount of experimental data in the classic calculation formula of seepage pipe flow, from The physical meaning explains that the moving path of the movable particles in the soil unit is not a monotonous linear relationship with the length of the soil unit, but a porosity-related parameter. Using the link model, the particle gradation curve is linked to the porosity so that the critical gradient ratio calculation requires only the particle gradation curve. The results of the improved formula and the classical formula show that the critical slope-falling ratio is consistent with the change of porosity. The experimental data are compared and analyzed by different methods to verify the effectiveness of the improved formula. The improved formula only needs accurate particle screening test, and the physical meaning of the parameters is clearer.