Authors

Abstract

In this study, saline soil parameters were calibrated based on EDEM discrete element method, soil density, soil elastic modulus, soil shear modulus, soil particle size distribution and Poisson's ratio were determined. The Hertz-Mindlin with Johnson-Kendall-Roberts（JKR） model was used to simulate the characteristics of soil stress and strain of particles under external forces. The JKR contact parameter between saline soil particles was used as a test factor, and the soil accumulation angle was used as a test index to carry out the saline soil contact parameter calibration test. It was finally determined that an elastic recovery coefficient of 0.262, a static friction coefficient of 0.263, a dynamic friction coefficient of 0.234, and a JRK surface energy of 10.084 were the optimal combinations of contact parameters for saline soils.

Abstract in Chinese

本研究通过测定土壤密度、土壤弹性模量、土壤剪切模量、土壤粒径分布及泊松比。采用Hertz-Mindlin with JKR模型模拟颗粒在外力作用下的土壤应力与应变的特征。将盐碱土壤颗粒间的Hertz-Mindlin with JKR接触参数作为试验因素，以土壤堆积角作为试验指标，进行盐碱土壤接触参数标定试验。最终确定弹性恢复系数0.262、静摩擦系数0.263、动摩擦系数0.234、JRK表面能10.084为确定盐碱土壤的最优接触参数组合。