Authors

Abstract

In modern agriculture, with the development and widespread use of agricultural mechanization, mechanical compaction of soils has become a growing problem, resulting in soil degradation in the field. Based on the Boussinesq solution, the soil stress formula for the circular load area is derived, and MATLAB is used to simulate the stress-strain relationship of the soil at different depths. The results show that under the same load conditions, as the soil depth increases, the soil stress gradually decreases, with the most significant stress change occurring at 0.2 m depth. Soil compression experiments conducted using a consolidation instrument revealed that the soil void ratio dropped rapidly under loading of 50-200 kPa, and the decline slowed after 400 kPa. When the soil void ratio decreases to 0.2-0.4, the soil stress changes tend to stabilize. Comparison between the theoretical formula and the compression experimental data indicates that the soil stress gradually decreases as the thickness of the soil layer increases and the pressure load increases, verifying the linear relationship predicted by the theoretical formula.

Abstract in Chinese

在现代农业中，随着农业机械化的发展和广泛使用，土壤的机械压实已成为一个日益严重的问题，导致田间土壤退化。基于Boussinesq解推导了圆形荷载面积的土壤应力公式，利用MATLAB模拟土壤不同深度的应力-应变, 结果表明: 相同载荷条件下，土壤深度增加，土壤应力逐渐减小，在0.2m处应力变化最大。通过固结仪进行土壤压缩实验，结果表明：土壤孔隙比在50-200kPa的加载下迅速下降，在400kPa后下降速度减缓。当土壤孔隙比降低到0.2-0.4，土壤的应力变化趋于稳定。通过理论公式与压缩实验数据对比结果表明：土壤应力随土层厚度增加以及压力载荷增加逐渐减小，验证理论公式的线性关系。