农用车辆运行后不同深度的土壤应力分析

Jun Guo, Enhui Sun, Yue Yang, Jun Lu
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引用次数: 0

摘要

在现代农业中,随着农业机械化的发展和广泛应用,土壤的机械压实问题日益严重,导致田间土壤退化。基于 Boussinesq 解法,推导出圆形载荷区域的土壤应力公式,并利用 MATLAB 模拟不同深度土壤的应力应变关系。结果表明,在相同荷载条件下,随着土壤深度的增加,土壤应力逐渐减小,其中 0.2 米深度处的应力变化最为显著。使用固结仪进行的土壤压缩实验表明,在 50-200 kPa 的荷载下,土壤空隙率迅速下降,400 kPa 之后下降速度减缓。当土壤空隙率下降到 0.2-0.4 时,土壤应力变化趋于稳定。理论公式与压缩实验数据的比较表明,随着土层厚度的增加和压力荷载的增大,土壤应力逐渐减小,验证了理论公式预测的线性关系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SOIL STRESS ANALYSIS AT DIFFERENT DEPTHS AFTER AGRICULTURAL VEHICLE OPERATION
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.
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