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在黄土地区大(同)呼(和浩特)高速公路路堑边坡开展了土质特征试验研究,结果表明:在人为开挖影响下,路堑边坡土壤颗粒组成趋于粉砂化,土壤容重增加,土壤有机质含量处于极缺乏状态;相关性分析表明,土壤容重与土壤含水量和土壤有机质呈明显负相关,土壤含水量与土壤pH值和土壤有机质含量呈明显正相关;主成分分析表明,土壤容重、土壤含水量和土壤有机质含量是表征边坡土壤特性的重要指标,其贡献率为55.52%。
The results show that under the influence of artificial excavation, the soil particle composition of the cutting slope tends to be silted, the bulk density of the soil increases, Correlation analysis showed that soil bulk density was negatively correlated with soil moisture content and soil organic matter, and soil moisture content was positively correlated with soil pH value and soil organic matter content. Principal component analysis showed that soil bulk density , Soil moisture content and soil organic matter content are important indicators of slope soil characteristics, the contribution rate of 55.52%.