高速公路路基填料CBR试验值的研究

Research on CBR Experimental Value of Roadbed Padding in Expressway

结合在建高速公路研究了影响粘性土CBR值的主要因素。根据土样塑性指数相同,而CBR值差异很大的实验结果,从土体的颗粒组成、矿物成分等几方面研究了其对填料CBR值的影响。得出如下结论:影响CBR值的主要因素是土体中矿物类型及其含量的多少,其次为粘粒组颗粒曲线分布情况及粘粉比。粘粉比越大,CBR值越小。

Combined with a expressway being constructed, the main factors affecting Clay CBR value were studied. According to the result of the same soil plasticity index, but big difference between the experimental results and the soil particles, the influence of mineral composition and other aspects to CBR of the fill values is studied. It draw the conclusion that the main factors affecting CBR are the soil types and mineral content, and secondly the distribution curve of the clay particles and sticky powder ratio. Larger the sticky powder ratio, smaller the value of CBR.