摘要
针对铁路基床表层填料粒径较大,采用现行的试验仪器测试其渗透系数的试验结果离散性较大,必须适当增加渗透筒筒径以减少其离散性的问题,通过击实试验确定试样的最优含水率为6%,最大干密度为2.38g/cm3;采用单因素法分别用直径10cm、21cm以及30cm改进的渗透仪器对级配碎石进行渗透试验,试验结果表明,直径为30cm的渗透仪器测得的铁路基床表层填料的渗透系数离散性小。研究结果可为测定室内粗粒土渗透系数提供依据。
The railway subgrade filler particle size is large, and using the existing test instrument to test the permeability coefficients and the experimental results of discrete larger must be appropriate to increase the penetration cylinder diameter to reduce the discreteness. The compaction test to determine the water in the optimal sample rate is 6%, maximum dry density is 2.38g/cm^3.10 cm, 21 cm and 30 cm in diameter respectively, using single factor method, improved penetration instrument of graded broken stone of permeation experiments. The experimental results show that the 30 cm diameter penetration instrument measured surface layer of railway subgrade filler permeability coefficient of small discrete. The results can provide the basis for determining the permeability coefficient of coarse grained soil.
出处
《河北交通职业技术学院学报》
2016年第3期25-28,共4页
Journal of Hebei Jiaotong Vocational and Technical College
关键词
粗粒土
渗透系数
渗透仪器
最佳筒径
coarse grained soil
osmotic coefficient
osmotic apparatus
best tube diameter
