中国铁道科学2011，Vol.32Issue(1)：7-11,5.
铁路路基戈壁土填料级配及压实特性分析
Analysis on the Grading and the Compaction Characteristics of the Gobi Soil Filling for Railway Subgrade
摘要
Abstract
The particle size analysis test, heavy compaction test, the vibrated compaction test and the field detection of the compaction quality K30 were carried out on the filling materials of each working site in the test section of a certain railway subgrade in Xingjiang Gobi area.The influences of such factors of Gobi soil as the particle composition, particle grading, the content of the coarse particle and the content of the fine particles on the compaction effect were analyzed.The analyses show that the filling materials in Xingjiang Gobi area mainly are uneven and discontinuous grading soil, and a large portion belongs to group B.The filling materials are of gap-graded coarse particle soils and change from fine to coarse from east to west.The content of 1～2 mm particle size is relatively low, which is one of the factors resulting in the poor grading of the filling materials.The contents of the coarse and fine particles in the filling materials have remarkable impact on the maximum dry density, and there is a good linear relationship between the dry density and the content of coarse particles or the content of the fine particles.The regression equation between the characteristic particle size of the particle grading and the maximum dry density was established by multiple linear regression analysis.The field inspection results of K30 in each working site were analyzed.The results show that the compaction effect is good when the grading of the filling materials is within Tailor ideal grading and the content of the coarse particles is 60％～70％.关键词
铁路/路基/戈壁土/填料/级配/干密度/级配特征函数/泰勒级配分类
交通工程引用本文复制引用
杨斌,赖国泉,杨有海,黄大维..铁路路基戈壁土填料级配及压实特性分析[J].中国铁道科学,2011,32(1):7-11,5.基金项目
铁道部科技研究开发计划项目(2009G020-C) （2009G020-C）
