黄土路基加州承载比与回弹模量关系的研究

发布时间：2018-08-04 15:09

【摘要】：为了研究山西地区黄土地区路基加州承载比CBR和路基回弹模量E0之间的关系,本文首先通过对山西9种典型土样进行液塑限、比重及颗粒分析等物理性质试验,得出了山西黄土地区土质为级配不良土且以粉土为主。再此基础上选取山西3个典型路段(山平高速试验路段、广源高速试验路段、河运高速试验路段)进行现场CBR和回弹模量试验,对结果进行归纳研究,得到山西典型黄土地区E0、CBR、压实度K和含水率w之间的关系。最后通过室内试验分析了黄土成分、含水率、浸水时间和成型方式对CBR的影响,得出回弹模量、浸水CBR和不浸水CBR都是随着黄土密实程度的提高而提高;在一定水分含量条件下,回弹模量是随着水分含量的提高而降低;在击实成型条件下,干燥CBR随着含水率的提高而降低,浸水CBR随着含水率的提高,先减小后升高;在静压成型实验中,浸水CBR是根据水分含量的提高先降低后升高。
[Abstract]:In order to study the relationship between the California bearing ratio (CBR) of roadbed and the modulus of resilience (E0) of roadbed in loess region of Shanxi Province, the physical properties of nine typical soil samples in Shanxi Province, such as liquid-plastic limit, specific gravity and particle analysis, are tested in this paper. It is concluded that the soil quality of Shanxi loess area is poor gradation and silt is the main soil. On this basis, three typical sections of Shanxi Province (Shanping High Speed Test Section, Guangyuan High-Speed Test Section, River High-speed Test Section) were selected to carry out field CBR and resilient modulus tests, and the results were summarized and studied. The relationships among CBR, compactness K and water content w in typical loess area of Shanxi Province are obtained. Finally, the effects of loess composition, moisture content, soaking time and forming method on CBR are analyzed. The results show that the modulus of springback, soaking CBR and non-soaking CBR all increase with the increase of loess compactness. Under certain moisture content, the springback modulus decreases with the increase of moisture content, while the dry CBR decreases with the increase of moisture content, and the CBR decreases with the increase of moisture content, and then increases with the increase of moisture content. In the experiment of hydrostatic molding, the content of CBR decreased firstly and then increased according to the increase of water content.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.1

【参考文献】

相关期刊论文 前10条

1 刘福臣;对粉土定名的商榷[J];岩土工程技术;1999年01期

2 王旭东,郭大进;落锤式弯沉仪模量反算的可靠性研究[J];中国公路学报;1999年03期

3 赵明华;张常耀;肖鹤松;;路基土回弹模量E_0和野外承载比CBR研究[J];湖南大学学报(自然科学版);1993年05期

4 张贵珍,陈福;铁道部现行击实试验标准存在的问题及修订意见[J];铁道建筑技术;2001年05期

5 杨永红,王选仓,韩国杰,常学亮;甘肃黄土地区土基回弹模量[J];长安大学学报(自然科学版);2005年03期

6 龙卫东;;土基回弹模量的测试方法及其相关性[J];湖南交通科技;2006年01期

7 凌建明;陈声凯;曹长伟;;路基土回弹模量影响因素分析[J];建筑材料学报;2007年04期

8 唐娴;;黄土填料的CBR值影响分析[J];华中科技大学学报(城市科学版);2009年03期

9 武红娟;徐伟;王选仓;;土基模量随季节变化规律及其数值的确定[J];工程地质学报;2008年01期

10 陈开圣;方琴;熊岚;彭小平;;室内模拟承载板法测定土基回弹模量的分析[J];公路交通科技(应用技术版);2009年01期

相关硕士学位论文 前1条

1 鲍远骥;公路土基回弹模量分析与研究[D];长安大学;2003年

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