干旱区生态环境知识资源中心(Arid): 干旱荒漠区天然砂砾路基填料压实特性分析

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	干旱荒漠区天然砂砾路基填料压实特性分析
其他题名	Analysis on Compaction Characteristics of Natural Gravel for Subgrade Filling in Arid Desert Region
	包卫星 1; 郭小龙 2; 杨万精 3
来源期刊	中国公路学报
ISSN	1001-7372
出版年	2017
卷号	30 期号:2 页码:18-24
中文摘要	为研究天然砂砾路基填料的振动压实特性,首先采用筛分法对干旱荒漠地区多条在建高速公路的天然砂砾路基填料进行颗粒组成分析,其次进行表面振动压实试验,采用湿土法分析含水量对天然砂砾干密度的影响,采用干土法分析含石量、级配特性和振动时间对天然砂砾压实效果的影响。基于不同粗颗粒组含量下的最大干密度结果,拟合了天然砂砾最大干密度与粗颗粒中各粒组含量之间的关系式,并利用粗颗粒粒组含量确定天然砂砾的最大干密度。研究结果表明:新疆干旱荒漠区天然砂砾路基填料为不均匀土,级配不良的主要原因为曲率系数较小,填料中细粒含量较少;天然砂砾的干密度随着含水量增大会有谷值与峰值,与黏性土的单峰值变化有明显区别;天然砂砾含石量对最大干密度有显著影响,其最大干密度随含石量的变化分为明显的3个阶段,当含石量为60%时,可以得到最大干密度的最大值;不同级配的天然砂砾的干密度对振动时间的敏感性有明显区别。
英文摘要	To investigate the vibration compaction characteristics of natural gravel for subgrade filling,firstly,the particle composition of natural gravel for subgrade filling in several expressways under construction in arid desert regions was analyzed by sieving method.Secondly, the surface vibration compaction test was performed,in which the effect of water content on the dry density of natural gravel was analyzed by using watering method and the influences of stone content,grading characteristics,and vibration time on the compaction effect of natural gravel by using water-reducing method.The relationship between the maximum dry density of natural gravel and the content of each particle in coarse particles was established based on formula fitting method using the maximum dry densities under different contents of coarse particles. Correspondently,the maximum dry density of natural gravel was determined by the content of each particle in coarse particles.The results show that natural gravel filling materials in arid desert region of Xinjiang are uneven soil;the main cause of poor grading is low coefficient of curvature,and small fine particle content in the filling.The dry density of natural gravel may present bottom value and peak value with the increase of water content,which is obviously different from the change process of single peak of cohesive soil.Maximum dry density is significantly affected by stone content of natural gravel and the process of maximum dry density changing with the stone content is divided into three obvious phases.When stone content is 60%, the maximum of maximum dry density can be obtained.The sensitivity of vibration time is obviously different in line with the dry density of different gradings of natural gravel.
中文关键词	道路工程 ; 压实特性 ; 振动压实 ; 天然砂砾 ; 含石量 ; 最大干密度
英文关键词	road engineering compaction characteristic vibration compaction natural gravel stone content maximum dry density
语种	中文
国家	中国
收录类别	CSCD
WOS类目	TRANSPORTATION
WOS研究方向	Transportation
CSCD记录号	CSCD:5934299
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237006
作者单位	1.交通运输部公路科学研究院, 北京 100088, 中国; 2.北京交通大学土木建筑工程学院, 北京 100044, 中国; 3.西安市城乡建设委员会, 西安, 陕西 710003, 中国
推荐引用方式 GB/T 7714	包卫星,郭小龙,杨万精. 干旱荒漠区天然砂砾路基填料压实特性分析[J],2017,30(2):18-24.
APA	包卫星,郭小龙,&杨万精.(2017).干旱荒漠区天然砂砾路基填料压实特性分析.中国公路学报,30(2),18-24.
MLA	包卫星,et al."干旱荒漠区天然砂砾路基填料压实特性分析".中国公路学报 30.2(2017):18-24.