干旱区生态环境知识资源中心(Arid): 戈壁地区高速铁路路基压实指标研究

Arid

	戈壁地区高速铁路路基压实指标研究
其他题名	Study of compaction indexes of high-speed railway subgrade of Gobi desert
	李鲲 1; 杨斌 2; 李肖伦 1; 赖国泉 3; 杨有海 3
来源期刊	铁道科学与工程学报
ISSN	1672-7029
出版年	2011
卷号	8 期号:3 页码:30-37
中文摘要	通过对兰新铁路第二双线路基试验段工程4个工点路基压实质量K_(30),E_(v2),E_(vd),孔隙率n 4项检测指标结果及相关性的分析表明:力学指标E_(vd)与K_(30),E_(v2)与K_(30)由于受填料种类、级配等的影响,其直接线性相关性较差,但E_(vd)与K_(30),E_(v2)与K_(30)可以用同一函数拟合,其间接相关性良好;由E_(v2)与K_(30)拟合函数分析表明,现行设计规范中所规定的E_(v2)与K_(30)标准不匹配,相比E_(v2)值,E_(v2)/E_(v1)更能反映路基的压实质量,提出戈壁地区高速铁路路基检测,基床以下路堤:E_(v2)≥60 MPa且E_(v2)/Ev1≤3.2;基床底层:E_(v2)≥80 MPa且E_(v2)/E_(v1)≤3;由物理指标压实度K和孔隙率n间的相关性分析表明,对于戈壁粗颗粒填料采用目前设计规范中所规定的孔隙率值来控制压实度是不合理的,与压实度K相对应的孔隙率n应针对具体的填料进行室内击实试验来确定。戈壁地区建议基床以下路堤:孔隙率n≤25%,基床底层孔隙率n≤23%。
英文摘要	Through compaction test of K_(30),E_(v2),E_(vd)and porosity n of the second double line of Lan-Xin railway subgrade test section,the results of four test and its correlation were analyzed.The analysis shows that:because of the various filler type,size distribution,the direct linear correlation of E_(vd)and K_(30),E_(v2)and K_(30)is poor.But the correlation between Evdand K_(30),E_(v2)and K_(30)can fitting by a special function,so their indirect correlation is better.It is showed that by the fitting function of E_(v2)and K_(30),standards between E_(v2)and K_(30)do not match each other,comparing with E_(v2),E_(v2)/E_(v1)can reflect the quality of subgrade compaction better.It is proposed that,highspeed railway subgrade testing in the desert area,in the following embankment subgrade:E_(v2)≥60 MPa and E_(v2)/E_(v1)≤3.2;Underlying subgrade:E_(v2)≥80 MPa and E_(v2)/E_(v1)≤3.It is not scientific that using uniform porosity to control the degree of compaction.The porosity n corresponding with compaction K,should determined by compac-tion test of specific filling materials.It is proposed in the Gobi region,the following embankment subgrade:n≤25%;Underlying subgrade:n≤23%.
中文关键词	高速铁路路基 ; 粗粒土 ; 压实检测 ; 相关性 ; 压实度
英文关键词	high-speed railway subgrade coarse grained-soil compaction detection correlation degree of compaction K
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CONSTRUCTION BUILDING TECHNOLOGY
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:4312048
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227154
作者单位	1.中铁第一勘察设计院集团地路处, 西安, 陕西 710000, 中国; 2.西南交通大学土木工程学院, 成都, 四川 610031, 中国; 3.兰州交通大学土木工程学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	李鲲,杨斌,李肖伦,等. 戈壁地区高速铁路路基压实指标研究[J],2011,8(3):30-37.
APA	李鲲,杨斌,李肖伦,赖国泉,&杨有海.(2011).戈壁地区高速铁路路基压实指标研究.铁道科学与工程学报,8(3),30-37.
MLA	李鲲,et al."戈壁地区高速铁路路基压实指标研究".铁道科学与工程学报 8.3(2011):30-37.