Arid
DOI10.1007/s10035-018-0824-z
Effect of sand and clay fouling on the shear strength of railway ballast for different ballast gradations
Danesh, Akbar; Palassi, Massoud; Mirghasemi, Ali Asghar
通讯作者Palassi, Massoud
来源期刊GRANULAR MATTER
ISSN1434-5021
EISSN1434-7636
出版年2018
卷号20期号:3
英文摘要

Ballast contamination by fine materials such as sand and clay in railway track at arid regions is an important issue that causes track instability problems and settlement due to reduction of shear strength of ballast. In this paper, the results of direct shear box test conducted on clean ballast, sand-fouled ballast and clay-fouled ballast for different ballast gradations are reported and discussed. For this purpose, three different fouling amounts according to fouling index are added to clean ballast. Test results show that by increasing the fouling percentage, the ballast shear strength always decreases both for sand and clay fouled ballast. However, the amount of shear strength reduction is low at high normal stresses. Clay contamination has more adverse effect on the shear strength of ballast compared with sand contamination. Also, the results of tests for evaluation of gradation effect on shear strength of fouled ballast which are conducted on various gradations according to American Railway Engineering and Maintenance-of-Way Association, show that the maximum particle size as well as uniformity coefficient affect the shear strength of ballast. Also, an empirical equation is presented to observe the effect of ballast gradation on reduction of shear strength with regard to amount of fouling material and normal stress.


英文关键词Ballast shear strength Fouling materials Ballast gradation Direct shear box test
类型Article
语种英语
国家Iran
收录类别SCI-E
WOS记录号WOS:000438722100001
WOS关键词CONFINING PRESSURE ; FOULED BALLAST ; BEHAVIOR ; COMPRESSION ; DEGRADATION ; TESTS
WOS类目Materials Science, Multidisciplinary ; Mechanics ; Physics, Applied
WOS研究方向Materials Science ; Mechanics ; Physics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209780
作者单位Univ Tehran, Coll Engn, Sch Civil Engn, Tehran, Iran
推荐引用方式
GB/T 7714
Danesh, Akbar,Palassi, Massoud,Mirghasemi, Ali Asghar. Effect of sand and clay fouling on the shear strength of railway ballast for different ballast gradations[J],2018,20(3).
APA Danesh, Akbar,Palassi, Massoud,&Mirghasemi, Ali Asghar.(2018).Effect of sand and clay fouling on the shear strength of railway ballast for different ballast gradations.GRANULAR MATTER,20(3).
MLA Danesh, Akbar,et al."Effect of sand and clay fouling on the shear strength of railway ballast for different ballast gradations".GRANULAR MATTER 20.3(2018).
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