Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 1434-5021 |
EISSN | 1434-7636 |
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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