- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | CHEN Jing, GAO Rui, LIU Yangzepeng, ZHANG Ronglong, SHI Zhizheng. Influence of Various Fouling Materials on Geogrid-Reinforced Ballast Performance[J]. Journal of Southwest Jiaotong University, 2022, 57(1): 200-206. doi: 10.3969/j.issn.0258-2724.20200307
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Geogrid has been widely adopted in ballasted railways to improve the bearing capacity of ballast and its resistance to lateral deformation. The mechanical properties of geogrid-reinforced ballast aggregate are seriously affected by contaminants of coals falling from the moving hauls or clay fines from ballast layer and subgrade. A series of large-scale direct shear tests of geogrid-reinforced ballast under different normal pressures and various fouling levels were performed using the two common fouling substances of ballasted railway, i.e., clays and coals. The effects of the two fouling materials on the shear strength, peak friction angle, vertical dilatant displacement, and peak dilatant angle of the geogrid-reinforced ballast were compared and analyzed, and the mechanical mechanism that contributes to the different performances was also explored. The results showed that the presence of fouling materials decreases the shear strength and peak friction angle of geogrid-reinforced ballast, but reduces its vertical dilatant displacement and peak dilatant angle. Compared with that fouled by clay fines, the ballast fouled by coals exhibits a lower shear strength and peak friction angle, and a larger vertical dilatant displacement and peak dilatant angle, indicating increasingly adverse impacts on the mechanical performances of geogrid-reinforced ballast.
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CHEN Jing, GAO Rui, LIU Yangzepeng, ZHANG Ronglong, SHI Zhizheng. Influence of Various Fouling Materials on Geogrid-Reinforced Ballast Performance[J]. Journal of Southwest Jiaotong University, 2022, 57(1): 200-206. doi: 10.3969/j.issn.0258-2724.20200307
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