Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under Construction
In the transition zone of railway tracks, track irregularities occur frequently due to differential settlement, which arises from the difference between the vertical supporting stiffness of the abutment and the backfill. This is disadvantageous because it increases the maintenance requirements and d...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/17/8861 |
| _version_ | 1797496203540168704 |
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| author | Seongyong Park Dae Sang Kim Ungjin Kim Sangseom Jeong |
| author_facet | Seongyong Park Dae Sang Kim Ungjin Kim Sangseom Jeong |
| author_sort | Seongyong Park |
| collection | DOAJ |
| description | In the transition zone of railway tracks, track irregularities occur frequently due to differential settlement, which arises from the difference between the vertical supporting stiffness of the abutment and the backfill. This is disadvantageous because it increases the maintenance requirements and deteriorates the ride quality. To address this challenge, this study proposes a strategy involving the application of cement-treated gravel reinforced with geogrids and rigid facing walls. The reinforced subgrade for railways (RSR), which can reduce residual settlement through the initial construction of the backfill reinforced with geogrids and the subsequent development of the rigid facing wall, was constructed at the transition zone with cement-treated gravel as the backfill material. The long-term behaviors during and after construction on the RSR for a period of 16 months were evaluated by analyzing the surface and ground settlements, horizontal earth pressure, and geogrid strain. The minor net settlement of the reinforced backfill converges at the early stage of subgrade construction, and the horizontal earth pressure was approximately reduced to the level of 54–63% of the Rankine active earth pressure. |
| first_indexed | 2024-03-10T03:00:19Z |
| format | Article |
| id | doaj.art-ebd3fe3734874cadb8e06f2ae54d151d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:00:19Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-ebd3fe3734874cadb8e06f2ae54d151d2023-11-23T12:48:10ZengMDPI AGApplied Sciences2076-34172022-09-011217886110.3390/app12178861Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under ConstructionSeongyong Park0Dae Sang Kim1Ungjin Kim2Sangseom Jeong3Hanwha Engineering and Construction, Seoul 04541, KoreaAdvanced Railroad Civil Engineering Division, Korea Railroad Research Institute, #176 Railroad Museum St., Uiwang 16105, KoreaAdvanced Railroad Civil Engineering Division, Korea Railroad Research Institute, #176 Railroad Museum St., Uiwang 16105, KoreaSchool of Civil and Environmental Engineering, Yonsei University, Seoul 03722, KoreaIn the transition zone of railway tracks, track irregularities occur frequently due to differential settlement, which arises from the difference between the vertical supporting stiffness of the abutment and the backfill. This is disadvantageous because it increases the maintenance requirements and deteriorates the ride quality. To address this challenge, this study proposes a strategy involving the application of cement-treated gravel reinforced with geogrids and rigid facing walls. The reinforced subgrade for railways (RSR), which can reduce residual settlement through the initial construction of the backfill reinforced with geogrids and the subsequent development of the rigid facing wall, was constructed at the transition zone with cement-treated gravel as the backfill material. The long-term behaviors during and after construction on the RSR for a period of 16 months were evaluated by analyzing the surface and ground settlements, horizontal earth pressure, and geogrid strain. The minor net settlement of the reinforced backfill converges at the early stage of subgrade construction, and the horizontal earth pressure was approximately reduced to the level of 54–63% of the Rankine active earth pressure.https://www.mdpi.com/2076-3417/12/17/8861transition zonedifferential settlementhorizontal earth pressurecement-treated gravelgeogrid |
| spellingShingle | Seongyong Park Dae Sang Kim Ungjin Kim Sangseom Jeong Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under Construction Applied Sciences transition zone differential settlement horizontal earth pressure cement-treated gravel geogrid |
| title | Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under Construction |
| title_full | Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under Construction |
| title_fullStr | Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under Construction |
| title_full_unstemmed | Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under Construction |
| title_short | Low Compressibility at the Transition Zone of Railway Tracks Reinforced with Cement-Treated Gravel and a Geogrid under Construction |
| title_sort | low compressibility at the transition zone of railway tracks reinforced with cement treated gravel and a geogrid under construction |
| topic | transition zone differential settlement horizontal earth pressure cement-treated gravel geogrid |
| url | https://www.mdpi.com/2076-3417/12/17/8861 |
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