Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verification
This study addresses the mitigation of the floating sleeper phenomenon in ballasted railway tracks through the implementation of Nonionic Cement Asphalt Mortar (CAM). Full-scale testing experiments evaluate track performance with and without CAM stabilization, revealing its efficacy in forming a rob...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524002390 |
| _version_ | 1797234069912682496 |
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| author | Dae-Wook Park Chanyong Choi Tam Minh Phan Tri Ho Minh Le |
| author_facet | Dae-Wook Park Chanyong Choi Tam Minh Phan Tri Ho Minh Le |
| author_sort | Dae-Wook Park |
| collection | DOAJ |
| description | This study addresses the mitigation of the floating sleeper phenomenon in ballasted railway tracks through the implementation of Nonionic Cement Asphalt Mortar (CAM). Full-scale testing experiments evaluate track performance with and without CAM stabilization, revealing its efficacy in forming a robust membrane between ballast particles to reinforce the track-bed structure. Wheel load modeling, including static and dynamic, train movement modeling, roadbed pressure analysis, distribution of load, and track rigidity analysis. Life Cycle Cost Analysis (LCCA) establishes CAM's cost-effectiveness by significantly reducing settlement and ensuring long-term durability. Numerical simulations using ABAQUS demonstrate CAM's effectiveness in stabilizing deteriorated ballast. Furthermore, the simulations prove capable of detecting the floating sleeper phenomenon in the full-scale test bed, offering valuable insights into real-world applications. Both 2D and 3D modeling consistently show a more than 30% reduction in initial settlement and a 0.5 mm displacement in CAM-reinforced ballast compared to controls. Plastic displacement in new ballast is consistently 50% less in the initial 50,000 cycles, with ultimate plastic settlement reduced by 40%, indicating the robustness of CAM across different modeling dimensions. The dataset analysis identifies a floating sleeper issue, evidenced by pressure variations in deteriorated ballast. In the control and simulation sections, there is a pressure drop from 65 kPa to 28 kPa, while the reinforced section maintains stable pressures (50 kPa, 36.5 kPa, 10 kPa) with closely aligned predicted values. Despite pressure reduction in simulated zones, the dataset strongly supports concerns about the substantial pressure decrease due to the floating sleeper phenomenon. LCCA substantiates CAM's economic advantage, showcasing a 79.7% cost reduction over 60 years, endorsing CAM as a sustainable maintenance strategy. In conclusion, CAM stabilization effectively mitigates the floating sleeper effect, ensuring long-term track durability, and providing valuable contributions to sustainable railway infrastructure design and maintenance practices. |
| first_indexed | 2024-04-24T16:26:13Z |
| format | Article |
| id | doaj.art-cd879251cb7848af813b1bfcd27f247f |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-24T16:26:13Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-cd879251cb7848af813b1bfcd27f247f2024-03-31T04:37:24ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e03088Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verificationDae-Wook Park0Chanyong Choi1Tam Minh Phan2Tri Ho Minh Le3Dept. of Civil Engineering, Kunsan National University, 558 Daehak Ro, Kunsan, Jeonbuk, South KoreaKorea Railway Research Institute, 176 Cheldo bangmulgwan-ro, Uiwang, Gyeonggi-do, South KoreaDept. of Civil Engineering, Kunsan National University, 558 Daehak Ro, Kunsan, Jeonbuk, South KoreaFaculty of Civil Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh Street, District 4, Ho Chi Minh City 70000, Viet Nam; Corresponding author.This study addresses the mitigation of the floating sleeper phenomenon in ballasted railway tracks through the implementation of Nonionic Cement Asphalt Mortar (CAM). Full-scale testing experiments evaluate track performance with and without CAM stabilization, revealing its efficacy in forming a robust membrane between ballast particles to reinforce the track-bed structure. Wheel load modeling, including static and dynamic, train movement modeling, roadbed pressure analysis, distribution of load, and track rigidity analysis. Life Cycle Cost Analysis (LCCA) establishes CAM's cost-effectiveness by significantly reducing settlement and ensuring long-term durability. Numerical simulations using ABAQUS demonstrate CAM's effectiveness in stabilizing deteriorated ballast. Furthermore, the simulations prove capable of detecting the floating sleeper phenomenon in the full-scale test bed, offering valuable insights into real-world applications. Both 2D and 3D modeling consistently show a more than 30% reduction in initial settlement and a 0.5 mm displacement in CAM-reinforced ballast compared to controls. Plastic displacement in new ballast is consistently 50% less in the initial 50,000 cycles, with ultimate plastic settlement reduced by 40%, indicating the robustness of CAM across different modeling dimensions. The dataset analysis identifies a floating sleeper issue, evidenced by pressure variations in deteriorated ballast. In the control and simulation sections, there is a pressure drop from 65 kPa to 28 kPa, while the reinforced section maintains stable pressures (50 kPa, 36.5 kPa, 10 kPa) with closely aligned predicted values. Despite pressure reduction in simulated zones, the dataset strongly supports concerns about the substantial pressure decrease due to the floating sleeper phenomenon. LCCA substantiates CAM's economic advantage, showcasing a 79.7% cost reduction over 60 years, endorsing CAM as a sustainable maintenance strategy. In conclusion, CAM stabilization effectively mitigates the floating sleeper effect, ensuring long-term track durability, and providing valuable contributions to sustainable railway infrastructure design and maintenance practices.http://www.sciencedirect.com/science/article/pii/S2214509524002390Railway track stabilizationCAM reinforcementFloating sleeper mitigation2D/3D simulation insightsFull-scale testbed |
| spellingShingle | Dae-Wook Park Chanyong Choi Tam Minh Phan Tri Ho Minh Le Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verification Case Studies in Construction Materials Railway track stabilization CAM reinforcement Floating sleeper mitigation 2D/3D simulation insights Full-scale testbed |
| title | Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verification |
| title_full | Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verification |
| title_fullStr | Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verification |
| title_full_unstemmed | Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verification |
| title_short | Mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation – 2D/3D numerical investigation and full-scale testing verification |
| title_sort | mobilizing railway track stability with nonionic cement asphalt mortar for floating sleeper mitigation 2d 3d numerical investigation and full scale testing verification |
| topic | Railway track stabilization CAM reinforcement Floating sleeper mitigation 2D/3D simulation insights Full-scale testbed |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524002390 |
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