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A platform for research: civil engineering, architecture and urbanism
Experimental investigation and numerical analysis on the performance of flowable soil as feasible backfill material for railway bridge approach
Abstract Transition zones in railway track networks are locations that suffer from the considerable changes in track support structures which result in the abrupt change in track stiffness furthermore causing severe damage to the railway track system. Hence, this study aims to develop a novel flowable soil as backfill material for railway bridge approach which resolves the sudden change in track stiffness at these transition zones, thereby enhancing the service life of the whole track system. To further justify the economical and practical advantages of this new backfill material, two mixture-types of flowable soil are created using locally available resources: silty soil and clayey soil. Evaluation of the behavior of these two mixture-types is done through the flowability, setting-time, unconfined compressive strength, and freeze–thaw cycle tests. Numerical simulation is then employed to investigate the performance of flowable soil as a backfill material for railway bridge approach under repeated loads from trains in mitigating the severe vibration. The findings reveal that the engineering properties of the silty soil mixtures outperform that of the clayey soil mixtures, especially in terms of their strength and durability. Based on the experiment and simulation results, flowable soil is promising to be applied as sustainable backfill material of the railway bridge approach. The lightweight and proper resilience modulus of this material are confirmed to release the burden on track foundation and thereby, improving the track stiffness at bridge end under dynamic train loads.
Experimental investigation and numerical analysis on the performance of flowable soil as feasible backfill material for railway bridge approach
Abstract Transition zones in railway track networks are locations that suffer from the considerable changes in track support structures which result in the abrupt change in track stiffness furthermore causing severe damage to the railway track system. Hence, this study aims to develop a novel flowable soil as backfill material for railway bridge approach which resolves the sudden change in track stiffness at these transition zones, thereby enhancing the service life of the whole track system. To further justify the economical and practical advantages of this new backfill material, two mixture-types of flowable soil are created using locally available resources: silty soil and clayey soil. Evaluation of the behavior of these two mixture-types is done through the flowability, setting-time, unconfined compressive strength, and freeze–thaw cycle tests. Numerical simulation is then employed to investigate the performance of flowable soil as a backfill material for railway bridge approach under repeated loads from trains in mitigating the severe vibration. The findings reveal that the engineering properties of the silty soil mixtures outperform that of the clayey soil mixtures, especially in terms of their strength and durability. Based on the experiment and simulation results, flowable soil is promising to be applied as sustainable backfill material of the railway bridge approach. The lightweight and proper resilience modulus of this material are confirmed to release the burden on track foundation and thereby, improving the track stiffness at bridge end under dynamic train loads.
Experimental investigation and numerical analysis on the performance of flowable soil as feasible backfill material for railway bridge approach
Ho Minh Le, Tri (author) / Lee, Tack-Woo (author) / Seo, Jung-Woo (author) / Park, Dae-Wook (author)
2021-03-08
Article (Journal)
Electronic Resource
English
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