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This paper presents the experimental results from tests carried out on a geosynthetic reinforced soil (GRS) bridge abutment constructed at 1/9 scale using sand as a backfill material, geogrid as reinforcement, and modular concrete block as a facing element. The performance of the abutment was studied in terms of bridge seat settlement and lateral facing displacement at the end of construction and after the application of augmented train loading for axle loads of 17 T, 25 T, and 40 T moving at a speed of 400 kmph, 300 kmph, and 120 kmph, respectively. It is observed that after the application of the bridge load, there is a significant change in the facing displacement and the seat settlement. Whereas, after applying the trainload, no notable change in facing displacement was observed. However, there was a significant change in the bridge seat settlement, the maximum facing displacement and the seat settlement values are within the permissible limits as suggested by FHWA.

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Model Test of Scaled Geosynthetic Reinforced Soil Bridge Abutment Under Augmented Railway Loading

  • 会议论文

  • 发表日期：

    2025年

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  • Shivshankar Maurya,
  • Kunjan Saikia,
  • Shantanu Patra

摘要

This paper presents the experimental results from tests carried out on a geosynthetic reinforced soil (GRS) bridge abutment constructed at 1/9 scale using sand as a backfill material, geogrid as reinforcement, and modular concrete block as a facing element. The performance of the abutment was studied in terms of bridge seat settlement and lateral facing displacement at the end of construction and after the application of augmented train loading for axle loads of 17 T, 25 T, and 40 T moving at a speed of 400 kmph, 300 kmph, and 120 kmph, respectively. It is observed that after the application of the bridge load, there is a significant change in the facing displacement and the seat settlement. Whereas, after applying the trainload, no notable change in facing displacement was observed. However, there was a significant change in the bridge seat settlement, the maximum facing displacement and the seat settlement values are within the permissible limits as suggested by FHWA.