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Treatment Technology of Unsupported Defects in Existing Elastic Short-Sleeper Tracks
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Yujie ZHANG1, Huijun ZHANG2, Shuwei WANG1, Zhenglong GONG2, Long GAO2
Urban Rapid Rail Transit | 2026, 39(2) : 106 - 111
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Urban Rapid Rail Transit | 2026, 39(2): 106-111
• Civil Engineering Technology •
Treatment Technology of Unsupported Defects in Existing Elastic Short-Sleeper Tracks
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Yujie ZHANG1, Huijun ZHANG2, Shuwei WANG1, Zhenglong GONG2, Long GAO2
Affiliations
  • 1.China Railway Design Corporation, Tianjin 300143
  • 2.Jintie Engineering Technology Co., Ltd., Tianjin 301726
doi: 10.3969/j.issn.1672-6073.2026.02.013
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To address the problems of aging and deformation of rubber boots, unsupported sleepers and gauge variation caused by long-term operation on existing elastic short-sleeper tracks, and to improve the stability and operational safety of the track structure, this paper proposes a novel treatment technology for unsupported defects in elastic short-sleeper tracks to overcome the low construction efficiency and insufficient repair precision of existing repair methods. This technology combines a novel high-flow repair material with a refined grouting process, enabling complete filling of gaps smaller than 1 mm. Off-site grouting tests verified the feasibility of the material and construction process, and the mechanical properties of the repaired elastic short-sleeper track were evaluated based on static stiffness and fatigue tests. The test results demonstrate that this treatment method effectively fills the unsupported areas and enhances the overall stability of the track structure. It is suitable for the rapid and efficient repair of existing tracks under time and space constraints and has good potential for engineering application.

urban rail transit  /  existing lines  /  elastic short sleepers  /  unsupported defects  /  defect treatment
张雨洁, 张慧君, 王书卫, 龚正龙, 高龙. 既有线弹性短轨枕空吊病害治理技术研究. 都市快轨交通, 2026 , 39 (2) : 106 -111 . DOI: 10.3969/j.issn.1672-6073.2026.02.013
Yujie ZHANG, Huijun ZHANG, Shuwei WANG, Zhenglong GONG, Long GAO. Treatment Technology of Unsupported Defects in Existing Elastic Short-Sleeper Tracks[J]. Urban Rapid Rail Transit, 2026 , 39 (2) : 106 -111 . DOI: 10.3969/j.issn.1672-6073.2026.02.013
Appendix
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Year 2026 volume 39 Issue 2
132
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doi: 10.3969/j.issn.1672-6073.2026.02.013
  • Receive Date：2025-05-12
  • Online Date：2026-09-20
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  • Received：2025-05-12
  • Revised：2025-11-02
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Affiliations
    1.China Railway Design Corporation, Tianjin 300143
    2.Jintie Engineering Technology Co., Ltd., Tianjin 301726
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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