- ISSN 0258-2724
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| Citation: | ZHAI Wanming, ZHU Shengyang. Key Scientific and Technical Issues on Durability Enhancement of Track Structures for High-Speed and Heavy-Haul Railways[J]. Journal of Southwest Jiaotong University, 2026, 61(3): 637-655. doi: 10.3969/j.issn.0258-2724.20260161
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High-speed passenger transport and heavy-haul freight transport are the main features of modern railway development. At present, China has built globally leading high-speed and heavy-haul railway networks in terms of scale, and a large number of lines have entered a critical stage of long-term high-load operation and maintenance. How to further enhance the durability of in-service track structures in complex and harsh operating environments and ensure the long-term highly safe, highly stable, and highly reliable service of high-speed and heavy-haul railway track structures has become a major strategic challenge facing the rail transit engineering field in China in the new era. In view of the structural characteristics of high-speed and heavy-haul railway track structures in China and the features of their complex operating environments, to achieve the durability enhancement of track structures, two key scientific issues were condensed (① evolution mechanism of service performance and life assessment and prediction of high-speed and heavy-haul railway track structures and ② durability enhancement mechanism and multi-dimensional regulation mechanism of track structures under complex service conditions), as well as three key technical issues (① high-frequency fatigue characteristics of high-speed railway track components and collaborative regulation technology of wheel-rail system vibration, ② key technologies for component strengthening and performance enhancement of heavy-haul railway track structures under high-traffic-volume conditions, and ③ efficient reinforcement, repair, and rapid retrofitting technologies for track structures). A systematic review of the state-of-the-art progress and cutting-edge advances in the research field was provided. On this basis, the engineering applications and full-scale field validation outcomes of a complete set of durability enhancement technologies, independently developed and deployed by the authors’ team for high-speed and heavy-haul railway lines across typical service conditions were demonstrated. Finally, the future development prospects and critical research priorities in this field were clarified.
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