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为提高列车通行性能，从高速铁路设计需求出发，建立桥梁、路基区段双块式无砟轨道仿真模型以及列车-轨道-桥梁/路基动力学耦合模型，计算不同轨枕间距（510～725 mm）下轨道整体刚度、钢轨垂向位移、钢轨弯矩、钢轨动弯应力、轨道结构受力、动态轨距扩大量等性能指标，从静力和动力两方面分析轨枕间距对双块式无砟轨道服役性能的影响规律。结果表明：对于桥梁、路基区段双块式无砟轨道，轨枕间距从510 mm增至725 mm，轨道整体刚度下降约6%～15%，钢轨动弯应力增大约7%～8%，动态轨距扩大量增大了1.6～1.9倍，各指标均在规范容许限值内；随着轨枕间距增大，车体、钢轨、道床板的垂向加速度和位移均增大；桥梁区段车体、钢轨、道床板的垂向加速度大于路基区段；轨枕间距对车体、轨道系统垂向位移的影响程度大于对垂向加速度的影响。
Abstract：To improve the performance of train passage, starting from the design requirements of high speed railways, a simulation model of double-block ballastless track in bridge and subgrade sections, as well as a dynamic coupling model of train-track-bridge/subgrade, were established. Performance indicators such as overall stiffness of the track, vertical displacement of the rail, bending moment of the rail, dynamic bending stress of the rail, stress on the track structure, and dynamic gauge expansion were calculated under different rail sleeper spacing(510～725 mm). The influence of rail sleeper spacing on the service performance of double block ballastless track was analyzed from both static and dynamic perspectives. The results show that for double block ballastless tracks in bridge and subgrade sections, increasing the sleepers spacing from 510 mm to 725 mm could reduce the overall stiffness of the track by about 6% to 15%, increase the dynamic bending stress of the rail by about 7% to 8%, and increase the dynamic gauge expansion by 1.6 to 1.9 times. All indicators are within the allowable limits of the specifications. As the spacing between rail sleepers increases, the vertical acceleration and displacement of the vehicle body, steel rails, and track bed plates all increase. The vertical acceleration of the vehicle body, steel rails, and track bed plates in the bridge section is greater than that in the roadbed section. The influence of sleeper spacing on the vertical displacement of the vehicle body and track system is greater than that on the vertical acceleration.
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基本信息:
中图分类号:U213.244
引用信息:
[1]靳昊,楚金辉,梁雪江,等.轨枕间距对桥梁/路基区段双块式无砟轨道服役性能的影响[J].铁道建筑,2026,66(07):13-17.
基金信息:
国家重点研发计划（2025YFF0519100）; 中国国家铁路集团有限公司科技研究开发计划（N2021G048）
2026-06-30
2026-06-30
2026-06-30