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为揭示高速铁路简支梁桥墩沉降与无砟轨道变形的映射关系，探究桥墩沉降关键参数对轨面不平顺特征的影响，本文基于弯曲变形理论，考虑无砟轨道多层结构变形协调机制，建立了简支梁桥墩沉降与板式无砟轨道映射关系解析模型，研究了关键参数对轨道变形及扣件系统受力的影响。结果表明：随着桥墩沉降幅值由3mm增至20mm，梁端钢轨上拱量增大了3.14倍，钢轨不平顺增大较为显著；扣件上拔力增大了5.69倍，钢轨变形区范围由66.2m增至70.1m；单个桥墩发生沉降时，沉降位置的钢轨变形略小于沉降幅值；沉降范围扩大会造成钢轨最大变形增大；提高无砟轨道隔离层弹性，可有效改善轨道变形协调性能。
Abstract：To reveal the mapping relationship between pier settlement of simply-supported beams for high-speed railways and the deformation of ballastless tracks， and to explore the influences of key pier settlement parameters on rail irregularity characteristics， an analytical model describing the mapping relation between simply-supported beam pier settlement and slab ballastless tracks was established in this study based on bending deformation theory. The deformation compatibility mechanism of the multi-layer ballastless track structure was incorporated into the model， and the effects of key parameters on track deformation and mechanical behaviour of fastening systems were investigated. The results demonstrated that as the pier settlement amplitude increased from 3 mm to 20 mm， the upward arching value of the rail at beam ends was raised by 3.14 times， accompanied by obvious aggravation of rail irregularity. The uplift force of fasteners increased by 5.69 times， and the length of the rail deformation zone expanded from 66.2 m to 70.1 m. When settlement occurred on a single pier， the rail deformation at the settlement position was slightly smaller than the settlement amplitude of the pier. The expansion of settlement coverage induced an increase in the maximum rail deformation. The deformation compatibility performance of the track could be effectively optimised by enhancing the elasticity of the isolation layer beneath the ballastless track.
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基本信息:
中图分类号:U213.244
引用信息:
[1]张乾,王俊奇,王梦,等.基于解析模型的桥墩沉降与无砟轨道变形映射关系研究[J].铁道建筑().
基金信息:
国家自然科学基金（52508522）; 中国国家铁路集团有限公司科技研究开发计划（N2024G032）
2026-08-11
2026-08-11
2026-08-11