| 36 | 0 | 54 |
| 下载次数 | 被引频次 | 阅读次数 |
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3 mm增至20 mm，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66.2 m增至70.1 m；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 simply supported beam bridge pier settlement and ballastless track deformation in high speed railways, and explore the influence of key pier settlement parameters on track, irregularity characteristics this paper established an analytical model for the mapping relationship between simply supported beam pier settlement and slab ballastless track based on bending deformation theory, fully considering the deformation coordination mechanism of the multi-layer ballastless track structure. The influences of key parameters on track deformation and the mechanical behavior of the fastening system are systematically investigated. The results show that when the pier settlement amplitude increases from 3 mm to 20 mm, the rail uplift amount at the beam end increases by 3.14 times, leading to a significant aggravation of rail irregularity. The fastener uplift force increases by 5.69 times, and the coverage of the rail deformation zone extends from 66.2 m to 70.1 m. When a single bridge pier settles, the rail deformation at the settlement position is slightly smaller than the settlement amplitude. The expansion of the settlement range will increase the maximum rail deformation, and properly improving the elasticity of the ballastless track isolation layer can effectively optimize the track deformation coordination performance.
[1]董亮.侧向堆载引起既有铁路桥梁桩基沉降变形的有限元分析[J].铁道建筑，2017,57(5):7-9.Dong Liang. Finite element analysis on subsidence and deformation of existing railway bridge pile foundation caused by lateral heaped load[J].Railway Engineering,2017,57(5):7-9.
[2]勾红叶，冉智文，蒲黔辉，等.高速铁路桥梁竖向变形与轨面几何形态的通用映射解析模型研究[J].工程力学，2019,36(6):227-238.Gou Hongye,Ran Zhiwen,Pu Qianhui,et al. Study on mapping relationship between bridge vertical deformation and track geometry of high-speed railway[J]. Engineering Mechanics,2019,36(6):227-238.
[3]周凌宇，彭秀生，杨林旗，等.列车荷载下简支梁桥上CRTSⅡ型板式无砟轨道经时力学性能研究[J].铁道学报，2021,43(3):120-129.Zhou Lingyu,Peng Xiusheng,Yang Linqi,et al. Time-dependent mechanical properties of CRTSⅡ slab track on simply supported beam bridge under train load[J].Journal of the China Railway Society,2021,43(3):120-129.
[4]张超.承压水降压引起的高速铁路桥梁摩擦型群桩沉降特性分析[J].铁道建筑，2021,61(6):36-40.Zhang Chao. Analysis of settlement characteristics of friction pile groups of high speed railway bridge caused by pressure drop of confined water[J].Railway Engineering,2021,61(6):36-40.
[5]Cai X P,Liang Y K,Xin T,et al. Assessing the effects of subgrade frost heave on vehicle dynamic behaviors on high speed railway[J]. Cold Regions Science and Technology,2019,158:95-105.
[6]Du J S,Liu H B. Effect of pier vertical deformations on deflections of main girders for high pier and long-span continuous rigid-frame bridges[J]. Advanced Materials Research,2011,163-167:1436-1439.
[7]Cui X H,Ling X.Effects of differential subgrade settlement on damage distribution and mechanical properties of CRTSⅡ slab track[J]. Construction and Building Materials,2021,271:121821.
[8]庞志强，高芒芒，李国龙，等.基于列车响应的运营期高速铁路桥梁沉降阈值[J].铁道建筑，2024,64(5):69-75.Pang Zhiqiang,Gao Mangmang,Li Guolong,et al.Settlement threshold of high speed railway bridge during operation period based on driving response[J].Railway Engineering,2024,64(5):69-75.
[9]Zhang X H,Shan Y,Yang X W,et al. Effect of bridge-pier differential settlement on the dynamic response of a highspeed railway train-track-bridge system[J]. Mathematical Problems in Engineering,2017,2017:8960628.
[10]Chen Z W,Zhai W M,Yin Q.Analysis of structural stresses of tracks and vehicle dynamic responses in train-track-bridge system with pier settlement[J].Proceedings of the Institution of Mechanical Engineers,Part F:Journal of Rail and Rapid Transit,2018,232(2):421-434.
[11]Guo Y,Zhai W M. Long-term prediction of track geometry degradation in high-speed vehicle-ballastless track system due to differential subgrade settlement[J].Soil Dynamics and Earthquake Engineering,2018,113:1-11.
[12]Gou H Y,Ran Z W,Yang L C,et al.Mapping vertical bridge deformations to track geometry for high-speed railway[J].Steel and Composite Structures,2019,32(4):467-478.
[13]Zhang B Q,Chen F Q,Wang Q Y,et al.Analytical model of buried beams on a tensionless foundation subjected to differential settlement[J]. Applied Mathematical Modelling,2020,87:269-286.
[14]Jiang L Z,Zheng L,Feng Y L,et al.Mapping the relationship between the structural deformation of a simply supported beam bridge and rail deformation in high-speed railways[J].Proceedings of the Institution of Mechanical Engineers,2020,234(10):1081-1092.
[15]Guo Y,Zhai W M,Sun Y,et al.Mechanical characteristics of modern tramcar-embedded track system due to differential subgrade settlement[J]. Australian Journal of Structural Engineering,2017,18(3):1-12.
[16]冯玉林，蒋丽忠，陈梦成，等.连续梁桥边墩不均匀沉降下轨道层间变形协调关系及动力学应用[J].工程力学，2021,38(4):179-190.Feng Yulin, Jiang Lizhong, Chen Mengcheng, et al.Deformation compatibility relationship of track interlayer with uneven settlement of side pier of continuous girder bridge and its dynamic application[J].Engineering Mechanics,2021,38(4):179-190.
[17]Yau J D. Response of a train moving on multi-span railway bridges undergoing ground settlement[J]. Engineering Structures,2009,31(9):2115-2122.
[18]Ren J J,Ye W L,Deng S J,et al.Influence of the strain rate on the dynamic damage of cement-asphalt mortar in prefabricated slab tracks[J]. Construction and Building Materials,2021,299:123944.
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,2026,66(08):54-61.
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