高速铁路大跨度桥梁轨道平顺性控制标准研究

Research on Track Regularity Control Standard for Long-span Bridges of High-speed Railway

高速铁路大跨度桥梁结构复杂,在徐变、温度荷载、二期恒载等作用下变形大,轨道平顺性控制难度高。现行《高速铁路设计规范》TB 10621-2014、《铁路轨道设计规范》TB 10082-2017、《高速铁路轨道工程施工质量验收标准》TB 10754-2018等标准中规定轨道长波静态高低不平顺采用10mm/300m基线长进行控制,大跨度桥梁设计验收难以满足相关标准要求。为适应高速铁路大跨度桥梁建设需要,在全面总结五峰山、沪苏通、鳊鱼洲、赣江、裕溪河等国内外大跨度桥梁轨道工程实践经验和研究成果的基础上,分析了大跨度桥梁轨道平顺性控制标准存在的主要问题,提出了标准工作建议,为进一步完善铁路工程建设标准体系,推动铁路桥梁高质量发展提供技术支撑。

Long-span bridges of high-speed railway have complex structures, with large deformations under the actions of creep, temperature variation, second-stage dead load, etc.,therefore it is difficult to control the track regularity. The current Code for Design of High-speed Railway TB 10621-2014 Code for Design of Railway Track TB 10082-2017,Standard for Acceptance of Track Works in High-speed Railway TB 10754-2018 and other relevant standards stipulate that the long-wave static irregularity of the track is controlled by a baseline length of 10 mm/300 m, however, in the design acceptance of large-span bridges this requirement is difficult to be met. In order to meet the needs of the construction of high-speed railway long-span bridges, this paper analyzes the control standard of long-span bridge track regularity on the basis of comprehensively summarizing the practical experience and research results regarding long-span bridge track projects at home and abroad such as Wufengshan, Husutong, Bianyuzhou, Ganjiang, Yuxihe bridges. The main problems frequently encountered and a number of suggestions for future standardization work are put forward to provide technical support for further improving railway construction standard system and promoting the high-quality development of railway bridges.