城市轨道交通预制轨道板尺寸与线路线型适应性研究
段海滨段玉振陈鹏
Adaptability of Prefabricated Track Slab Dimensions to Track Alignments in Urban Rail Transit
DUAN HaibinDUAN YuzhenCHEN Peng
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作者信息:北京城建设计发展集团股份有限公司，100037，北京
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Affiliation:Beijing Urban Construction Design & Development Group Co., Ltd., 100037, Beijing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.07.031
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中图分类号/CLCN:U231.3
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栏目/Col:研究报告
摘要:
［目的］通过研究预制轨道板尺寸与线路线型的适应性关系，并根据相应的限制条件提出合理的预制板尺寸，为预制轨道板的工程设计及标准化提供依据。［方法］依据预制轨道板通过以直代曲和扣件横向调整实现平面曲线线型，通过扣件竖向调整以实现缓和曲线及竖曲线线型的施工，由几何关系得到扣件横向允许调整量和竖向允许调整量与板长的关系表达式。通过几何关系，根据板缝的允许值得出预制板长度与宽度间的关系表达式。［结果及结论］研究表明,轨道板长度限值与扣件横向允许调整量及扣件竖向允许调整量关系密切,线型不是预制板宽度的限制因素。建议扣件横向允许调整量取值2mm，竖向允许调整量取值15mm;建议同一条线预制板长度的规格不大于两种，当线路曲线半径R≥950m时采用长度为5.9m板,当300m≤R<950m时采用长度为3.5m板,当R＜300m时采用横向大调整量扣件。
Abstracts:
［Objective］ By investigating the adaptability relationship between prefabricated track slab dimensions and track alignments, and proposing reasonable prefabricated slab dimensions based on corresponding constraints, a basis for the engineering design and standardization of prefabricated track slabs is provided.［Method］ Prefabricated track slabs can achieve planar curve alignment through substituting straight segments for curved segments and adjusting fasteners laterally. Construction of transition curve and vertical curve alignment is achieved through adjusting fasteners vertically. The expressions of the allowable lateral and vertical adjustment amounts of the fasteners in relation to slab length are derived based on geometric relationships. Through geometric relationships, the expression of the relationship between prefabricated slab length and width is determined based on the allowable value of slab gaps.［Result & Conclusion］ Research shows that the track slab length limit is closely related to the allowable lateral and vertical adjustment amounts of the fasteners, while the alignment is not a limiting factor for prefabricated slab width. It is recommended to set the allowable lateral adjustment of fasteners to 2 mm, and the allowable vertical adjustment to 15 mm. For the same line, it is suggested that the specifications of prefabricated slab lengths should not exceed two types. When track curve radius is R ≥ 950 m, slabs with a length of 5.9 m are recommended. For curve radii 300 m ≤ R < 950 m, slabs with a length of 3.5 m are recommended. When R＜300 m, fasteners with large lateral adjustment amount are recommended.
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