城市轨道交通连块式轨枕整体道床配筋设计
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摘要
考虑到长轨枕和短轨枕在城市轨道交通建设和运营中存在不足,针对城市轨道交通隧道断面狭小、轨道结构高度受限、施工运输不便等特点,设计了新型连块式轨枕。结合连块式轨枕特点及城市轨道交通相关标准,对隧道内、路基上及桥上整体道床进行配筋设计:隧道地段道床板混凝土在荷载组合作用下不会开裂,则根据构造配置钢筋;桥梁和路基地段在荷载组合作用下,道床混凝土会开裂,则其道床配筋由裂缝限值控制。
Considering the shortage of long and short sleepers in the construction and operation of urban rail transit, a new metro connected-block sleeper is designed based on the characteristics of narrow section of subway tunnel, high limit of track structure, inconvenience of construction and transportation. Then, combined with the characteristics of connected-block sleeper and the relevant metro standards, a reinforcement design of metro monolithic roadbed in the tunnel, on the roadbed and bridge is implemented. The concrete of the monolithic roadbed in tunnel will not crack under the load combination, and the steel is configured according to the structure. While the concrete of the monolithic roadbed on bridge and road will crack under the load combination, so the monolithic roadbed reinforcement is controlled by the limit of the crack.
Considering the shortage of long and short sleepers in the construction and operation of urban rail transit, a new metro connected-block sleeper is designed based on the characteristics of narrow section of subway tunnel, high limit of track structure, inconvenience of construction and transportation. Then, combined with the characteristics of connected-block sleeper and the relevant metro standards, a reinforcement design of metro monolithic roadbed in the tunnel, on the roadbed and bridge is implemented. The concrete of the monolithic roadbed in tunnel will not crack under the load combination, and the steel is configured according to the structure. While the concrete of the monolithic roadbed on bridge and road will crack under the load combination, so the monolithic roadbed reinforcement is controlled by the limit of the crack.
引文
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[4] 张岷.城市轨道交通用新型连块式轨枕设计研究[J].铁道建筑,2017(11):122.
[5] 杨宝峰,于春华.铁路轨枕现状及发展[J].铁道工程学报,2016(12):105.
[6] ESVELD C.现代铁路轨道[M].王平,陈嵘,井国庆,译.北京:中国铁道出版社,2014.
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