30 t轴重车辆减速器预制轨枕板设计与应用
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摘要
铁路编组站驼峰位置使用的普通轴重减速器轨枕板与道床易产生离缝、空吊,大量轨枕板出现板内裂缝、挡肩碎裂、螺栓孔开裂等病害。对既有普通轨枕板整体和局部构造进行改进,研制出30 t轴重车辆减速器预制轨枕板。通过建立有限元模型对不同工况下该轨枕板的静力学特性和局部受力进行了分析,确定最优结构设计参数;依据极限状态设计方法对轨枕板进行整体和局部配筋设计。铺设后,新型30 t轴重车辆减速器预制轨枕板承载能力和局部抗裂性能良好,安全性和耐久性满足30 t轴重重载要求,没有病害发生。
The common axle load retarder sleeper plate and ballast bed used in the hump position of railway marshalling station are liable to produce slit and empty suspension,and a large number of sleeper slabs have the diseases such as cracks in the slab,shoulder breakage and bolt hole cracking. The integral and local structure of the existing common sleeper slab was improved,and the prefabricated sleeper slab of 30 t axle load vehicle retarder was developed.By establishing the finite element model,the static mechanical characteristics and local forces of the sleeper slab under different working conditions were analyzed,the optimal structural design parameters were determined,and the overall and local reinforcement design of the sleeper slab was carried out according to the limit state design method.After laying,the bearing capacity and local crack resistance of the prefabricated sleeper slab of the newtype30 t axle load retarder is good,the safety and durability could meet the heavy load requirements of 30 t axle load,and no disease occurs.
The common axle load retarder sleeper plate and ballast bed used in the hump position of railway marshalling station are liable to produce slit and empty suspension,and a large number of sleeper slabs have the diseases such as cracks in the slab,shoulder breakage and bolt hole cracking. The integral and local structure of the existing common sleeper slab was improved,and the prefabricated sleeper slab of 30 t axle load vehicle retarder was developed.By establishing the finite element model,the static mechanical characteristics and local forces of the sleeper slab under different working conditions were analyzed,the optimal structural design parameters were determined,and the overall and local reinforcement design of the sleeper slab was carried out according to the limit state design method.After laying,the bearing capacity and local crack resistance of the prefabricated sleeper slab of the newtype30 t axle load retarder is good,the safety and durability could meet the heavy load requirements of 30 t axle load,and no disease occurs.
引文
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[12]郭祥熹.轨枕板钢螺纹尼龙套管与硫磺锚固螺栓受力分析[J].铁道通信信号,2010,46(5):31-33.
[2]李德勇.重力式减速器轨枕板承力台破碎原因分析及修复方法[J].铁道建筑,2015,55(2):42-45.
[3]李秀杰.轨道板式车辆减速器的研制[J].铁道通信信号,2014,50(12):13-15.
[4]何华武.无碴轨道技术[M].北京:中国铁道出版社,2005.
[5]赵国堂.高速铁路无碴轨道结构[M].北京:中国铁道出版社,2006.
[6]李凯华,高立中.车辆减速器混凝土基础的改进和研制[J].铁道通信信号,2012,48(7):25-28.
[7]中华人民共和国铁道部.铁路混凝土结构耐久性设计规范:TB 10005—2010[S].北京:中国铁道出版社,2011.
[8]中华人民共和国铁道部.铁路桥涵混凝土结构设计规范:TB 10092—2017[S].北京:中国铁道出版社,2017.
[9]BENNETT E W,DAVE N J.Test Performances and Design of Concrete Beams with Limited Prestress[J]. The Structural Engineer,1969,47(12):47-49.
[10]GERGELY P,LUTZ L A. Maximum Crack Width in Reinforced Concrete Flexure Members Causes Mechanisms and Control of Cracking in Concrete[J]. The Structural Engineer,1968,46(8):87-117.
[11]栾永平.现浇双块式无砟轨道板裂缝控制机理和预防措施[J].铁道建筑,2010,50(2):21-22.
[12]郭祥熹.轨枕板钢螺纹尼龙套管与硫磺锚固螺栓受力分析[J].铁道通信信号,2010,46(5):31-33.