混凝土灌注过程中无砟轨道板产生位移的原因

徐桂弘; 刘学毅; 杨荣山; 杨俊斌

doi:10.3969/j.issn.0258-2724.2013.01.007

混凝土灌注过程中无砟轨道板产生位移的原因

doi: 10.3969/j.issn.0258-2724.2013.01.007

基金项目:

国家自然科学基金资助项目(51278431,51208438)

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出版历程
- 收稿日期: 2012-01-13
- 刊出日期: 2013-02-25

Reasons for Displacement of Ballastless Track Slab during Self-Compacting Concrete Pouring

摘要

摘要: 为减少轨道铺设中的精调工作量,提高轨道板的施工精度,根据无砟轨道板下自密实混凝土灌注施工特点,基于流体力学理论建立了轨道板受力计算模型,用Fluent软件模拟计算了灌注过程中轨道板的受力情况.研究结果表明,灌注过程中,自密实混凝土流动作用是引起轨道板位移的主要原因;轨道板受力与自密实混凝土灌注速度呈指数关系增大,当灌注速度大于5 m/s时,需对轨道板施加竖向固定约束.
- 无砟轨道 /
- 位移 /
- 自密实混凝土
Abstract: In order to reduce the workload of fine adjustment track laying and improve the precision of track slab, a calculation model was established based on the characteristic of pouring self-compacting concrete under track slab and the fluid mechanics, and forces on track slab in self-compacting concrete pouring were calculated numerically with software Flulent. The research result shows that dynamic pressure due to pouring self-compacting concrete is a key factor for the displacement of track slab in the process; there is an exponential function relation between pressure on track slab and pouring velocity of self-compacting concrete; when the pouring velocity is greater than 5 m/s, track slab needs to be restrained in its vertical direction.
- ballastless track /
- displacement /
- self-compacting concrete

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参考文献(15)

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文章访问数: 1243
HTML全文浏览量: 78
PDF下载量: 379
被引次数: 0

混凝土灌注过程中无砟轨道板产生位移的原因

doi: 10.3969/j.issn.0258-2724.2013.01.007

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出版历程

Reasons for Displacement of Ballastless Track Slab during Self-Compacting Concrete Pouring

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出版历程

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