文章摘要
半刚性防水结构层厚度对膨胀土路堑 基床动力响应的影响
Effect of the semi-rigid waterproof structure thickness ondynamic response of cutting bedding in expansive soil areas
  
DOI:
中文关键词: 半刚性  路堑基床  动力响应
英文关键词: semi-rigid  cutting bedding  dynamic response
基金项目:国家自然科学基金资助项目(51478484;51778641)
作者单位
胡敏1,杨果林2,房以河2 1.湖南科技大学 建筑与艺术学院,湖南 湘潭 411201
2.中南大学 土木工程学院,湖南 长沙 410000 
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中文摘要:
      在分析膨胀土地区路堑基床病害特点的基础上,开展了半刚性防水层的路堑基床动力特性研究.在基床中设置了一层半刚性防水结构层后,这种基床结构在列车循环往复动荷载作用下,其动力特性与普通基床结构相比发生了显著的变化.本文研究了半刚性防水层铺设厚度的改变对膨胀土路堑基床动力响应的影响,结果表明:随着防水层厚度的增大,基床内的动应力变化不大,路基面动位移呈线性减小.
英文摘要:
      Based on analysis results of the character and mechanism of subgrade disease, the dynamic behavior of new typesubgrade with semi-rigid water-proof structure layer was researched. Due to the effects of semi-rigid waterproof structure, the dynamic response of new type cutting bedding was different from the traditional with train loads. In this article effect of the semi-rigid waterproof structure thickness on dynamic response of cutting bedding was been researched. The resultsshow that, with the increase of the waterproof structure thickness, the dynamic stress in bedding changes little, the dynamic displacement of subgrade surface decreases linearly.
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