| 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. |
| 关键词: 半刚性 路堑基床 动力响应 |
| DOI： |
| 分类号:TU443 |
| 基金项目:国家自然科学基金资助项目(51478484；51778641) |
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| Effect of the semi-rigid waterproof structure thickness ondynamic response of cutting bedding in expansive soil areas |
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Hu Min1,Yang Guolin2,FangYihe21,2
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1．School of Architecture and Art, Hunan University of Science and Technology,Xiangtan 411201,China;2.School of Civil Engineering, Central South University, Changsha 410000,China
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| Abstract: |
| 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. |
| Key words: semi-rigid cutting bedding dynamic response |
