考虑地基土流变性的桩承式加筋土挡墙拓宽路基数值模拟
DOI:
作者:
作者单位:

1.华中科技大学土木工程与力学学院;2.中冶建筑研究总院深圳有限公司

作者简介:

通讯作者:

中图分类号:

TU473.1

基金项目:

国家重点研发计划项目(2016YFC0800200);国家自然科学(51808243,51608316)


Numerical analysis of widening subgrade using pile-supported reinforced-earth wall considering rheological characteristics of subsoil
Author:
Affiliation:

1.School of Civil Engineering and Mechanics,Huazhong University of Science and Technology;2.Huazhong University of science and technology;3.Central Research Institute of Building and Construction Shenzhen Co,Ltd,MCC Group

Fund Project:

National Key Research and Development Program Funding (NO. 2016YFC0800200); National Natural Science Foundation of China (51608316,51808243

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为减小既有路基与拓宽路基的不均匀沉降,防止拓宽路基垮塌及路面破坏,针对流变性地基土,提出采用桩承式加筋土挡墙对路基进行拓宽.基于杭甬高速公路拓宽工程,采用FLAC3D建立软黏土地基上的桩承式加筋土挡墙路基拓宽数值模型,在既有路基通车不同年限后,将路基边坡削坡至1:0.5,分层填筑拓宽路基并运行3年(产生流变变形),分析了拓宽前不同通车时间对挡墙的水平位移和路基与地基的沉降量的影响,探讨了桩体布置位置及拓宽方式对路基结构的影响.结果表明:桩承式加筋土挡墙路基拓宽结构具有良好的稳定性与承载性能;拓宽后既有路基出现明显反坡现象,但路面坡比均小于道路功能性要求和结构性要求的容许值0.4%;利用桩承式加筋土挡墙拓宽不仅能降低拓宽路基对既有路基的影响,还能减少拓宽路基路面沉降.

    Abstract:

    In order to reduce the differential settlement between the new and old embankment, prevent the new embankment collapsing and the pavement destroying, pile-supportedSreinforced-earthSwall is carried out to widen embankment on rheological soft-clay. The existing railway slope was cutting to 1:0.5 after opening to traffic at different times.Then filling subgrade and operating it 3 years. The software FLAC3D was used to build model to analyse how the operation time can affect the movement of retaining wall and the settlement of embankment and foundation after widening the subgrade. Discussing how the position of the pile and the way of widening will affect this subgrade widening structure. The experimental results demonstrate that the pile-supported reinforced-earth wall has great stability and bearing capacity. After widening, the existing roadbed appears reverse slope phenomenon obviously, but the slope ratio is less than 0.4% of the allowable road slope ratio of road functional requirements and structural requirements. Using pile-supportedSreinforced-earthSwall can not only reduce the influence of widening subgrad on existing subgrad, but also reduce the settlement of the widening subgrade.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-09-06
  • 最后修改日期:2019-10-24
  • 录用日期:2019-11-27
  • 在线发布日期:
  • 出版日期: