拓宽路基差异沉降监测及数值分析
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

TU433

基金项目:

国家自然科学基金资助项目(51878078)


Widening subgrade differential settlement monitoring and numerical analysis
Author:
Affiliation:

Fund Project:

  • 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:

    为研究高速公路路基改、扩建施工过程中的沉降规律,以莲株高速公路改、扩建工程 K1100+360 段为研 究对象,采用横剖管监测路基沉降,并运用 ABAQUS,建立了扩建路堤模型。提取模拟沉降数据与现场监测数据 进行对比,验证了数值模型的有效性。对路基高度、容重及宽度开展了敏感性分析。研究结果表明:越靠近新路 基路中线,其沉降量越大。沉降量的最大值发生在新路基断面形心垂直位置下,路基沉降量呈现中间大、两边小, 呈“碗盆状”。随着填筑高度继续增加到填筑完成,路基沉降量逐渐减小并趋于稳定;实测沉降量的最大值与数 值模拟沉降量的最大值接近,误差为 1.23%,日均沉降量均小于设计规范的 5 mm。随着填土高度、容重及宽度 的增加,路基承受的自重应力也会增加,沉降量先变大后逐渐减小至稳定。通过对数值模拟和现场实测数据进行 对比分析,得出现场实际路基沉降变形的一般规律,以期为类似高速公路拓宽路基的沉降控制提供借鉴。

    Abstract:

    In order to explore the settlement law during the construction and reconstruction of highway on site is obtained. With a view to providing reference for the settlement control of similar highways to widen the roadbed. subgrade, the pile number K1100+360 of the reconstruction and expansion project of Lianzhu Expressway was taken as the research object. The subgrade settlement was monitored by cross-section pipe, and the ABAQUS software was used to establish the extended embankment model for numerical simulation. The extraction settlement data was compared with the on-site monitoring to verify the validity of the numerical model, and sensitivity analysis was carried out on the height, severity and width of the subgrade. The results show that the larger the settlement value is, the larger the settlement is. The maximum settlement occurs under the vertical position of the new subgrade. The settlement of the subgrade is small and small in the middle. As the filling height continues to increase until the filling is completed, the settlement gradually decreases and tends to be stable. The measured maximum settlement value is close to the numerical simulation maximum settlement value, the error value is 1.23%, and the daily average settlement is less than the design specification of 5 mm. With the increase of the height, gravity and width of the fill, the self-weight stress of the fill increases, and the settlement becomes larger and then gradually decreases to be stabile. By comparing and analyzing the numerical simulation and the field measured data, the general law of settlement and deformation of the actual roadbed

    参考文献
    相似文献
    引证文献
引用本文

张军辉 ,吴厚铭 ,周平 .拓宽路基差异沉降监测及数值分析[J].交通科学与工程,2020,36(1):14-19.
ZHANG Jun-hui, WU Hou-ming, ZHOU Ping. Widening subgrade differential settlement monitoring and numerical analysis[J]. Journal of Transport Science and Engineering,2020,36(1):14-19.

复制
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:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2022-06-09
  • 出版日期: