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Field measurements of surface displacements from pipe bursting .

机译：管道爆破表面位移的现场测量。

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摘要

Two field studies of surface displacements during pipe bursting were conducted. The first field study consisted of a controlled experiment in clay soil. Three vitrified clay pipelines, each at a different burial depth, were up-sized to high density polyethylene (HDPE) pipes using static pipe bursting techniques. Surface displacements during the pipe bursting process were monitored using digital imaging techniques as well as surveying. It was found that ground displacements were largest in the vertical direction, such that the maximum vertical displacements measured during pipe bursting ranged from 71.8 +/- 7.5 mm at a depth of cover of 0.6 m and 11.2 +/- 1.2 mm at a depth of cover of 1.5 m. Transverse displacements generated during pipe bursting were found to correspond to tension cracking of the ground surface above the pipe. The second field study examined pipe bursting installations which took place at the Royal Canadian Mounted Police College campus in Ottawa, Ontario. During this study, five pipe bursting installations were monitored. Each installation varied in terms of the surface and subsurface conditions, host pipe size and material, replacement pipe size, and depth of cover. The pattern of displacements distributed in all three directions was consistent with the results from the controlled study. However, greater variability in results was found during the Ottawa project. Vertical displacements were found to range from 0.6 +/- 0.1 mm to 11.3 +/- 0.2 mm for pipe bursts carried out to the same up-size dimension, at approximately the same depth of cover, surrounded by similar surface and subsurface conditions. In general, pipe bursting in clayey soils with an unpaved surface resulted in larger displacements having a narrower distribution over the ground surface than the paved installations. Additionally, increased variability in results occurred under real construction conditions due to inherent variability in subsurface and host pipe conditions.
机译：进行了两次爆管过程中表面位移的现场研究。第一个现场研究包括在粘土中的对照实验。使用静态管爆裂技术将三根玻璃化的粘土管道（每根都具有不同的埋深）放大至高密度聚乙烯（HDPE）管。使用数字成像技术以及勘测来监测爆管过程中的表面位移。发现地面位移在垂直方向上最大，因此在爆管期间测得的最大垂直位移在0.6m的覆盖深度范围内为71.8 +/- 7.5 mm，而在深度为60毫米时为11.2 +/- 1.2 mm。覆盖1.5 m发现在管道破裂期间产生的横向位移对应于管道上方地面的张力开裂。第二项现场研究检查了在安大略省渥太华的加拿大皇家骑警学院校园内发生的爆管设施。在这项研究中，监测了五个爆管装置。每种安装的表面和地下条件，主管管道的尺寸和材料，替换管道的尺寸以及覆盖深度都不同。在所有三个方向上分布的位移模式与对照研究的结果一致。但是，在渥太华项目期间发现了更大的结果差异。对于在近似相同的覆盖深度，被相似的表面和地下条件包围的情况下，以相同的放大尺寸进行管爆裂，发现垂直位移范围为0.6 +/- 0.1 mm至11.3 +/- 0.2 mm。通常，未铺砌表面的黏土土壤中的管道爆裂导致位移较大，在地面上的分布比铺砌的设备窄。此外，由于地下和主机管道条件的固有变化，在实际施工条件下，结果的变化也越来越大。

著录项

  • 作者

    McLeod, Heather Anne.;

  • 作者单位

    Queen's University (Canada).;

  • 授予单位 Queen's University (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.Sc.
  • 年度 2009
  • 页码 216 p.
  • 总页数 216
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

  • 入库时间 2022-08-17 11:38:29

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