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Reduction of smear effects around PVD using thermo-PVD

机译：使用热PVD减少PVD周围的拖影效应

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摘要

This paper presents the effects of raising the temperature of soft Bangkok clay, up to 90℃, in combination with the performance of prefabricated vertical drains (PVD) during the preloading process called thermo-PVD, as measured in laboratory model tests. For both reconstituted and undisturbed specimens, higher settlements were observed for the soil specimens with thermo-PVD loaded with constant vertical stress. Furthermore, using thermo-PVD, K_hIK_s decreased while the coefficient of horizontal consolidation C_h increased for both the undisturbed and reconstituted specimens, which resulted in an increased rate of consolidation. This behaviour can be attributed to an increase in the hydraulic conductivity of the soil as the soil temperature increased within the smear zone surrounding the PVD. Therefore, using thermo-PVD, which combines a heat source and drainage with the PVD, the drainage performance can be enhanced by reducing the drainage retardation effects in the smear zone around the thermo-PVD.
机译：本文介绍了将软曼谷黏土的温度提高到90℃的效果，并结合了预热过程中预制的垂直排水（PVD）的性能（称为热PVD），这在实验室模型测试中进行了测量。对于重构样本和未扰动样本，在带有恒定垂直应力的热PVD的土壤样本中观察到更高的沉降。此外，对于未扰动和重构的样本，使用热PVD时，K_hIK_s减小，而水平固结系数C_h增大，这导致固结率增加。这种行为可归因于在PVD周围涂污区域内土壤温度升高时土壤的水力传导率增加。因此，使用将热源和排水与PVD相结合的热PVD，可以通过减小热PVD周围的涂抹区域中的排水延迟效果来提高排水性能。

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  • 来源
    《Proceedings of the Institutuion Civil Engineers》 |2008年第gi4期|179-187|共9页
  • 作者

    C. Pothiraksanon; J. Saowapakpiboon; D. T. Bergado; N. Y. Than;

  • 作者单位

    Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathumthani, Thailand;

    Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathumthani, Thailand;

    Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathumthani, Thailand;

    Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathumthani, Thailand;

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  • 正文语种 eng
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  • 关键词

    strength and testing of materials; stress analysis;

    机译：材料的强度和测试;应力分析;

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