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Prediction of moisture migration in flexible pavement systems: An evaluation of the enhanced integrated climatic model.

机译：柔性路面系统中水分迁移的预测：增强型综合气候模型的评估。

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摘要

Superpave was introduced by the Strategic Highway Research Program (SHRP) in 1992 and was adopted by the Arkansas Highway and Transportation Department (AHTD) in 1995. Superpave designs typically use more coarse-graded aggregate blends than the conventional Marshall asphalt mix design. Because of this, Superpave allows more water to migrate into pavement systems, which can result in a variety of water-related problems. These water-related problems can not be well understood until we have a mature understanding of the exact nature of moisture migration in pavement systems.;To get an understanding of the moisture migration pattern in pavement systems, two test pads were constructed at the University of Arkansas and one field test site on Highway 253 in Ft. Smith was developed. Extensive laboratory testing of pavement materials was performed to obtain engineering properties of these materials. Environmental factors including air temperatures, precipitation and groundwater levels, along with pavement responses to environmental factors including surface and subsurface runoff, moisture content, and soil temperatures (only in the field test site) in the pavements were also measured at both sites for relatively long periods.;Based on statistical analyses of the laboratory and field test results, predictive models were developed to predict moisture contents at various levels in the pavement. Additionally, a water migration pattern through the pavements was obtained. A water balance analysis was also performed on one of test pads and a water balance was generally achieved using the proposed pavement storage model and measured surface runoff. The Enhanced Integrated Climate Model (EICM) was also evaluated in Arkansas by comparing predicted with measured data at both sites. Finally, a Finite Element Model (FEM) was created and calibrated based on measured data.
机译：Superpave由1992年的战略公路研究计划（SHRP）引入，并于1995年由阿肯色州公路和运输部（AHTD）采用。Superpave设计通常比常规的Marshall沥青混合料设计使用更多的粗级骨料混合料。因此，Superpave允许更多的水迁移到路面系统中，这可能导致各种与水有关的问题。在我们对人行道系统中水分迁移的确切性质有了深入的了解之前，无法很好地理解这些与水有关的问题。为了了解人行道系统中水分迁移的模式，美国大学建造了两个测试垫阿肯色州和FT 253高速公路上的一个现场测试站点。史密斯被开发出来了。对铺装材料进行了广泛的实验室测试，以获得这些材料的工程特性。还在两个地点测量了较长时间的环境因素，包括气温，降水和地下水位，以及人行道对环境因素的响应，包括地表和地下径流，水分含量和人行道上的土壤温度（仅在现场测试现场）在对实验室和现场测试结果进行统计分析的基础上，开发了预测模型来预测人行道中不同水平的含水量。另外，获得了通过人行道的水迁移模式。还对其中一个测试垫进行了水平衡分析，通常使用建议的路面存储模型和测得的表面径流来实现水平衡。在阿肯色州，还通过比较两个地点的预测数据和实测数据，对增强型综合气候模式（EICM）进行了评估。最后，基于测量数据创建并校准了有限元模型（FEM）。

著录项

  • 作者

    Chang, Xuhui.;

  • 作者单位

    University of Arkansas.;

  • 授予单位 University of Arkansas.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 319 p.
  • 总页数 319
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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