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Tests and analysis of geogrids as base-reinforcing materials.

机译：作为基础加固材料的土工格栅的测试和分析。

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摘要

A quantitative assessment of geogrids as base reinforcing material in paved roads is clearly necessary when a design is needed and decisions are to be made as a consequence. Two full scale single wheel load tests were conducted to determine the performance of geogrids as base reinforcing materials in paved roads. These two full scale tests were set up with different base thicknesses, material properties, loading conditions and geogrids. Load, speed, and direction of a test cart were controlled with a computer. Although many types of instruments were installed, measurements of vertical deformation of the pavement surface proved to be the most useful. The Traffic Benefit Ratio (TBR), defined as the ratio of the life of a reinforced section to the life of a similar unreinforced section, was used as a primary design parameter. Comparisons between reinforced and unreinforced bases are presented. The parameters used for comparison were permanent vertical deformation, number of repetitions to failure, tire load, and thickness of base course. Test results showed that the maximum TBR for a Tensar BR2 geogrid was 10. This TBR was obtained at a design deformation of 1.0 inch with 2 inches of asphalt over 10 inches of base over a CBR 3 clay subgrade. TBR's for other conditions ranged between 1 and 10. A design reference chart is presented for using Tensar BR1 and BR2 Geogrids.
机译：当需要进行设计并因此要做出决定时，显然有必要对土工格栅作为铺装道路的基础增强材料进行定量评估。进行了两次全尺寸单轮载荷测试，以确定土工格栅在铺装道路中作为基础增强材料的性能。设置了这两种全尺寸测试，它们具有不同的基础厚度，材料特性，加载条件和土工格栅。测试推车的负载，速度和方向由计算机控制。尽管安装了许多类型的仪器，但事实证明，对路面垂直变形的测量是最有用的。交通效益比率（TBR）定义为加强型材的寿命与类似的非加强型材的寿命之比，被用作主要设计参数。进行了加固和未加固基础之间的比较。用于比较的参数是永久垂直变形，重复失效次数，轮胎载荷和基层厚度。测试结果表明，Tensar BR2土工格栅的最大TBR为10。该TBR是在1.0英寸设计变形下，在CBR 3粘土路基上的10英寸基础上，2英寸沥青和10英寸基础上获得的。其他条件下的TBR在1到10之间。给出了使用Tensar BR1和BR2 Geogrids的设计参考图。

著录项

  • 作者

    Fu, Xuemin.;

  • 作者单位

    University of Alaska Fairbanks.;

  • 授予单位 University of Alaska Fairbanks.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 131 p.
  • 总页数 131
  • 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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