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首页> 美国政府科技报告 >Evaluation of the Base/Subgrade Soil under Repeated Loading: Phase II - In-Box and ALF Cyclic Plate Load Tests, Technical Summary
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Evaluation of the Base/Subgrade Soil under Repeated Loading: Phase II - In-Box and ALF Cyclic Plate Load Tests, Technical Summary

机译：重复荷载下基础/路基土的评价：II期 - 箱内和aLF循环板载荷试验，技术摘要

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The inadequacy of many existing roads due to rapid growth in traffic volume provides a motivation for exploring alternatives to existing methods of constructing and rehabilitating roads. The use of geosynthetics to stabilize and reinforce paved and unpaved roadways off ers one such alternative. Many studies were conducted to evaluate the improvements associated with geogrid reinforcement of pavements. It is widely believed that geogrid reinforcement of roadways can extend a pavements service life and/or reduce the pavements structural thickness. Several design methods were proposed for flexible pavements with geogrid reinforced base layers. These methods were either based on empirical or analytical approaches. Empirical design methods are usually based on obtaining a performance level from a laboratory model test, which is then extrapolated to the field conditions for design application. The geogrid reinforced design methods based on analytical solution do not address all the variables that affect the performance of these pavements. This report is part of a research study on evaluating the benefits of geogrid reinforcement of base layers in flexible pavements. It presents the findings from large-scale cyclic plate load tests on Accelerated Load Facility (ALF) sections and sections built inside a test box. Another report presented the findings from laboratory triaxial tests and finite element analyses.

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