粒料回弹模量室内试验方法
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U416.214

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国家自然科学基金项目(51908057);2019年度交通运输行业重点科技项目(2019-MS2-039);陕西省自然科学基础研究计划一般项目(2019JQ-498);公路建设与养护技术、材料及装备交通运输行业研发中心(甘肃路桥建设集团有限公司)开放基金课题(GLKF201804、GLKF201807)。


Laboratory Testing Methods for Determining the Resilient Modulus of Unbound Granular Materials
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    摘要:

    回弹模量是表征粒料刚度和抵抗变形能力的一个重要指标。我国的公路沥青路面设计规范(JTG D50-2017)和美国路面力学-经验设计方法(MEPDG)均采用回弹模量作为沥青路面柔性基层的力学设计参数,用于表征基层材料在车辆动荷载作用下的刚度以及抗永久变形能力。本文首先基于国内外文献调研分析,介绍了粒料回弹模量的影响因素。其次,对中外回弹模量室内试验规程进行了对比分析,并结合室内粒料回弹模量试验结果,提出了粒料回弹模量室内试验方法中的不足和改进方案。最后,总结了国内外现有常用回弹模量预测模型的主要考虑因素。本文的主要研究成果有助于未来修订粒料室内回弹模量试验规程以及建立新的粒料回弹模量预测模型。

    Abstract:

    Resilient modulus (Mr) is an index for characterizing the stiffness and resistance to deformation of unbound granular materials (UGM). Both the Chinese 2017 Specifications for Design of Highway Asphalt Pavement and American Mechanics-Empirical Pavement Design Guide (MEPDG) Method use the resilient modulus as the only mechanical input parameter for structure design of pavement base layers, which can characterize the stiffness or resistance to permanent deformation of the pavement base layers under traffic loads. The present study was conducted to compare various laboratory Mr testing standards of UGM. First, factors that can significantly influence the Mr of UGM are discussed based on a comprehensive literature review. Second, the domestic and foreign laboratory testing standards for determining the Mr of UGM were compared. In addition, laboratory testing results were analyzed to reveal shortcomings of the testing methods, and corresponding methods for improving the shortcomings were proposed accordingly. Last, factors considered in the prediction models of the resilient modulus of UGM were summarized. Key findings presented in this paper can provide guidance for revising the laboratory testing standards and establishing new prediction models of resilient modulus of UGM.

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王旭昊,余祥晶,李程,等. 粒料回弹模量室内试验方法[J]. 科学技术与工程, 2021, 21(13): 5201-5209.
Wang Xuhao, Yu Xiangjing, Li Cheng, et al. Laboratory Testing Methods for Determining the Resilient Modulus of Unbound Granular Materials[J]. Science Technology and Engineering,2021,21(13):5201-5209.

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  • 收稿日期:2020-09-26
  • 最后修改日期:2021-03-12
  • 录用日期:2021-01-10
  • 在线发布日期: 2021-05-28
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