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首页> 外文会议>Airfield and Highway Pavement Specialty Conference; 20060430-0503; Atlanta,GA(US) >Effects of Design and Site Factors on Roughness of Flexible Pavements in the LTPP SPS-1 Experiment
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Effects of Design and Site Factors on Roughness of Flexible Pavements in the LTPP SPS-1 Experiment

机译：设计和场地因素对LTPP SPS-1实验中的柔性路面粗糙度的影响

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Although considerable mechanistic-empirical research exists on the factors affecting flexible pavement roughness, it is limited in scope because of inadequate field validation and the complex interactions of structural and site factors. This paper presents results of a study on the relative influence of design and site factors on roughness of in-service flexible pavements. The data from the SPS-1 experiment of the LTPP program were used in this study to investigate the effects of HMA surface layer thickness, base type, base thickness, and drainage on roughness of flexible pavements constructed in different site conditions (subgrade type and climate). Since this is the first comprehensive study of SPS-1 experimental data, a thorough methodology involving mean comparisons and multivariate ANOVA was adopted for data analyses. Among the design factors, base type was found to have the most significant effect on roughness. The best performance was shown by pavement sections with asphalt-treated bases. Drainage when combined with base type, also plays an important role in inhibiting roughness, while base thickness has only secondary effects. In addition, climatic conditions were found to have considerable influence. Pavement sections in the wet-freeze zone exhibited higher levels of roughness. Also, in general, pavements built on fine-grained soils have shown the worst roughness levels. While most of the findings from this study support the existing understanding of factors affecting roughness, important interactions between design and site factors were identified and provide new insights for achieving better long-term pavement performance.
机译：尽管对影响柔性路面粗糙度的因素进行了大量的机械实证研究，但由于现场验证不足以及结构和工地因素之间的复杂相互作用，其范围受到了限制。本文介绍了设计和工地因素对在役柔性路面粗糙度的相对影响的研究结果。这项研究使用了LTPP程序的SPS-1实验数据来研究HMA表层厚度，基础类型，基础厚度和排水对在不同工地条件（路基类型和气候）下构造的柔性路面的粗糙度的影响。 ）。由于这是对SPS-1实验数据的首次全面研究，因此采用了包含均值比较和多元ANOVA的详尽方法进行数据分析。在设计因素中，基本类型对粗糙度影响最大。沥青处理过的基层的路面截面显示出最佳性能。与基础类型组合使用时，排水在抑制粗糙度方面也起着重要作用，而基础厚度仅具有次要作用。另外，发现气候条件具有相当大的影响。湿冻区的路面部分表现出较高的粗糙度。同样，一般而言，在细粒土壤上建造的路面显示出最差的粗糙度。尽管这项研究的大多数发现都支持对影响粗糙度的因素的现有理解，但已确定了设计因素和工地因素之间的重要相互作用，并为实现更好的长期路面性能提供了新的见解。

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