常用密级配沥青混凝土路面浅层劈裂强度检测方法研究

发布时间：2018-07-26 10:31

【摘要】：在我国，沥青路面由于强度不足而常常发生浅层破坏，但浅层强度尚无有效的检测手段。课题组自行研发的贯入式路面浅层强度探测仪能够检测沥青路面浅层的劈裂强度，，但还缺少完备的检测参考标准。本文在已有研究成果的基础上，设计实验、运用数理统计理论深入研究了劈裂强度的影响因素，建立了系统的检测参考标准和评价方法。首先，为了提高研究结果的准确度，分析了已有研究的不足，并进行了相应的改进。其次，分析了温度、压实水平以及级配三个因素对沥青混合料劈裂强度以及均贯深度的影响程度，对比了劈裂强度和均贯深度的变化行为，提出了劈裂强度和均贯深度的温度修正方法。进而，以实验数据为基础，重点构建了劈裂强度的指数估计模型和反比例函数估计模型，详细分析了两个模型的特点，给出了估计模型的精度以及使用方法，以此作为路面浅层劈裂强度和检测参考标准。最后，对比了指数估计模型和反比例函数估计模型的异同和适用性，给出了估计模型的使用建议，总结了检测参考标准的级配差异性，并基于Matlab开发了配套的数据处理程序。研究结果表明，结合本文提出的检测参考标准，贯入式路面浅层强度探测仪可以有效地检测沥青路面浅层劈裂强度。
[Abstract]:In our country, asphalt pavement is often damaged by shallow layer because of insufficient strength, but there is no effective testing method for shallow layer strength. The penetration type shallow layer strength detector developed by our team can detect the splitting strength of the shallow layer of asphalt pavement, but there is still a lack of a complete reference standard. On the basis of the existing research results, this paper designs experiments, studies the influencing factors of splitting strength by using mathematical statistics theory, and establishes a systematic test reference standard and evaluation method. Firstly, in order to improve the accuracy of the research results, the shortcomings of the existing research are analyzed and the corresponding improvements are made. Secondly, the influence of temperature, compaction level and gradation on the splitting strength and average penetration depth of asphalt mixture is analyzed, and the variation behavior of splitting strength and uniform penetration depth is compared. A temperature correction method for splitting strength and uniform penetration depth is proposed. Then, based on the experimental data, the exponential estimation model of splitting strength and the inverse proportional function estimation model are constructed. The characteristics of the two models are analyzed in detail, and the accuracy and application method of the two models are given. It is used as the reference standard for pavement shallow-layer splitting strength and detection. Finally, the similarities and differences between the exponential estimation model and the inverse proportional function estimation model are compared, the suggestions for the use of the estimation model are given, the gradation differences of the detection reference standards are summarized, and a corresponding data processing program based on Matlab is developed. The research results show that, combined with the reference standard proposed in this paper, the penetration type shallow pavement strength detector can effectively detect the shallow-layer splitting strength of asphalt pavement.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.2

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