常用密級配瀝青混凝土路面淺層劈裂強度檢測方法研究
發(fā)布時間：2018-07-26 10:31
【摘要】：在我國，瀝青路面由于強度不足而常常發(fā)生淺層破壞，但淺層強度尚無有效的檢測手段。課題組自行研發(fā)的貫入式路面淺層強度探測儀能夠檢測瀝青路面淺層的劈裂強度，，但還缺少完備的檢測參考標準。本文在已有研究成果的基礎(chǔ)上，設計實驗、運用數(shù)理統(tǒng)計理論深入研究了劈裂強度的影響因素，建立了系統(tǒng)的檢測參考標準和評價方法。 首先，為了提高研究結(jié)果的準確度，分析了已有研究的不足，并進行了相應的改進。 其次，分析了溫度、壓實水平以及級配三個因素對瀝青混合料劈裂強度以及均貫深度的影響程度，對比了劈裂強度和均貫深度的變化行為，提出了劈裂強度和均貫深度的溫度修正方法。 進而，以實驗數(shù)據(jù)為基礎(chǔ)，重點構(gòu)建了劈裂強度的指數(shù)估計模型和反比例函數(shù)估計模型，詳細分析了兩個模型的特點，給出了估計模型的精度以及使用方法，以此作為路面淺層劈裂強度和檢測參考標準。 最后，對比了指數(shù)估計模型和反比例函數(shù)估計模型的異同和適用性，給出了估計模型的使用建議，總結(jié)了檢測參考標準的級配差異性，并基于Matlab開發(fā)了配套的數(shù)據(jù)處理程序。 研究結(jié)果表明，結(jié)合本文提出的檢測參考標準，貫入式路面淺層強度探測儀可以有效地檢測瀝青路面淺層劈裂強度。
[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.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U416.2
本文編號：2145715
[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.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U416.2
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