本文選題：剪應(yīng)力 + 貝雷法��； 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：受地形的限制，公路路線中難免會出現(xiàn)長大縱坡路段，特別是在西部高速公路建設(shè)中，由于山地、丘陵眾多，長大縱坡路段更是隨處可見。因坡度的影響，車輛在長大縱坡路段行駛狀態(tài)與平坡路段有所不同，車速會減慢，并且需頻繁的制動和啟動，這些都使得長大縱坡路段瀝青路面更易遭到破壞。本文依托甘肅省交通廳項目《黃土地區(qū)高速公路長大縱坡路段瀝青路面關(guān)鍵技術(shù)研究》（甘交工(科研)2012年第03號），結(jié)合甘肅省雷西高速公路縱坡路段路面結(jié)構(gòu)形式，以提升混合料高溫穩(wěn)定性能為核心，從應(yīng)力分析、級配、材料組成、路用性能等方面對長大縱坡路段瀝青路面中面層進(jìn)行研究。 本文首先在對石忠高速公路長大縱坡路段瀝青路面破壞性調(diào)查的基礎(chǔ)上，分析確定了長大縱坡中面層的破壞類型以失穩(wěn)性車轍破壞為主。并采用雷西高速長大縱坡路段路面結(jié)構(gòu)形式，利用Bisar3.0力學(xué)軟件對剪應(yīng)力進(jìn)行分析，得出了最大剪應(yīng)力空間分布規(guī)律，分析了坡度、深度、水平荷載系數(shù)、重載等因素對中面層最大剪應(yīng)力的影響。 然后針對中面層高溫穩(wěn)定性的提升，從兩個方面入手研究。在膠結(jié)料方面，通過常規(guī)實驗、SHRP試驗對不同摻量的SBS+巖瀝青和SBS+TLA兩種復(fù)合改性瀝青的高低溫、溫度敏感性、老化、流變等性能進(jìn)行了研究。綜合各方面性能，對巖瀝青、TLA兩種天然瀝青的摻量進(jìn)行了初步確定。在級配上，對粗細(xì)集料劃分標(biāo)準(zhǔn)進(jìn)行分析，將4.75mm作為本次粗細(xì)集料劃分界篩孔。以粒子干涉為理論基礎(chǔ)，對粗集料進(jìn)行逐級填充，同時進(jìn)行干搗實密度試驗，按照粗集料最緊密堆積為原則，確定了粗集料的組合比例。由于對細(xì)集料填充，均勻性難以控制，，因此細(xì)集料級配不再采用逐級填充的干搗實密度實驗確定，而是在林秀賢建議的Superve-20級配范圍進(jìn)行平均分配設(shè)計，再結(jié)合貝雷參數(shù)，對級配進(jìn)行修正。 最后，通過路用性能實驗，研究了不同級配和不同膠結(jié)料對路用性能的影響，并將路用性能指標(biāo)與膠結(jié)料性能指標(biāo)進(jìn)行對比研究，分析出SBS+巖瀝青、SBS+TLA兩種復(fù)合改性瀝青高低溫指標(biāo)與混合料高低溫性能的關(guān)系，提出能夠表征兩種復(fù)合改性瀝青膠結(jié)料高低溫性能的指標(biāo)。結(jié)合依托工程氣候特征，綜合膠結(jié)料性能和混合料性能，確定了兩種復(fù)合改性瀝青的最優(yōu)摻配比例，并將最優(yōu)摻量時兩種復(fù)合改性瀝青的優(yōu)劣性進(jìn)行對比分析。
[Abstract]:Due to the limitation of terrain, it is inevitable that the long longitudinal slope section will appear in the highway route, especially in the construction of the western expressway, because of the mountains and hills, the long longitudinal slope section can be seen everywhere. Because of the influence of the slope, the driving state of the vehicle on the long longitudinal slope is different from that on the flat slope, and the speed of the vehicle will slow down, and it needs frequent braking and starting, which makes the asphalt pavement on the long longitudinal slope more vulnerable to damage. This paper relies on the project of Gansu Provincial Communications Department < Research on key Technology of Asphalt pavement in Longitudinal Slope Section of Expressway in Loess region "(Ganjiaogong (Scientific Research) No. 03 of 2012), combined with Longitudinal Slope pavement structure form of Longitudinal Slope Section of Laixi Expressway in Gansu Province, In order to improve the high temperature stability of the mixture, the middle surface of the asphalt pavement on the long longitudinal slope is studied from the aspects of stress analysis, gradation, material composition, road performance and so on. Based on the destructive investigation of asphalt pavement in long longitudinal slope section of Shizhong Expressway, this paper analyzes and determines that the main failure type of the middle surface of long longitudinal slope is rut failure. Using the structure form of long longitudinal slope section of Raixi Expressway, the shear stress is analyzed by Bisar3.0 software, and the spatial distribution law of maximum shear stress is obtained, and the slope, depth and horizontal load coefficient are analyzed. The influence of heavy load and other factors on the maximum shear stress of the middle surface layer. Then, in view of the enhancement of the high temperature stability of the middle surface layer, two aspects are studied. In the aspect of cementing material, the properties of SBS rock asphalt and SBS TLA composite modified asphalt with different content were studied by routine experiment and SHRP test. The properties of high and low temperature, temperature sensitivity, aging and rheology were studied. In this paper, the content of TLA and TLA in rock pitch is determined. In the gradation, the classification standard of coarse and fine aggregate is analyzed, and 4.75mm is used as the boundary sieve hole of this coarse aggregate. Based on the theory of particle interference, the coarse aggregate was filled step by step, and the dry compaction density test was carried out at the same time. According to the principle of the closest packing of coarse aggregate, the combined proportion of coarse aggregate was determined. Because the uniformity of fine aggregate filling is difficult to control, the fine aggregate gradation is not determined by step dry compaction density experiment, but is designed evenly in the Superve-20 gradation range suggested by Lin Xiuxian, and then combined with the Bayley parameter. Revise the gradation. Finally, through the road performance experiment, the influence of different gradation and different binder on the road performance is studied, and the road performance index is compared with the binder performance index. The relationship between the high and low temperature properties of SBS rock asphalt and TLA composite modified asphalt is analyzed, and the index which can characterize the high and low temperature performance of two kinds of composite modified asphalt binders is proposed. Based on the characteristics of engineering climate, the optimum blending ratio of two kinds of composite modified asphalt was determined by synthesizing the performance of binder and mixture, and the advantages and disadvantages of the two kinds of composite modified asphalt were compared and analyzed.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.217;U414

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 查旭東;王彬;季文廣;;TLA灰分對瀝青膠漿高溫性能的影響[J];交通科學(xué)與工程;2009年04期

2 李雙瑞;林青;董聲雄;;SBS改性瀝青機理研究進(jìn)展[J];高分子通報;2008年05期

3 姚勇;彭賽恒;曹陽;張寧;陳飛;;長大縱坡段瀝青混凝土路面層間滑移研究[J];公路;2009年04期

4 李開;;長大縱坡對瀝青路面產(chǎn)生車轍的影響分析[J];公路交通科技(應(yīng)用技術(shù)版);2008年03期

5 林繡賢;論Superpave組成配比的特色[J];華東公路;2002年01期

6 楊海榮;關(guān)宏信;;高溫、重載、慢速條件下上坡瀝青路面車轍[J];長沙理工大學(xué)學(xué)報(自然科學(xué)版);2008年04期

7 吳少鵬;王家主;陳太泉;;長大縱坡瀝青路面應(yīng)力分析[J];武漢理工大學(xué)學(xué)報(交通科學(xué)與工程版);2006年06期

8 張媛;鄒桂蓮;;長大縱坡的瀝青路面受力研究[J];科學(xué)技術(shù)與工程;2010年22期

9 沈金安;;瀝青材料的流變學(xué)(一)[J];石油瀝青;1988年04期

相關(guān)博士學(xué)位論文 前1條

1 吳浩;陡長上坡路段瀝青路面車轍的形成機理與防治對策研究[D];長安大學(xué);2010年

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