發(fā)布時間：2019-06-10 03:39

【摘要】：我國公路主要路面結(jié)構(gòu)是半剛性基層瀝青路面。隨著快速發(fā)展的國民經(jīng)濟和日益增長的交通量,大型車輛軸載日益重型化,超載現(xiàn)象越發(fā)嚴重。大量的瀝青混凝土路面面臨著超出設(shè)計軸重的風(fēng)險,使得瀝青路面受到嚴峻考驗,不能滿足交通量的需要。許多道路建成不久,就發(fā)生了路面開裂、高溫車轍變形、水損等早期災(zāi)害。因此,作為地理位置重要和交通繁重的天津地區(qū)高速,如何提高瀝青路面的使用壽命,減少車轍的產(chǎn)生,已經(jīng)成為眾多道路工作者所面臨的重大課題。車轍是各地常見的一種路面病害,它的產(chǎn)生有很多原因,不僅與路面結(jié)構(gòu)、集料的性質(zhì)、瀝青混合料的強度和抗變形能力有關(guān),還與道路交通荷載、路面溫度、剪應(yīng)力等因素密切相關(guān)。本論文以津京冀地區(qū)典型路面結(jié)構(gòu)為對象,通過項目現(xiàn)場調(diào)查和評價,主要研究了路面的檢測評定、車轍損壞防治措施、瀝青路面計算參數(shù)及剪應(yīng)力分布規(guī)律,并對典型路面結(jié)構(gòu)建立了有限元模型。利用Abaqus有限元分析軟件分析計算了在連續(xù)變溫下的溫度場,以及分別在標準軸載和重載作用下的剪應(yīng)力和抗剪強度,驗證了路面設(shè)計方案對路面的抗車轍特性的影響。最后,通過對路面設(shè)計方案和檢測結(jié)果的分析,結(jié)合天津地區(qū)瀝青路面的現(xiàn)狀,得出了一些結(jié)論,認為工程的設(shè)計方案合理、有效。為今后的半剛性基層瀝青路面的研究和設(shè)計施工提供參考。
[Abstract]:The main pavement structure of highway in China is semi-rigid base asphalt pavement. With the rapid development of national economy and increasing traffic volume, the axle load of large vehicles is becoming more and more heavy, and the phenomenon of overload is becoming more and more serious. A large number of asphalt concrete pavement is facing the risk of exceeding the design shaft load, which makes the asphalt pavement face a severe test and can not meet the needs of traffic volume. Soon after the completion of many roads, early disasters such as pavement cracking, high temperature rut deformation, water loss and so on have occurred. Therefore, as an important geographical location and heavy traffic in Tianjin, how to improve the service life of asphalt pavement and reduce the occurrence of ruts has become an important issue faced by many road workers. Rut is a common pavement disease in various places, which has many reasons, not only related to pavement structure, aggregate properties, asphalt mixture strength and deformation resistance, but also road traffic load, pavement temperature. Shear stress and other factors are closely related. This paper takes the typical pavement structure in Tianjin-Beijing-Hebei area as the object, through the project site investigation and evaluation, mainly studies the pavement detection and evaluation, rut damage prevention and control measures, asphalt pavement calculation parameters and shear stress distribution law. The finite element model of typical pavement structure is established. The temperature field under continuous temperature variation, shear stress and shear strength under standard axial load and heavy load are analyzed and calculated by Abaqus finite element analysis software, and the influence of pavement design scheme on rut resistance of pavement is verified. Finally, through the analysis of pavement design scheme and test results, combined with the present situation of asphalt pavement in Tianjin area, some conclusions are drawn, and it is considered that the design scheme of the project is reasonable and effective. It provides a reference for the research, design and construction of semi-rigid base asphalt pavement in the future.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.217
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本文編號：2496137