發(fā)布時間：2019-07-03 10:26

【摘要】：隨著我國經(jīng)濟飛速發(fā)展，交通量和車輛軸載迅速增加，路面狀況越來越復(fù)雜。在高等級路面中，尤其是瀝青路面往往沒達到設(shè)計壽命就出現(xiàn)了永久性變形。研究瀝青路面永久性變形的意義在于，不僅是瀝青混合料配合比設(shè)計的重要依據(jù)，還可以了解使用期內(nèi)的瀝青路面的損壞發(fā)展情況，為日后的路面維修和養(yǎng)護提供參考。這樣可以有效的控制瀝青路面的車轍深度，提高路面服務(wù)性能，為便捷、通暢、安全行車提供保證，促進經(jīng)濟的飛速發(fā)展。并且能夠延長瀝青路面的使用壽命，節(jié)省養(yǎng)護維修費用。 本文以渝黔高速公路的永久性變形病害數(shù)據(jù)為依托，結(jié)合BISAR軟件對瀝青路面中剪應(yīng)力的分布狀態(tài)作了較深入系統(tǒng)的研究。通過渝黔高速病害資料和路面受力分析發(fā)現(xiàn)，，縱坡路段的永久性變形程度比水平路面要嚴(yán)重很多。得出了永久性變形與行車速度、道路坡度以及車輛載重情況的關(guān)系。為研究瀝青混合料的材料特性，從永久性變形的影響因素和不同類型車轍的特征入手。得出了瀝青路面永久性變形發(fā)展機理的四個方面：結(jié)構(gòu)破壞、繼續(xù)壓密、剪切流動、磨耗。利用BISAR3.0軟件對瀝青路面在不同水平力系數(shù)和不同層間狀態(tài)條件下的剪應(yīng)力進行了分析計算。得到了水平力系數(shù)變化對瀝青路面內(nèi)剪應(yīng)力的干涉范圍；車輛荷載作用位置對剪應(yīng)力的影響；層間狀態(tài)不同時剪應(yīng)力的分布規(guī)律。這些都對防治永久性變形提供了依據(jù)。通過病害數(shù)據(jù)和數(shù)值分析，基本得出了瀝青路面永久性變形的發(fā)展機理。與此同時，對瀝青路面永久性變形防治措施也作了探討。通過材料、施工、管理多方面，對瀝青道路的施工起到一定的指導(dǎo)作用。
[Abstract]:With the rapid development of economy in our country, the traffic volume and vehicle axle load increase rapidly, and the pavement condition is becoming more and more complex. In high grade pavement, especially asphalt pavement, permanent deformation occurs when it does not reach the design life. The significance of studying permanent deformation of asphalt pavement is not only an important basis for mix design of asphalt mixture, but also an understanding of the damage and development of asphalt pavement during its service life, so as to provide reference for pavement maintenance and maintenance in the future. This can effectively control the rut depth of asphalt pavement, improve pavement service performance, provide guarantee for convenient, smooth and safe driving, and promote the rapid development of economy. And can prolong the service life of asphalt pavement, save maintenance costs. In this paper, based on the permanent deformation disease data of Chongqing-Guizhou Expressway, the distribution of shear stress in asphalt pavement is studied deeply and systematically with BISAR software. Through the data of Chongqing-Guizhou highway disease and the analysis of pavement force, it is found that the permanent deformation degree of longitudinal slope section is much more serious than that of horizontal pavement. The relationship between permanent deformation and driving speed, road slope and vehicle load is obtained. In order to study the material characteristics of asphalt mixture, the influencing factors of permanent deformation and the characteristics of different types of ruts are studied. Four aspects of permanent deformation development mechanism of asphalt pavement are obtained: structural failure, continuous compaction, shear flow and wear. The shear stress of asphalt pavement under different horizontal force coefficients and different interlaminar conditions is analyzed and calculated by using BISAR3.0 software. The interference range of horizontal force coefficient on shear stress in asphalt pavement, the influence of vehicle load position on shear stress and the distribution of shear stress in different interlaminar states are obtained. All these provide a basis for the prevention and control of permanent deformation. Through disease data and numerical analysis, the development mechanism of permanent deformation of asphalt pavement is obtained. At the same time, the prevention and control measures of permanent deformation of asphalt pavement are also discussed. Through material, construction and management, it plays a certain guiding role in the construction of asphalt road.
【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

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