本文選題：道路交叉口 + 制動　； 參考：《東南大學》2015年碩士論文

【摘要】：目前關于瀝青路面的車轍研究工作有很多,但單獨針對城市道路交叉口的車轍病害研究較少。城市道路交叉口車輛頻繁的制動和啟動,并且伴隨著大量長時間的停車現(xiàn)象,車輛荷載的作用方式與其他路段大為不同,路面病害較之其他路段要嚴重很多。本課題根據(jù)城市道路交叉口實際的交通狀況和荷載作用方式,探索交叉口路面病害的主要原因,并對城市道路交叉口瀝青路面的設計提出一些建議。首先,選取南京市主干道部分交叉口,對交通量、信號配時、主要車型、各車型比例等交通信息進行調(diào)研,并針對南京市道路交叉口的歷史和現(xiàn)狀路面病害進行了調(diào)查。其次,以小轎車和公交車作為研究車型,確定其技術質量參數(shù),根據(jù)車輛制動性能、路面平整狀況和路面摩擦系數(shù),分析車輛的軸載和水平力變化。再次,根據(jù)交叉口荷載特征的特殊性,研究了不同制動條件下的路面結構力學響應,比較交叉口荷載與標準設計荷載力學響應的差異,提出交叉口路面設計應力和應變控制建議。接著,確定路面典型結構和面層級配,并針對中面層提出五種不同的設計方案。介紹了局部三軸試驗的原理,并根據(jù)道路交叉口路面的受力特征,確定瀝青混合料的蠕變方案,比較荷載不同作用方式、不同大小和不同的路面材料在不同溫度下(20℃,40℃,60℃),瀝青混合料的蠕變變形規(guī)律。最后,通過調(diào)查研究,分別確定城市道路與高速公路的表面邊界條件,選擇相同的路面結構和材料,比較二者路面溫度場的差異。運用有限元模擬方法,分析氣候溫度、荷載作用方式、荷載大小和路面材料對車轍變形的影響,并確定車轍增長較快的溫度范圍和各層車轍貢獻比例,并提出控制車轍病害的一些方法,探討了交叉口區(qū)域以車轍變形為依據(jù)的軸載換算方法。
[Abstract]:At present, there are a lot of researches on rutting of asphalt pavement, but there are few researches on rutting diseases of urban road intersections alone. With the frequent braking and starting of vehicles in urban road intersections, and accompanied by a large number of parking phenomena for a long time, the action of vehicle loads is very different from that of other sections, and the road surface diseases are much more serious than other sections. According to the actual traffic situation and load mode of urban road intersection, the main causes of pavement disease are explored, and some suggestions are put forward for the design of asphalt pavement in urban road intersection. Firstly, the traffic information such as traffic volume, signal timing, main vehicle type and proportion of each type are investigated by selecting some intersections of the main road in Nanjing, and the road diseases in history and present situation of the intersection in Nanjing are investigated. Secondly, taking the car and bus as the research vehicle, the technical quality parameters are determined. According to the braking performance of the vehicle, the pavement leveling condition and the friction coefficient of the road surface, the change of the axle load and the horizontal force of the vehicle is analyzed. Thirdly, according to the particularity of intersection load characteristics, the mechanical response of pavement structure under different braking conditions is studied, and the difference between intersection load and standard design load mechanical response is compared. The control suggestion of stress and strain in intersection pavement design is put forward. Then, the typical pavement structure and surface layer grading are determined, and five different design schemes are proposed for the middle surface layer. This paper introduces the principle of local triaxial test, determines the creep scheme of asphalt mixture according to the stress characteristics of road surface at road intersection, and compares the different action modes of load. The creep deformation law of asphalt mixture is obtained with different sizes and different pavement materials at different temperatures (20 鈩，

本文編號：2092140