武黄高速公路复合式路面车辙形成机理与处治对策研究

发布时间：2018-05-17 21:08

本文选题：武黄高速公路 + 复合式路面　；参考：《武汉工程大学》2014年硕士论文

【摘要】：公路交通量大幅增加，车辆轴载、胎压显著增大，设计施工不合理导致混凝土路面在使用初期就出现路面损坏、使用性能下降等情况。在混凝土路面上加铺沥青混凝土面层的复合式路面结构形式为解决或缓解混凝土路面早期损坏提供了一种有效的途径和新的思路。但我国对于复合式路面的病害研究还相对较薄弱，本文参考沥青混凝土路面病害研究的基础上，对在混凝土路面上加铺沥青混凝土面层的复合式路面的车辙形成机理及处治对策进行了研究。在武黄高速公路路面车辙检测结果基础上，分析武黄高速公路沥青路面车辙形成机理；抽检施工用的沥青、沥青混合料成品料质量，试验检验各层沥青混合料配合比、路面抗车辙性能和水稳定性，结果显示沥青混合料级配达到要求，但改性沥青质量不稳定，是由于改性沥青在2个拌和楼中储存时间的不同；采用ANSYS软件分析沥青面层应力，实测车辙深度与沥青面层厚度，统计各个断面的交通量，结果表明上面层最易发生车辙，面层厚度不是车辙深度的影响因素，交通量和累计标准轴载过大是车辙产生的主要原因。初步研究了武黄高速公路车辙处治对策，主要包括微表处和Novachip超薄磨耗层养护措施。分别从配合比设计及路用性能试验、施工工艺、试验路段应用成果、经济效益分析四个方面进行研究。结果表明，深度不超过25mm，且长度20～160m的间断性车辙，可直接采取微表处进行养护；沥青面层厚度偏薄引起车辙，伴随横向裂缝，抗滑性能偏低的路段，宜先采用微表处进行车辙填补，，再使用Novachip超薄磨耗层技术；养护施工前应先进行预处理，粘层改性乳化沥青的洒布量应控制在0.8～1.2kg/m2的范围内，沥青混合料摊铺后立即用12～15t双钢轮压路机静态碾压。通过试验路段铺筑，对武黄高速公路沥青路面车辙病害的养护方法和施工工艺进行了探讨。经过多年行车荷载作用，路表无严重车辙和裂缝产生，初步表明微表处和Novachip超薄磨耗层养护技术具有较好的抵抗车辙变形的能力，但试验段长期的使用性能还待更进一步观测。
[Abstract]:The traffic volume of highway increased greatly, the axle load of vehicle and the pressure of tire increased significantly. The unreasonable design and construction resulted in the pavement damage and deterioration of the performance of concrete pavement in the early stage of use. The composite pavement structure with asphalt concrete overlay on concrete pavement provides an effective way and a new way to solve or alleviate the early damage of concrete pavement. However, the research on the disease of composite pavement in our country is relatively weak. The rutting mechanism and treatment measures of composite pavement with asphalt concrete surface are studied. Based on the rutting detection results of Wu-Huang Expressway, this paper analyzes the rutting formation mechanism of asphalt pavement of Wu-Huang Expressway, tests the quality of asphalt and asphalt mixture finished material for construction, tests and tests the mix ratio of asphalt mixture in each layer, and analyzes the rutting mechanism of asphalt pavement in Wu-Huang Expressway. The results of rutting resistance and water stability show that the gradation of asphalt mixture meets the requirements, but the quality of modified asphalt is unstable because of the difference of storage time of modified asphalt in two mixing buildings. The stress of asphalt surface is analyzed by ANSYS software. The measured rutting depth and asphalt surface thickness are measured and traffic volume of each section is counted. The results show that the upper layer is the most prone to rutting, and the surface thickness is not the influence factor of the rutting depth. Excessive traffic volume and accumulated standard axle load are the main causes of rutting. The rutting treatment measures of Wu-Huang Expressway are preliminarily studied, including the maintenance measures of micro-surfacing and Novachip ultra-thin wear layer. The research is carried out from four aspects: mix ratio design, road performance test, construction technology, application results of test section, and economic benefit analysis. The results show that a discontinuous rut with a depth of less than 25mm and a length of 20m or 160m can be maintained directly at the micro-surface, where the thickness of the asphalt surface is too thin to cause rutting, accompanied by transverse cracks, and the slip resistance is low. It is advisable to use micro-surface to fill the rut first, then to use Novachip ultra-thin wear layer technology, to pretreat before maintenance construction, and to control the sprinkling amount of modified emulsified asphalt by clay layer within the range of 0.8~1.2kg/m2. The asphalt mixture is rolled statically with 12 t double-wheel roller immediately after spreading. This paper discusses the maintenance method and construction technology of rutting disease of asphalt pavement in Wu-Huang Expressway by paving test section. After many years of driving load, there are no serious ruts and cracks on the pavement surface. It is preliminarily indicated that the maintenance technology of micro-surfacing and Novachip ultra-thin wear layer has a better ability to resist rutting deformation, but the long-term performance of the test section needs to be further observed.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.68

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