微表处预防性养护技术在某高速公路的应用和效果评价

发布时间：2018-01-12 05:08

本文关键词：微表处预防性养护技术在某高速公路的应用和效果评价　出处：《兰州大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着公路交通运输事业的发展,甘肃省高速公路里程不断增长,交通量和轴载也与日俱增。一些沥青路面接连发生各类病害,使得路段难堪重负,严重影响了交通运输业的发展和人员、车辆的安全,急需对这些沥青路面进行养护,即进行预防性养护、矫正型养护、路面翻修及重建等。其中,预防性养护技术是对尚未观察到的损害或者存在细微损害的道路主动采取微表处、超薄磨耗层、SMA罩面、雾封层、碎石封层和就地热再生等养护措施,从而达到预防病害目的的一种重要养护方式。微表处具有耐磨、抗滑、防水、平整等特点,可以在短时间内快速开放交通,能够有效地延长路面的使用寿命,被广泛应用在沥青路面的日常养护中。本文以国内外相关研究为参照,以对甘肃省境内某高速公路常见病害进行的实地调查为依据,首先分析了产生沥青路面车辙、龟裂、纵向裂缝、水损坏等典型早期病害的原因(包括交通量急剧增长、超载超限严重、环境影响和排水设施不完善等外部因素)。同时,研究确定了微表处施工所采用的基质沥青、改性剂、乳化剂、稳定剂等原材料,介绍了改性乳化沥青的制备、混合料配合比设计、施工工艺等,进而探讨微表处预防性养护技术在该高速公路上的应用。其次,本文对实施微表处路段2011-2013年路面状况指数、平整度指数和抗滑系数进行了统计,分析对比微表处实施后2011-2013年路面状况指数、平整度指数和抗滑系数的变化趋势,并对不同路面病害类型使用微表处后的效果进行了评价。最后,论文归纳总结了某高速公路已有的预防性养护技术(包括微表处、超薄磨耗层、沥青玛蹄脂碎石罩面、雾封层)的适用范围、效果和优缺点,为后期某高速公路选择预防性养护措施提供理论依据。研究结论：1.重载交通已经成为沥青路面各类病害频发的直接原因。2.选用SK90号基质沥青、SBS改性剂、2：1比例的复配型乳化剂、3：1比例的复配型稳定剂,调节pH值在5-6之间的改性乳化沥青,能够有效地提高微表处的应用效果。3.经过微表处处理过路段的路况质量、平整度和抗滑性能有很大提高。
[Abstract]:With the development of highway transportation, the mileage of highway in Gansu province is increasing, and the traffic volume and axle load are also increasing. Seriously affected the development of transportation and personnel, vehicle safety, urgent need for these asphalt pavement maintenance, that is, preventive maintenance, corrective maintenance, pavement renovation and reconstruction, and so on. Preventive maintenance technology is the active use of micro-surfacing, ultra-thin wear layer, SMA overlay, mist seal layer, gravel seal layer and geothermal regeneration measures for roads that have not been observed or have slight damage. The micro-surface has the characteristics of wear-resisting, skid resistance, waterproofing and leveling, which can open the traffic quickly in a short time, and can effectively prolong the service life of the road surface. It is widely used in the daily maintenance of asphalt pavement. This paper is based on the reference of domestic and foreign research and field investigation of common diseases of a highway in Gansu Province. Firstly, the causes of typical early diseases, such as rutting, crack, longitudinal crack, water damage and so on, are analyzed (including rapid increase of traffic volume and serious overload and overloading). At the same time, the raw materials, such as matrix asphalt, modifier, emulsifier, stabilizer and so on, used in the construction of microsurfacing were studied and the preparation of modified emulsified asphalt was introduced. Mixture mix design, construction technology and so on, and then discusses the application of microsurfacing preventive maintenance technology on the highway. Secondly, this paper implements the micro-surfacing section 2011-2013 road condition index. The smoothness index and skid resistance coefficient are analyzed and compared with the trend of change of pavement condition index, smoothness index and anti-skid coefficient in 2011-2013 after the implementation of micro-surfacing. Finally, the paper summarizes the existing preventive maintenance technology (including micro-surfacing, ultra-thin wear layer) of a highway. The application range, effect, advantages and disadvantages of asphalt mastic macadam cover and fog seal layer. Research conclusion: 1. Heavy haul traffic has become the direct cause of various kinds of asphalt pavement diseases. 2. Choose SK90 matrix asphalt. SBS modifier 2: 1 compound emulsifier / 3: 1 composite stabilizer to adjust the pH value of modified emulsified asphalt between 5 and 6. It can effectively improve the application effect of microsurfacing. 3. The road condition quality, smoothness and skid resistance of the sections treated with microsurfacing are greatly improved.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U418.6

【参考文献】