【作者】 石立万；

【导师】 吴瑞麟；

【作者基本信息】 华中科技大学 ， 道路与铁道工程， 2007， 硕士

【摘要】 随着经济的发展,交通量迅速增大,车辆大型化、超载严重、车辆渠道化等问题接踵而来,使沥青路面出现了各种各样的破坏形态,特别是由于夏季“高温”情况下,车辆超载引起的车辙达到了惊人的地步,它不仅直接影响路面平整度和使用性能,而且严重危及行车安全。因此沥青路面的车辙问题,成为一个值得深入研究的课题。本文以华中科技大学道路实验室研制的全厚度车辙试验机为基本试验设备,针对武汉市三环线武黄高速公路共线段和武黄高速公路K27+400~K39+500段所采用的沥青加铺结构进行沥青路面结构全厚度车辙试验,提出全厚度车辙试验操作技术规程要点,对影响沥青路面全厚度车辙动稳定度(DS)、车辙深度(RD)的关键因素(如温度、荷载、路面厚度、静荷载以及轻荷载等)进行了分析与研究。研究成果表明:对于高速公路采用得比较多的三层沥青路面结构,中面层采用改性沥青可以显著提高沥青路面的高温抗车辙能力;车辆自身的荷载(静荷载)对沥青路面车辙有着很大的影响,在0.7MPa的荷载下,由静荷载引起的沥青路面车辙变形约占总变形的25%;温度、荷载和路面厚度对DS和RD影响的显著性顺序为:荷载>温度>路面厚度;当地区温度较高时,原来力学意义上对沥青路面结构设计不构成影响的轻型车(<30KN),对沥青路面车辙的影响相当于标准荷载的60%左右。最后,对研究成果进行了归纳,并对进一步研究方向进行了展望。更多还原

【Abstract】 Along with the development of national economy, there were lots of dilapidations forms on the asphalt roads for the volume of traffic increases rapidly, the channeling running, and overloading seriously, etc.Tracking has got into amazing extent especially which is caused by over loading of vehicles in the condition of summer’s high temperature,it’s not only impact on surface roughness and performance, but also seriously endanger traffic safety.Therefore,asphalt pavement rutting has been a question that is worthy of in-depth studies.The thesis takes the total thickness track testing machine as a basic test equipment which is developed by Huazhong University of Science and Technology Road Laboratory, making total thickness track test on the mutual segment of Wu Huang freeway and the third annular urban road of Wuhan and the segment K27+400~K39+500 of Wu Huang freeway asphalt pavement adopts,advancing total thickness track test operation and technical points of order. the key factors (such as temperature, load levels, road thickness, static load and light-load,etc.) which affect the entire thickness of asphalt pavement rutting dynamic stability (DS) and rut depth (RD) have also been studied.The results in the article indicate that: using modified asphalt in middle layer can significantly increase DS and the ruting resistance ability of asphalt pavement for three-layer asphalt surface structure;vehicles of their own (static load) have great influence on asphalt pavement rutting;in the load 0.7MPa, static loads caused by the deformation of asphalt pavement rutting about 25% of the total deformation;the significance influence on DS and RD of the factors decreased according to the order: load leavel>temperature>road thickness;light vehicles(<30KN) which are ignored in asphalt pavement structure design are equivalent about 60% of the normal-load which impact on asphalt pavement rutting when the temperature is higher.The main conclusions are summarized and the further study’s direction is anticipated at the end of the article.更多还原