橡胶改性沥青在高速公路中的应用研究

结合宁常高速公路大规模橡胶沥青路面的施工实践，介绍了橡胶改性沥青在公路项目上的应用研究，通过其材料与结构特性的分析以及施工的总结，认为废旧轮胎回收利用有效的解决环保问题并促进资源的再生利用，为建设适合我国实际情况的橡胶沥青混凝土路面提供参考。     

浅谈如何预防和减少新修高速公路的路面污染

结合国道主干线GZ40二连浩特至河口陕西境宁强至棋盘关高速公路的建设经验,对新修高速公路的路面污染问题进行了探讨和分析,并提出预防路面污染的措施和建议,解决了新修路面污染问题。     

沥青路面典型预养护技术措施研究

在借鉴国外预养护技术的基础上，根据我国沥青路面的特点和养护技术现状，推荐稀浆封层等7种技术措施作为我国沥青路面典型预养护对策，并就这些措施的技术特点、功能与适用条件进行了深入的分析与系统的总结，从而推广这些预养护技术的应用。     

地源热泵道路融雪热水管可靠性设计研究

介绍了地源热泵(GSHP)技术在道路融雪中的应用,分析融雪热水管常规设计方法的局限性,通过对道路融雪影响因素随机分析,提出热水管可靠性设计方法,得到基于道路体热阻随机性和考虑管长变异性的热水管长设计公式。结合工程案例进行对比分析,研究表明,可靠性分析与设计方法在GSHP道路融雪应用中能够较好地协调经济性和功能性要求。     

沥青路面再生技术浅析

针对传统沥青路面养护方法工作量大、成本高、污染环境等弊端,介绍了国内外沥青路面再生技术的发展及应用,重点阐述了沥青路面再生技术的分类及与传统沥青路面养护方法相比所具有的技术经济优势,以期促进沥青路面再生技术的推广应用。     

改进的基于梯度场Hough变换机场道面地灯检测算法研究

地灯作为机场道面中一种特殊的标志物,影响着道面检测系统对道面的检测.为了识别地灯目标,提出了一种基于梯度场的HOUGH变换圆检测算法,并且在分析了算法原理和应用局限性下,提出了一系列改进方法,引入适当的预处理以及自适应阈值算法来提高识别精度.实验表明,该方法地灯检测正确率能达到95％,基本满足了对道面地灯检测和定位的需要.     

路面病害巡检评估系统中的裂缝检测技术

由于使用手持设备的网络型混凝土路面病害巡检评估系统与车载道路检测系统的病害图片处理方法不同,针对使用手持设备的网络型混凝土路面病害巡检评估系统提出一种基于图像处理的可纠正图像畸变的混凝土路面裂缝检测技术。1)使用张定友法对摄像头进行标定,获得摄像头内外参数;2)对路面病害图像进行预处理;然后,通过阈值分割法检测出路面裂缝,根据背景连通域数量的差异,实现了裂缝分类;通过投影法对出横、纵和斜向裂缝实现分类。3)对线性裂缝提取裂缝骨架细化并根据实际版块长宽,求出裂缝长度、平均宽度等病害参数;对于网状裂缝通过求其最小外接矩形计算其破损面积。     

Issues with Combining Road Elevation Spectral Models and Vehicle Vibration Response to Estimate Vehicle Dynamic Characteristics

The research presented in this paper focuses on issues associated with the development of an experimental technique to estimate the dynamic characteristics of wheeled vehicles (namely, the frequency response function) using only in‐service response data. To validate the approach and eliminate complexities associated with multi‐wheel vehicles, a single‐wheeled prototype vehicle was designed and commissioned. The vertical vibration acceleration of the prototype vehicle's sprung mass was measured during normal operation. The power spectral density function was computed and used to estimate the frequency response function of the vehicle. A number of experiments using various configurations of the single‐wheeled prototype vehicle were undertaken, along with a series of vibration table experiments to provide a comparison with the estimated frequency response functions. The results show that the best estimate of the frequency response function using the vehicle response data provides reasonable agreement with the measured laboratory experiments when the value of the slope of the spectral function is not set to the value suggested by the International Organisation for Standardisation. Another technique was further developed to estimate the value of the pavement spectral slope using only in‐service response data; however, this technique does not yield consistent and accurate estimates. Interestingly, the main resonance of the vehicle is in agreement between the vibration table and response data around the sprung mass of all three vehicle configurations when inspected using linear scales (regardless of the variation in the spectral shape of the excitation), although the additional modes (including the unsprung mass) differs for all vehicles. Copyright © 2014 John Wiley & Sons, Ltd.     

浅谈道路维修技术与方法

现如今,路面的形式不再是以往的单一形式。伴随着道路工程施工技术的不断发展,已经形成了沥青混凝土路面、特殊沥青混凝土路面、水泥混凝土路面等。而路面形式的多样化也带来了相应的问题,即不同的路面会发生不同性质的破损,这就需要我们采取不同的维修方法。