【作者】 王文强；

【导师】 张起森； 查旭东；

【作者基本信息】 长沙理工大学 ， 道路与铁道工程， 2004， 硕士

【摘要】 由于连续配筋混凝土路面(CRCP)在我国应用的时间较短,对其长期性能尚缺乏研究,国外实践表明,裂缝宽度是影响CRCP长期性能的关键,因此,对裂缝宽度的研究具有十分重要的理论和实际意义。 当CRCP的裂缝宽度过大时,在环境条件的影响下,裂缝处可能因渗水而锈蚀钢筋,侵蚀基层,且宽的横向裂缝会引起荷载传递损失和裂缝处混凝土剥落,进而导致CRCP面板在车轮荷载作用下容易发生冲断破坏。因此,必须控制裂缝宽度,并长期跟踪观测裂缝宽度的变化,及时对宽度过大的裂缝进行养护维修。由此必须研究一套操作简单且行之有效的CRCP裂缝宽度检测和评价方法。 本文针对CRCP的特点与常规测微镜检测裂缝宽度的困难及裂缝宽度检测的迫切需要,提出了利用计算机图像处理技术进行裂缝图像的采集和分析的方法。在分析介绍数字图像处理基本理论的基础上,根据数码相机拍摄的CRCP裂缝图像,应用图像处理技术,对裂缝宽度尺寸进行检测,提出了检测原理、方法和步骤,并对测量误差进行了分析。同时,运用MATLAB编制了CRCP裂缝图像处理和分析程序,结果表明,该程序操作简单,计算速度快。因此,采用图像处理方法代替常规测微镜检测方法,可大幅度降低人员劳动强度,提高检测和分析效率,并避免影响交通。 根据图像处理方法得到的CRCP裂缝宽度结果,提出了运用可拓方法对CRCP裂缝宽度进行评价,并与统计方法进行对比。评价结果表明,可拓方法比统计方法更可靠、更准确,更能满足CRCP裂缝宽度检测的要求。 总之,本文提出的裂缝宽度的图像处理方法和可拓评价方法对提高CRCP长期性能具有重要的参考价值。更多还原

【Abstract】 Because the applications of Continuously Reinforced Concrete Pavement (CRCP) are relatively short time in our country, the long-term performance of CRCP is lack of study. The overseas experiences show that the crack width is the key factor to influence the long-term performance of CRCP. So it is important to study the crack width.If the crack width of CRCP is too wide, the reinforcing bar and the base will be corroded at the crack due to infiltrating rainwater under the influence of environment. The wider transverse crack will cause the loss of load transfer and the concrete spalling at the crack. Then the punchout of CRCP slab will be easily produced under the load wheel. So it is necessary to control the crack width and trace the change of the crack width for a long time. The pavement should be maintained in time if the crack is too wide. Therefore, it must research the simple and effective method of testing and evaluation.According to the character of CRCP, the testing difficulty of crack width with conventional measuring microscope and the urgent demand of the crack testing, the paper puts forward the method of picking and analyzing the crack image with computer image processing technique. On the basis of introducing and analyzing the theory of the digital image processing, the crack width is tested with image processing technique according to the crack image of digital camera. The principle, method and procedure of the crack testing are put forward, and the testing error is analyzed. At the same time, the image processing method and analyzing program are developed with MATLAB. The results show that the program is simple to operate and fast to compute. Therefore, the image processing method instead of conventional measuring microscope testing method may reduce the labor, enhance efficiency of testing and analyzing, and avoid influencing traffic.The paper puts forward to apply extension method in evaluating the crack width in according with the results of CRCP crack width with image processing, and compare to extension method and statistical method. The results of evaluation show that the extension method is more reliable and accurate than statistical method, and it can meet更多还原