探地雷达在沥青路面检测中的应用研究

发布时间：2018-06-07 08:12

本文选题：探地雷达 + 介电常数　；参考：《长安大学》2014年硕士论文

【摘要】：近些年，随着我国公路建设的迅速发展，对道路的质量要求控制比较严格，而道路质量检测技术也相应的越来越高。在早期，我国的检测技术手段的效率比较低、随机性很大、检测的成本费用较高、检测仪的精确度不高、而且检测机械对路面的损害有一定的影响，具有破坏性等特点。随着检测技术的不断的改进、不断的完善，发明了一种探地雷达（简称GPR）设备，它作为一种现代道路新型检测技术手段，对道路破坏性没有影响。探地雷达主要是通过路面向下发射高频的电磁波，由接收天线接收到返回路面的电磁波，电磁波在地下介质中，以一种电性差异进行接收电磁波的波形、振幅变化情况等特点来推断介质的空间状态和结构形态的一种电磁法探测方法。探地雷达利用其分辨率高和探测的速度之快等功能对所探测的对象进行探测，在很多实际工程中得到了广泛运用，并且取得了良好的成果。本文主要介绍了探地雷达的发展过程、雷达探测的基本原理、路面雷达的系统组成与测量参数的分析。并依据实体工程成渝高速公路，研究了探地雷达在现代道路工程结构中的应用，可以通过以下几个方面来进行研究：（1）简要说明了探地雷达在国内外的发展情况，以及国内外在道路工程中探地雷达的应用现状，从而阐述本文的选题意义以及明确研究的内容。（2）通过了解探地雷达系统的构成部分，和关于探地雷达的基本理论，同时介绍探地雷达的工作原理是通过接收电磁波的波形变化以及振幅的变化情况，通过探地雷达在道路工程中探测性能，以及相应的性能指标。探地雷达经过对测线的布置、采集测定的数据、并对数据进行一定的处理，分析探地雷达的新型检测技术，并进行更深入的分析和研究验证测定数据的处理效果。（3）通过探地雷达对实体道路工程的结构层进行厚度的检测，一般是采用钻芯取样来验证探地雷达测定厚度的精确程度。并且可以通过探地雷达测定的厚度与钻芯的试样进行对比，来判定相应的误差控制范围情况。（4）在道路工程中车辙是一种常见的现象，可以通过探地雷达对路面形成的车辙进行探测研究。可以从路面车辙的深度、长度等几何要素以及车辙形成的影响因素考虑，用探地雷达测定的数据进行相关的有针对性处理。以车辙的几何要素以及探地雷达测定处理后的数据相关联系来对进行车辙类型的判别。本文通过对具体路面形成的车辙断面形态进行研究车辙类型的识别办法。（5）本文通过在成渝高速公路上选取一段试验路段，进行探地雷达对该试验路段的道路质量进行相关的检测研究。结合探地雷达测定的有关数据和试验路段厚度的标定对比，进行检测结果验证。
[Abstract]:In recent years, with the rapid development of highway construction in China, the quality control of the road is relatively strict, and the road quality detection technology is becoming higher and higher. In the early stage, the efficiency of the detection technology in our country is low, the randomness is very large, the cost of the detection is high, the precision of the detector is not high, and the detection machinery has certain influence on the road surface damage, which has the characteristics of destructiveness and so on. With the continuous improvement and perfection of the detection technology, a ground penetrating radar (GPR) equipment has been invented. As a new type of modern road detection technology, it has no influence on the road damage. Ground penetrating radar (GPR) mainly emits high frequency electromagnetic waves downwards through the road surface, and receives the electromagnetic waves returning to the road surface from the receiving antenna. The electromagnetic waves are received in underground media with a kind of electrical difference to receive the waveforms of the electromagnetic waves. An electromagnetic detection method for inferring the spatial state and structural shape of the medium with the characteristics of amplitude variation. Ground penetrating radar (GPR) has been widely used in many practical projects and achieved good results because of its high resolution and high detection speed. This paper mainly introduces the development process of ground penetrating radar, the basic principle of radar detection, the system composition of road surface radar and the analysis of measuring parameters. The application of ground penetrating radar (GPR) in modern road engineering structure is studied based on Chengdu-Chongqing Expressway, which can be studied in the following aspects: 1) the development of GPR at home and abroad and the application status of GPR in road engineering at home and abroad are briefly explained, and the significance of this topic and the content of the research are expounded. (2) by understanding the components of the GPR system and the basic theory of GPR, and introducing the working principle of GPR, the variation of waveform and amplitude of GPR is introduced. The detection performance of ground penetrating radar in road engineering and the corresponding performance index are discussed. The new detection technology of GPR is analyzed through the arrangement of the measuring lines, the collection of the measured data, and the processing of the data, and the processing effect of the measured data is verified by more in-depth analysis and research. (3) the thickness of structure layer of solid road engineering is detected by ground penetrating radar (GPR). Generally, the accuracy of GPR thickness measurement is verified by drilling core sampling. The error control range can be determined by comparing the thickness measured by ground penetrating radar with the sample of drill core. Rutting is a common phenomenon in road engineering, which can be detected by ground penetrating radar. Considering the geometric factors such as the depth and length of the rut and the influence factors of rut formation, we can use the data measured by the ground penetrating radar to deal with the relevant pertinence. Based on the geometric elements of rut and the data correlation after ground penetrating radar (GPR) determination and processing, the rut type is distinguished. In this paper, the identification method of rut type is studied through the rutting section shape of concrete pavement. In this paper, a section of experimental section is selected on Chengdu-Chongqing Expressway, and the road quality of the experimental section is detected by ground penetrating Radar (GPR). Based on the comparison of the data measured by GPR and the thickness of the test section, the test results are verified.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217

【参考文献】