探地雷达在土地整治道路工程验收中的应用研究

Study on Application of Groundpenetrating Radar in the Acceptance of Land Consolidation Road Engineering

摘要:

道路验收工作中，厚度、压实度等工程参数常常是验收工作中的重要指标，基于探地雷达的道路工程质量检测技术在土地整治项目区的道路验收中可以达到无损、快速和准确。研究采用pulse EKKO PRO 1000型探地雷达,使用剖面法对道路工程混凝土路面进行雷达探测，结合现场钻孔取心进行电磁波速度修正，经过校正、增益、背景去噪、反褶积等多项预处理，有效抑制噪声，提高分辨力，最后根据相应的电磁波传播速度值完成厚度分析工作，获得不同设计标准的道路工程面层与基层的厚度结构与路面的均匀度情况。结果表明，探地雷达对道路厚度结构探测最大相对误差不超过1.43%，标准差介于0.08~0.66之间，可见其准确度超越了传统方法，精度可靠；经处理后雷达图像清晰，可同步了解道路面层与基层的介质均匀度情况，其中面层厚度起伏不大，个别路段基层压实不充分，厚度不均。符合设计标准与验收要求，为土地整治道路工程的验收与质量评价工作提供有效的帮助。

Abstract:

In the process of checking and accepting a road project, the engineering parameters, such as thickness and compaction are often the critical deciding factors. The road engineering quality inspection technology which is based on the ground penetrating radar can be lossless, rapid and accurate in the land remediation project area. With the help of pulse EKKO PRO 1000 groundpenetrating radar, the section method can be used to carry out radar detection on concrete pavement of a road project. After correction, path gain, background denoising, deconvolution and other presteps, image noise can be effectively get rid of and image resolution can be improved. At length, the thickness can be analyzed according to the electromagnetic wave propagation speed, so as to know about the thickness of road surface and base, as well as the uniformity of the road. It is showed ground penetrating radar has a maximum relative error of below 1.43% when detecting the thickness and the standard deviation is 0.08~0.66. Accordingly, it is more accurate than traditional method and its accuracy is authentic. The refined picture of the radar is clear, and the uniformity of road surface and base can be known. The surface thickness is stable and the base of some roads is not so well compacted has uneven thickness. When the road project can meet the design standards and acceptance requirements. It can provide some references for the acceptance and the quality evaluation of road projects.