地质雷达方法检测隧道衬砌质量研究

在铁路、公路和电站等项目的建设中,隧道隐蔽工程所占比例较大。为了严格控制隧道的施工质量,检测方法由传统的破检向无损检测转变,并对无损检测的精度要求也越来越高。由于探地雷达技术具有高效率、高分辨率和异常图像直观等突出优点,因此,该方法广泛应用于隧道隐蔽工程的质量检测中。这里从地质雷达方法原理出发,从理论上研究了电磁波在隧道衬砌内的传播规律、反射能力和基本雷达图像特征,并结合工程实例,总结了正确判识各类雷达异常的经验,提出了常用的反演计算方法。

An application study of ground penetraction radar for the quality evaluation of the tunnel

In the construction of the railway, highway and hydropower station etc., there are often many the tunnel projects. In order to improve the quality of the tunnel-engineering, the evaluation method on the quality of the tunnels is change from destroy the way to undestroy. As the technology of ground penetration radar(GPR) as an undestroy one has many virtues such as high efficiency and resolving power, and the image is easy for interpretation, thus, it is wide applied to the evaluation of the tunnel quality. In the paper, we not only introduce the principium of GPR, but also analyze the electromagnetic wave propagation of the GPR in the tunnel buildwall, the energy of reflection and the basic character of radar image. With some examples, we summed up experiences how to differentiate the unusual of the GPR image, and present an effective method of inversion computation.