隧道衬砌质量地质雷达检测研究

采用地质雷达检测的方法可以对隧道衬砌混凝土的厚度，密实性，脱空，钢格栅数量等进行快速检测，这种检测方法不仅克服了目测不准确及打孔抽查检测不全面的缺点，而且以其高分辨率，高准确性，探测快速及无损检测的优，点，在隧道衬砌质量检测中取得了非常明显的效果，并得到了广泛的应用。地质雷达在隧道检测中所暴露的技术问题也亟待解决。本文介绍了地质雷达在隧道衬砌质量检测中的实际应用，研究了在不同的隧道衬砌设计条件下的雷达探测方式，雷达天线频率的选择、参数选择和检测成果。

A Study of the Tunnel Lining Quality Testing by Using the Ground Penetrating Radar

The ground penetrating radar(GPR)has been used in fast testing of the tunnel lining quality includ- ing thickness,consistency,interspace and number of steel bars.The technique has not only overcome the shortcomings of the inaccurate estimation of the distance with eyes and the incomplete spot checks of drilling, but also has yielded remarkable results,showing its advantages such as high resolution,high accuracy,fast detection and non-destructive testing,and has been widely used.However,the technical problems exposed in the tunnel testing also need a prompt resolution.This paper illustrates the practical applications of the GPR to tunnel lining quality testing,discusses the testing modes of the GPR of different designs,selection of the antenna frequencies and parameters,and the testing results.