基于地质雷达探测原理，论证地质雷达用于复杂公路管线探测的可行性。针对北京望京地区复杂公路，采用SIR-20型地质雷达对施工面地质情况、管线平面位置和埋深进行实测，探测结果表明：相对介电常数较大的目标体吸收周围介质的电磁波信号；最大反射雷达波强度出现在管线顶部；底部产生的雷达波图像中“弧形”宽度大于顶部。基于以上研究，提出针对复杂公路管线探测的设计方案及事故处理措施，同时结合现场制定地质雷达测试热力管线方案。研究结果验证了利用地质雷达探测热力管线的可行性，为后续安全动态施工设计提供了依据，也为地质雷达在复杂公路管线探测方面积累一定的经验。%Based on test principle of ground penetrating radar ( GPR ) , the application feasibility for detecting the heating pipelines on complex highway is verified .In accordance with the complex highway in Wangjing area of Beijing , by using ground penetrating radar of SIR-20 to monitor the geological situation of construction surface ,the plain position of pipeline and the buried depth ,the detection shows that:the objects of bigger relative dielectric constant absorbs the e-lectromagnetic wave signal from periphery;the maximum intensity of reflection radar wave appears at the top of pipeline;the “arc” width in radar wave image produced by the bottom of pipeline is bigger than the top .Based on these studies , the design program and accident removal countermeasures for the detection of complex highway pipeline are proposed . Meanwhile ,combining with actual measurement in field , contrives scheme utilizing ground penetrating radar to detect heating pipelines .It could be verified the feasibility of testing heating pipelines with ground penetrating radar ,provides a basis for the subsequent security dynamic construction design , and accumulates some experience for ground penetrating radar detecting pipeline on complex highway .
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