应用探地雷达确定复杂条件下管线空间位置

Adopting Ground Penetrating Radar to Determine Spatial Location of Pipelines Under Complex Conditions

某高层住宅楼群管井间楼板层内各种入户管线密集、复杂、走向无规律且存在严重干扰,工程要求在空间狭小且管线密集的管井区域内确定两个直径为7.5cm的可供打孔的安全区域。为实现各种管线的准确定位,制作了室内模型,开展了探地雷达在复杂管线条件下准确定位的可行性试验。选用1.7GHz屏蔽天线在现场进行了大量的测试,共完成484个管井测试,确定钻孔区域968个。探测结果表明,通过探地雷达灰度图可以准确识别出埋设在楼板内部的内径大于2cm的各种不同管线,经钻孔验证,成功率99.48%,取得了较好的工程实效。

There were various kinds dense,complex and irregular pipelines in the tube-wells of some high-rise residential.There was serious interference between them.According to the requirement of the project,it＇s needed to determine two available security regions diameter of 7.5cm in the narrow space of tube-wells,which region can be drilling.To achieve the purpose of accurate positioning the pipeline,authors made the indoor model,launched a feasibility test which used the ground-penetrating radar to accurate position the pipeline in complex conditions.Finally the authors selected 1.7GHz antennas,and did a lot of tests in the scene,completed a total of 484 tube wells tests and determined the 968 drilling regions.Detection results showed that by gray-scale,ground-penetrating radar can accurately identify different pipelines which inside diameter were greater than 2cm buried in the floor.Verified by drilling,the success rate was 99.48%.The project achieved good results.