探地雷达在黄土地区城市地质管线探测中的应用

The application of geological radar to urban geological pipeline detection in the loess area

使用探地雷达对黄土地区城市多个拟建地铁出站口区域进行地质和地下管线探测,着重研究了黄土区的土层分布情况。结合现场实际情况分析了黄土层中存在的空洞、渗水、土体塌落等情况以及PVC管线和金属管线的探地雷达图像,归纳了在黄土地区地下管线各自的探地雷达扫描图像的特点,总结出在黄土地区应用探地雷达探测城市地质分层和管线的一般性方法和规律,应用“黑—白—黑”与“白—黑—白”的图像规律进行探地雷达图像解析,很好地指导了后续的工程施工。

Geological and underground pipeline detection was carried out in several urban metro exit areas in the loess area by using ground penetrating radar(GPR).The distribution of soil layer in the loess area was emphatically studied.The GPR images of PVC pipelines and metal pipelines in the loess area under the conditions of holes,seepage and soil collapse were analyzed,and the respective GPR scans of underground pipelines in the loess area were summarized.By describing the characteristics of the images,the authors summarized the general analysis methods and rules of applying GPR to detecting urban geological stratification and pipeline radar images in the loess area,and used the image laws of"black-white-black"and"white-black-white"to analyze the GPR images,which provides a good guidance for subsequent engineering construction.