综合物探方法在城市地下深埋管线探测中的应用研究

Application of Comprehensive Geophysical Prospecting Method in the Detection of Urban Deep Underground Pipelines

深埋管线的精细化地球物理探测一直是地下障碍物探测领域的重难点,而传统电磁类物探方法的在城市环境中的探测精度往往差强人意,受限于工程地质条件、城市复杂的电干扰环境以及探测方法的适用性等因素。结合上海地下深埋管线探测工程实例,以高密度电阻率法、微动勘探法和井中磁梯度法等综合物探技术进行了联合探测,对各方法圈定的物性异常相互对比验证,异常解释在平面位置和埋深等方面与实际管线埋设对应效果明显,为类似城市深埋管线探测提供技术参考。

The refined geophysical detection of deep buried pipelines has always been a key and difficult point in the field of underground obstacle detection.The detection accuracy of traditional electromagnetic geophysical methods in urban environment is often unsatisfactory,which is limited by factors such as engineering geological conditions,urban complex geoelectric interference environment,and the applicability of detection methods.Combined with the engineering example of Shanghai underground deep buried pipeline detection project,high-density resistivity method and integrated geophysical prospecting technologies such as micro-motion exploration method and borehole magnetic gradient method are used for joint detection,and the physical property anomalies delineated by each method are compared and verified with each other.The anomaly interpretation has obvious corresponding effect with the actual pipeline burial in terms of plane position and burial depth,which provides technical reference for the exploration of similar urban deep buried pipelines.