摘要
非开挖混凝土管线由于无电磁信号,往往使常用的感应类管线探测仪“失效”,使得这类管线成为大家较难准确定位的管线。探地雷达因方便移动、能够连续测量,实时成像,往往成为快速扫面的常用方法,笔者研究了地质雷达探测管线的地球物理前提条件,就地质雷达在管线探测领域开展了较深入的探讨。本文尝试采用探地雷达扫面来圈定异常,利用孔中磁法在异常区进行验证,得到了较好的效果。
The non-excavation precast concrete pipelines often cause the commonly used inductive pipeline detectors to“fail”due to the absence of electromagnetic signals,making such pipelines more difficult to accurately position the pipeline.Ground penetrating radar is a commonly used method for fast scanning because it is easy to move and can continuously measure and real-time imaging,however,ground penetrating radar as an indirect means is determinate anomaly to be verified.Magnetic gradient detection technology captures weak magnetic anomalies induced by reinforcing cages in precast concrete pipelines using high-precision magnetometers,in order to locate the target.This paper attempts to use the ground penetrating radar scanning surface to delineate the anomaly,and combines the magnetic gradient technology to detect the magnetic gradient in the anomaly zone,and accurately obtains the planar position and depth of the buried concrete pipeline.
作者
孙士辉
潘喜峰
Sun Shihui;Pan Xifeng(Tianjin Institute of Geotechnical Investigation,TianJin 300191,China)
出处
《城市勘测》
2019年第S01期248-250,共3页
Urban Geotechnical Investigation & Surveying
关键词
探地雷达
深埋
预制混凝土管道
Comprehensive Geophysical Exploration
GPR
magnetic gradient
precast concrete pipes
