摘要
燃气管道敷设基础资料的缺失给然气管道养护修复及附近地下基建(管道、管廊、地下街等)方案的设计和施工带来极大障碍。物探方法可用于管道定位、定深探查,但随着目标管道埋深的增大,常规物探方法的定位偏差尤其是定深偏差显著增大,往往不能满足施工设计的需求。在对多种物探方法特点分析的基础上,结合燃气管道特性,从观测系统及探测装置出发,将钻孔瞬变电磁法与跨孔电阻率法CT应用于大埋深燃气管道深度探查,工程实践证明上述两种物探方法均能对目标管道实现精确定深。
It’s barrier to gas pipeline maintenance and underground construction design for the lost of gas pipeline foundation information.Geophysical exploration method is often used for pipeline location and depth exploration.With the increase of detection depth,the horizontal positioning error of conventional geophysical prospecting method is not obvious,but the vertical depth error is increasing rapidly.In this paper,through the analysis of the characteristics of various geophysical exploration methods,combined with the characteristics of gas pipeline,from the observation system and the detecting device,the borehole transient electromagnetic method and cross hole electrical method CT are applied to deep exploration of deep buried gas pipeline.Practice has proved that both the borehole transient electromagnetic method and the cross hole electrical method CT can detect the depth of the deep buried gas pipeline accurately.
作者
余森林
刘文伍
鞠建荣
田庆福
Yu Senlin;Liu Wenwu;Ju Jianrong;Tian Qingfu(Nanjing Institute of Surveying,Mapping & Geotechnical Investigation Co.,Ltd,Nanjing 210019,China)
出处
《城市勘测》
2018年第A01期192-195,共4页
Urban Geotechnical Investigation & Surveying
关键词
大埋深
然气管道
钻孔瞬变电磁
跨孔电阻率法CT
精确定深
Deep buried depth
Gas pipeline
Borehole transient electromagnetic
Cross hole resistivity method CT
Precise depth detection
作者简介
余森林(1989—),男,硕士,助理工程师,主要从事疑难管线及道路病害探测等城市工程物工作。
