城市地下管线高精度电磁法探测技术

开展城市地下管线高精度探测技术研究 ,不仅可减少地下管线工程破坏事故 ,而且也是建立城市地下综合管线数据库的基础。本文通过对电磁系统内部耦合关系及互感系数的论述 ,基于信噪比理论 ,提出了提高电磁法地下管线探测精度的技术对策 ;针对不同干扰因素 ,分别给出了病态信号剔除方案 ;并利用四个典型实例验证了理论分析的正确性和工程实用性。

High-accurary EM Probing Techniques in City Underground Pipline Location

Improving the accuracy of underground pipeline probing is important. It not only can decrease misdoing in the underground pipeline engineering, but also help build compositive pipeline data-base. This paper discussed the inner coupling and coefficient of mutual induction of electromagnetic system. Based on signal-to-noise theory some technology measures to improve the accuracy of underground pipeline probing in electromagnetic method are suggested here. Programs are given to strip ill-condition signals for different noises and four typical case histories proved correctitude and engineering practicability of the theory.