摘要
随着城市的建设和发展,埋地管线的种类和数量迅速增多,相应地也出现了涉及地下管线安全运行的各种腐蚀问题。因此开展埋地管道防腐层的非开挖检测非常必要。本文简要介绍了埋地管道非开挖检测常用的方法,然后具体围绕交流电流衰减法(PCM)的工作原理、检测前的准备展开讨论,并且以北京某地区的天然气埋地管道非开挖检测工作为例,介绍一则应用交流电流衰减法(PCM)进行埋地管道防腐层检测的工程实例,根据检测数据和管中电流随测量距离的变化曲线进行分析,确定了破损点的位置,并进行了开挖验证,将评价结果和开挖检测结果做了比较。之后指出了应用该法的局限性并提出相关建议。最后对未来的检测方法进行了展望。
As the city construction and development, type and quantity of buried pipeline is increasing rapidly, accordingly also appeared in various corrosion problem relates to the safe operation of underground pipeline. Therefore, development of trenchless detection anticorrosion layer of buried pipeline is very necessary. This paper briefly introduces the buried pipeline trenchless detection methods, and then specifically on alternating current attenuation method （PCM） of the working principle, test preparation are discussed, and to the underground natural gas pipeline trenchless detection in a certain area in Beijing as an example, introduces a application of AC current attenuation method （PCM） for detection of buried pipeline anticorrosion layer engineering example, according to the current detection data and the pipe with the variation curve of distance measurement are analyzed, to determine the damage location, and the excavation of verification, will do by comparing the results of test results and excavation. Then point out the limitations of the application of the proposed method and related suggestions. The detection method of future. Anticorrosion layer of buried pipelines
出处
《城市燃气》
2013年第10期21-25,共5页
Urban Gas
