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1 概述城市埋地燃气管道是能源通道,与城市供电系统、供水管道网和交通道路一起构成了现代城市不可缺少的公共基础设施。目前,埋在城市地下的燃气管道大多已经使用了10～30年,个别已经超过了30年的服役期,至今仍在继续使用。由于埋地管道在土壤和燃气杂质的联合腐蚀作用下有一个寿命衰减的过程,加上城市发展建设活动对已经建设的埋地管道的侵扰,使得这些输送易燃易爆介质的压力管道随时都有发生泄漏、爆炸等事故的可能。本文
1 Overview Buried gas pipelines in urban areas are energy access roads that, together with urban power supply systems, water supply pipe networks and traffic roads, form the indispensable public infrastructure for modern cities. At present, most of the gas pipelines buried underground in cities have been in use for 10 to 30 years, and some have been in service for more than 30 years and are still in use today. Due to the decay of the life of the buried pipe under the combined corrosion of soil and gas impurities, and the intrusion of the urban development and construction activities into the buried pipe that has been constructed, the pressure pipes for transporting the inflammable and explosive medium are always available A leak, explosion and other accidents may occur. This article