非开挖施工技术应用于供水管道穿越障碍已成常态,针对在已投入使用的拉管管道工程中,发现公称外径(dn)在630以上的管道易发生法兰接头与管身拉断的事件。为之,就此对管道接头断裂原因进行分析。并提出相应的应对措施和方法,以避免类似事件的发生。 Trenchless construction technology applied to the water supply pipeline crossing obstacles has become the norm. In the pipeline project has been put into use, it is found that the nominal outside diameter (dn) of more than 630 pipes prone to flange joints and the body pulled off event. To this end, analysis of the causes of pipe joints fracture. And put forward the corresponding countermeasures and methods to avoid the occurrence of similar incidents.