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一、断层区对埋地管道的危害在历次大地震中,埋地管道经常遭到不同程度的破坏。如1976年我国唐山地震,秦皇岛到北京输油管道经过地震区的管段有四处遭受破坏。美、苏、日等国亦均有由于地震而导致埋地管道破坏的记载。国内外震害调查表明:高烈度区的强烈地表震动,是造成地面结构和城市网络中承插式埋地管道破坏的主要原因,但不是埋地油气管道(焊接钢管)招致破坏的主要原因。地震区域的断层地带,对于埋地的焊接钢管却是危险的。例如我国秦京输油管道在
I. Hazards to Buried Pipelines in Fault Zones In previous major earthquakes, buried pipelines were often damaged to varying degrees. For example, in 1976, when the Tangshan earthquake occurred in China, Qinhuangdao and Beijing’s oil pipelines were damaged in four places through the seismic zone. The United States, the Soviet Union, and Japan also have records of the destruction of buried pipelines caused by the earthquake. The investigation of earthquake damage at home and abroad shows that the strong surface vibration in high-intensity areas is the main reason for the destruction of socket-buried buried pipelines in ground structures and urban networks, but it is not the main reason for damage caused by buried oil and gas pipelines (welded steel pipes). Fault zones in seismic regions are dangerous for buried welded steel pipes. For example, China’s Qin Jing pipeline is