影响东海海底管道安全的灾害因素

通过多年的海底管道检测成果,分析了东海海区对管道路由存在威胁的灾害因素,认为可以分为人类活动、海流冲刷、浅部地质灾害和砂质底质等;重点探讨了拖痕、海流冲刷、浅层气和砂土液化等灾害因素的致灾机理和致灾结果,目的是加深对这些灾害的认识,以期在今后的检测中能够及时发现存在的安全隐患,并能采取相应的防范措施,确保海底管道的安全运行。

GEOHAZARD FACTORS AND THEIR IMPACT ON SUBMARINE PIPELINE SAFETY IN THE EAST CHINA SEA

The submarine pipeline survey results accumulated in the past years are analyzed for geo- hazard factors in the East China Sea and their threat to the submarine pipelines. Those factors could be divided into different types, such as human activity- induced, current scour, and geological hazard in shallow and sandy sediment. In this paper, we discussed the occurrence and mechanism of those factors with emphasis on anchor drag marks, currents scour, shallow gas and sand liquefaction, etc, so as to further understand the harzards and timely to protect the pipelines from risks.