船舶锚泊活动对海底管道埋深的影响

海底油气管道保护是管道工程领域的重点工作,在沿海特别是海上交通密集区域,船舶的锚泊活动是引起管道事故的重要因素。为了有效防范管道被船锚破坏,需要综合分析船锚在海底的入土深度,确定一个合理的埋深值。对比了国内外关于海底管道埋深的不同标准,分析了船舶锚泊活动可能对海底管道造成损害的类型,从抛锚情况下锚触底后的贯穿量和拖锚情况下锚爪能够啮入海底的最大深度两方面分析了锚泊活动与海底管道埋深的关系。结合国外规定的埋深值,建议沿海船舶交通密集区域海底管道较为合理的埋深值为1.5～2 m。(图2,表4,参21)

The effect of anchoring activity on the burial depth of submarine pipeline

The protection of submarine pipelines has always been the key point in the pipeline engineering. In the offshore waters, especially in the maritime traffic-intensive waters, the anchoring activities of ships have always been an important factor leading to pipeline incidents. A reasonable value of burial depth should be proposed by comprehensively analyzing the embedded depth of the anchor in the seabed, so as to effectively avoid the damage to the pipelines by the anchors. Domestic and foreign standards on the burial depth of submarine pipeline were compared, and the types of the possible damage to submarine pipelines by anchoring activities were analyzed. Then, the relationships between the anchoring activities of ships and the burial depth of submarine pipeline were analyzed from two aspects, i.e., the penetrating depth after the anchor hits the seabed during the anchoring and the maximum depth that the anchor fluke can run into the seabed while dragging the anchor.Based on the burial depths in foreign standards, it is suggested that a more reasonable burial depth of submarine pipeline is1.5-2 m in the maritime traffic-intensive waters.