海底埋设管线屈曲剧变理论研究综述

海上生产的烃类必须在高温高压下运输以使流体舒缓而避免蜡组分的凝固。由于内外压差和温差引起强制膨胀导致轴向压缩力,此时便产生了海底管线的屈曲。此压缩力既能引起管线在海床平面内的侧向屈曲,也能造成垂向屈曲。通常将管线埋于沟槽内从而确保与其它海洋活动的干扰最小化。在此情况下,侧向土约束超过了由管线浮重造成的垂向隆起约束。因此,要特别注意挖沟埋设管线的垂向屈曲。最近对中国高温管线和渤海湾几起事故的关注引发中国海洋工程师对此现象的强烈兴趣。文章综述了海底埋设管线垂向屈曲的理论研究历史,以及作者对此问题的一些经验。希望海洋工程师能从本领域的文献综述和总结中受益。文中同时研究了管线的防护层设计,最后明确了未来发展的方向。

Overview of Upheaval Buckling Theoretical Studies for Submarine Buried Pipeline

Pipelines constitute a vital means of transporting and distributing liquids and gases such as oil,gas and water over large geographical areas.A pipeline containing hot oil(and possibly insulated in order to prevent the solidification of wax in the pipe) will expand longitudinally on account of the rise in temperature;and if such expansion is resisted,for example by frictional affects over a kilometer or so of pipeline;compressive axial stress will be set up in the pipe-wall.The compressive forces are freque...