CAJ | 학술논문

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.
해상생산적경류필수재고온고압하운수이사류체서완이피면사조분적응고.유우내외압차화온차인기강제팽창도치축향압축력,차시편산생료해저관선적굴곡.차압축력기능인기관선재해상평면내적측향굴곡,야능조성수향굴곡.통상장관선매우구조내종이학보여기타해양활동적간우최소화.재차정황하,측향토약속초과료유관선부중조성적수향륭기약속.인차,요특별주의알구매설관선적수향굴곡.최근대중국고온관선화발해만궤기사고적관주인발중국해양공정사대차현상적강렬흥취.문장종술료해저매설관선수향굴곡적이론연구역사,이급작자대차문제적일사경험.희망해양공정사능종본영역적문헌종술화총결중수익.문중동시연구료관선적방호층설계,최후명학료미래발전적방향.
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 frequently large enough to induce lateral buckling of untrenched pipelines,or vertical buckling of trenched pipelines.The recent growth in interest in high temperature pipelines in China and some failures in Bohai Gulf have led to an explosion of interest in these phenomena for Chinese ocean engineers.This paper describes the history of the theoretical studies on the submarine buried pipeline vertical buckling and the author's experiences with this problem.