海底管道悬空防护与治理措施浅谈

发布时间：2018-04-01 03:18

本文选题：海底管道　切入点：埋藏状态　出处：《海洋科学》2016年11期

【摘要】：为了治理一直困扰茂名30万t单点码头的海底管道悬空问题,首先分析了海底管道埋藏状态的识别方法,对国内外海底管线各种悬空治理措施的优缺点和适宜海域进行汇总。在对茂名30万t单点码头海底管道开展了多次路由调查的基础上,针对悬空路段,分别采用人工海草、沉排、碎石回填等不同的防护措施。结果表明,人工海草确实具有明显的降低流速和促进泥沙淤积的功能,但潜水员水下作业工作量较大,不宜在水深大于40 m的海域进行,应避开拖网捕捞海域。水泥沉排在水下较稳定,可有效保护海底管线免受外来损害,但是回淤促淤缓慢。当海床承载力足够时,采用碎石回填办法进行海管维护比较有效,冲刷坑填埋充实,可广泛用于修正悬空。
[Abstract]:In order to solve the problem of submarine pipeline suspension which has been puzzling Maoming 300000 t single point wharf, this paper first analyzes the method of identifying the buried state of submarine pipeline. This paper summarizes the advantages and disadvantages of various suspended measures for submarine pipelines at home and abroad and the suitable sea areas. On the basis of many route investigations on the submarine pipelines of Maoming 300000 t single point wharf, artificial seaweed is used separately for the suspended sections. The results show that artificial seagrass does have the functions of reducing velocity of flow and promoting silt deposition, but the work of divers under water is too heavy to be carried out in the sea area where the depth of water is more than 40 m. The trawling area should be avoided. Cement sinking is more stable under water and can effectively protect submarine pipelines from external damage, but siltation and siltation is slow. When the bearing capacity of seabed is sufficient, it is more effective to use gravel backfill method for sea pipe maintenance. The scour pit is full of landfills and can be widely used to correct suspension.
【作者单位】：中国科学院海洋研究所中国科学院海洋地质与环境重点实验室;青岛海洋科学与技术国家实验室海洋地质与环境功能实验室;深圳中海油服深水技术有限公司;
【基金】：国家自然科学基金面上项目(41576056) 中国科学院战略性先导科技专项(XDA11030301)~~
【分类号】：P756.2

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