锦州9—3单沉箱的海冰爬升和堆积研究:Ⅱ.个例分析  

Sea Ice Ride-Up and Pile Against Single Upward-Breaking Conical Caisson in JZ 9 -3 Oil Field: Ⅱ. Case Analysis

作　　者：王可光[1] 吴辉碇[1] 刘良坤 

机构地区：[1]国家海洋环境预报中心,北京l00081 [2]渤海公司工程部,天津塘沽300452

出　　处：《中国海上油气（工程）》1999年第3期31-34,共4页China Offshore Oil and Gas

基　　金：国家自然科学基金(49576272)

摘　　要：利用1996年1月和1997年1、2月份的观测责料对海冰相对于沉箱的爬升和堆积模式进行了校验研究。主要结果如下:(1)沉箱海冰爬升的主要贡献,来源于海冰所具有的动能和潮汐运动时引起的海平面抬升。海冰爬高与潮汐引起的海面高度变化成正比,与海冰初速的0.5次方成正比。(2)通过对几次观测资料的分析发现,在渤海海域,当海冰厚度小于10 cm时,海冰不发生相对于沉箱的爬升和堆积。(3)在渤海海域,随海流和风速的大小和方向的变化,海冰运动的方向可以达到任何方位,故此海冰能够在沉箱的任何方向上产生爬升,从而在该方向上产生堆积。(4)据观测和计算,海冰在沉箱上的堆积具有自身屏蔽作用,即海冰通常只堆积在沉箱的四周。Caisson has many advantages over traditional platforms in resisting ice loads during offshore activities, but it will still face crisis when it is piled with ice severely. In this paper, ride - up and pile of sea ice against offshore conical structures are studied quantitatively. The main contribution of ride - up from wind, current, tide and wave et al, is discussed one after another. It is found: (1) The velocity of ice is a very important factor, which is the main reason why the pile - height is so different on the caisson top surface. (2) When the thickness of the sea ice is so small as to be less than 10 cm, it will bypass the caisson without any riding - up and piling. (3) In JZ 9 - 3 region, the direction of sea ice movement changes along an ellipse with a period about 12 hours, which helps get the result that sea ice can ride up the caisson in every direction but only in a short time every time. (4) The sea ice on the caisson is only located on the surroundings, and leaves open in the place of the caisson center.

关 键 词：海冰 沉箱 爬升 堆积 海上油气田 模式 

分 类 号：TE531.9[石油与天然气工程—油气田开发工程] TU753.61[建筑科学—建筑技术科学]