锦州9-3油田双沉箱海冰爬升和堆积研究

海洋冰区双结构物的设置,不仅影响该区域的流场,而且影响局地的海冰运动。应用涡极子理论,分析了海上双结构物设置时的流场变异,讨论了海冰对沉箱的破坏作用,研究了双沉箱设置下的海冰爬升和堆积机制。研究发现:(1)当海流流向与双沉箱的中心连线相近时,双沉箱对峙区的流速明显减小;(2)双沉箱外侧区域的海冰爬升和堆积与单沉箱时基本相同,其爬升和堆积与海冰的速度和厚度、天文潮高等有关;(3)双沉箱设置时,对海冰爬升和堆积会起到有效的屏蔽作用,对峙区内的双沉箱顶上不再有海冰堆积。

Study on Ride - Up and Pile - Up of Sea Ice Against Double Upward - Breaking Conical Caissons in JZ9-3 Oil Field

When double caissons are located in ice - covered sea, it will influence not only the current field, but the ice movement. In this paper, employing the theory of Gauge System of Hydrodynamics, the field distortion when the double caissons are located is studied. Besides the failure of the sea ice when interacting with the caisson, the sea ice ride - up and pile- up against double caissons are in detail discussed. It is found: (1) when the current direction is close to that of the line through the two caissons' centers, the current speed within the area between the double caissons apparently decreases; (2) sea ice ride- up and pile - up against the outer side of the caissons are similar to that against single caisson, and sea ice ride- up and pile - up are determined by the sea ice velocity, sea ice thickness, tide and the storm set up; (3) when locate two caissons, the tops of the two caissons in the shield area are no ice covered.