摘要
调查分析了仿生草防护技术研究现状,参照中石油辽河油田海南8海底管线海域水流和地质条件,采用1∶10比尺进行水流作用下水槽断面物理模型试验,开展了滩海区域仿生草的缓流效果和仿生草周边泥沙冲淤变化研究。试验结果表明,水流作用下,海底仿生草草内流速减小,草外流速增大;铺设仿生草对减小作用于铺设段海床的水流动力有较好效果,水位较高时,仿生草有较好的缓流促淤效果,但在水位较低、流速较大时,仿生草因铺设密度较大而产生较大的局部冲刷。水深小于2 m的滩海区域要慎重选用。
The current situation of protection techniques of artificial grass is investigated. According to the water currents and geological conditions in the sea area of subsea pipelines of Hainan No. 8 of Liaohe Oilfield of CNPC, researches are conducted on the efficiency of artificial grass in reducing flow velocity in beach areas and the variation of sediment scour by means of the flume section physical model tests with a scale of 1 ： 10 under water currents. The test results show that under the water currents, the flow velocity within the artificial grass decreases, and that outside the artificial grass increases. The placement of artificial grass has satisfactory efficiency in reducing the hydrodynamic forces on the seabed. When the water level is high, the artificial grass has good effectiveness of reducing flow velocity and promoting deposition. However, when the water level is low and the flow velocity is large, severe local scour is aroused owing to large placement density of the artificial grass. Accordingly, the artificial grass should be carefully adopted in the beach areas with the water depth smaller than 2 m.
出处
《海洋工程》
CSCD
北大核心
2014年第2期104-109,132,共7页
The Ocean Engineering
关键词
滩海工程
仿生草
冲淤变化
防护
beach project
artificial grass
scour-deposition variation
protection
