【摘要】 结合冀东南堡油田1号构造区海底管道裸露悬空段隐患治理工程,选择回填碎石防护、砂袋防护、仿生草防护、软体排防护以及后挖沟治理技术进行管道稳定性试验研究,根据本工程区域实际情况,建议在波高、流速较小的挖沙区域选择碎石和砂袋防护方案;在波高、流速中等的区域可采用仿生草防护方案,如果波高较大,可考虑采用砂袋充填;在水深较浅、波高、流速均较大的区域可选择软体排的防护方案,如果整段海底管道出现大范围、长距离的裸露或悬空,为保证整体管道的快速综合治理,可考虑后挖沟治理方法。结合经济性评价与比选,结果表明:对于裸露悬空管道的治理首选软体排防护,其次为仿生草防护,后挖沟治理只适用于非立管附近的直管段首次治理,砂袋防护和回填碎石防护只适用于抢险性的临时修复。更多还原

【Abstract】 Based on the practice in disposing hidden perils of the exposed and suspended submarine pipeline sections in No.1 block of Jidong Nanpu Oilfield,the stability tests were conducted regarding the different protective measures for the submarine pipelines. The protective measures corresponding to gravel backfilling,sandbag,artificial grass,soft mattress and post-trenching were considered to dispose the hidden perils,According to the practical situation of the project area,it was suggested to select gravel and sandbag as protection scheme in the sand-excavating area with low wave height and velocity,to choose artificial grass as protection scheme in the area with medium wave height and velocity,to adopt sand bag filling if the wave height is high,and to choose soft bag in the area with shallow water depth,high wave height and velocity. If the whole section of submarine pipeline is exposed or suspended in a large area and long distance,the method of post-trenching treatment can be considered to ensure the rapid comprehensive treatment of the whole pipeline.Considering economical evaluation analysis and comparison for those measures,the analysis results indicate that the protective measures of soft mattress and artificial grass are recommended to be applied in disposing the hidden perils, and post-trenching treatment is only applicable to the first treatment of straight pipe sections near the riser,whereas sandbag protection and gravel backfilling protection are only applicable in temporary repair.更多还原