According to the circumstance of suspension of seabed pipeline appeared in ChengDao oil-field, the mechanism of suspension of seabed pipeline formed is analyzed, and the different measures to control the suspension are discussed comprehensively, the forming and practicing of underwater pipe pile method is mainly introduced.
根据目前埕岛油田海底管线出现悬空的实际情况,对海管悬空形成机理进行了分析,并对海管悬空治理的不同方案进行了综合评价,重点介绍了水下桩治理方案的制定和实施。
Scour - induced suspension.
埕岛海域地处1953年至1976年黄河在此入海形成的亚三角洲上,其特殊的地理位置和动力环境决定该海域有明显的冲刷现象,工程实测和物模试验结果均表明该区海底管道有冲刷悬空等许多隐患。
Maximum length of field pipeline span is related to the factors such as the strength of pipes and joint adapters,and the allowable pack angle,etc.
对机动管线两种连接接头、不同铺设形式时的挠度和管子折转角进行理论分析,得到它们之间的关系,并在此基础上,分别用两种连接器连接管线构成不同长度的悬空段进行实验。
Basing on the support for suspended parts of Rapid Prototyping(RP),five suspended features,comprising slope,arc roof,flat roof,free-end suspension beam and closed-end suspension beam,are concluded from all parts needing to be supported during RP process.
针对快速成形产品悬空部分的支撑问题,归纳出常见零件的5种悬空特征,分别为倾斜形、弧顶形、平顶形、开放式悬臂形、封闭式悬臂形。