Email Alerts
RSS
Simplified calculation of allowable free span length of submarine 'pipelines under action of solitary waves
-
摘要: 分析海底管道稳定性时，需要重点考虑管道发生悬空的情况。由于我国油田大多建设在近海地区，因此在考虑管道悬空问题时需考虑浅水区波浪的特点。基于孤立波理论，考虑浅水区波浪的特点，给出浅水区管道悬空段所受的动水作用力。针对常见的悬空形式，从管道最大静弯曲应力不超过材料许用应力的角度出发，推导出浅水区管道允许悬空长度的计算式。最后结合渤海湾某油田海底管道工程，计算出该海区管道的允许悬跨长度，认为该海区有部分管道已超过计算的允许悬跨长度，应进行加固处理。Abstract: It is important to consider the suspension of the submarine pipelines, analyzing the stability of the submarine pipelines. Because of the complex geological conditions of the seabed, the buried pipelines hung on the seabed are affected by waves. Once occurred the suspension of the pipelines, the suspended pipelines would be destroyed under the action of the external environment. The pipelines accidents lead to a great loss of property and bring the pollution of the marine environment. Because most of the oil fields are located in the offshore areas in our country, the characteristics of shallow water waves should be considered.Based on the solitary wave theory, and considering the non-linear effects of the shallow water waves, the hydrodynamic loads on the suspension of the pipelines was calculated in this study.For the common forms of hanging pipelines, considering that the max bending stresses are less than the material's allowable stress, the formula for the allowable free span length is derived. Finally, taking the submarine pipelines works in Bohai bay as a case history, the allowable free span length of the submarine pipelines was calculated.The calculation results show that a part of the pipelines' span lengths exceed the allowable span lengths, and they must be reinforced.
-
Key words:
- nonlinear wave theories /
- embedded submarine pipeline /
- wave force /
- suspended length
-
图 3 悬空管道受力分析示意
Figure 3. Diagram of analysis of forces of suspended submarine pipelines
管道形式 悬空段的位置/m 悬空长度/m 悬空高度/m 水深范围/m 混输管道 1 779~1 823 44 0.65 3.7~4.2 3 410~3 459 49 0.90 3.9~5.1 3 471~3 489 18 0.78 3.5 3 512~3 532 20 0.60 3.9~5.0 2 590~3 604 14 0.56 4.4 注水管道 1 632~1 689 57 0.24 3.4~3.7 2 600~2 616 16 0.30 2.2~2.9 2 807~2 813 6 0.35 4.2 2 894~2 899 5 0.23 2.7 
下载: 导出CSV
-
[1] 赫比希J B.海底管道设计原理[M].北京:石油工业出版社, 1988. HERBICH J B. Principle of submarine pipeline design[M]. Beijing: Petroleum Industry Press, 1988. (in Chinese) [2] 许文兵.平湖油气田海底输油管线临时修复方法[J].中国海洋平台, 2003, 18(2): 37-40. http://cpfd.cnki.com.cn/Article/CPFDTOTAL-SHSY200411001035.htm XU Wenbing. The temporary repairing method for sub-sea oil pipeline of Pinghu oil and gas field[J]. China Offshore Platform, 2003, 18(2): 37-40. (in Chinese) http://cpfd.cnki.com.cn/Article/CPFDTOTAL-SHSY200411001035.htm [3] 王维.确定海底埋设输油管线允限冲刷长度的一种实用方法[J].西南石油学院学报, 1996, 18(3): 94-97. http://www.cnki.com.cn/Article/CJFDTOTAL-XNSY603.013.htm WANG Wei. A practical method of obtaining allowable erosion length of sea-bottom imbeded oil pipeline[J]. Journal of Southwestern Petroleum Institute, 1996, 18(3): 94-97. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-XNSY603.013.htm [4] 马良.海底管道在水流作用时诱发的振动效应[J].中国海洋平台, 2000, 15(2): 30-35. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGHY200002012.htm MA Liang. The vibration effect of subsea pipelines under the effect of water[J]. China Offshore Platform, 2000, 15(2): 30-35. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-ZGHY200002012.htm [5] FURNES G K, BEOTSEN J. On the response of a free span pipeline subjected to ocean currents[J]. Ocean Engineering, 2003(30): 1553-1557. http://www.sciencedirect.com/science/article/pii/S0029801802001385 [6] DNV-OS-F101 Submarine pipeline systems[S]. [7] SUDHAN C M, SUNDAR V, RAO S N. Wave induced forces around buried pipeline[J]. Ocean Engineering, 2002, 29(5): 533-544. doi: 10.1016/S0029-8018(01)00012-9 [8] MÉHAUTÉB L. An introduction to hydrodynamics and water waves[M]. New York: Springer-Verlag, 1976. [9] 邱大洪.波浪渗流力学[M].北京:国防工业出版社, 2006. QIU Dahong. Wave percolation mechanics[M]. Beijing: National Defence Industry Press, 2006. (in Chinese) [10] 范运林.作用在海底管线上的波浪力[J].海洋科学, 1983(6): 1-7. http://www.cnki.com.cn/Article/CJFDTOTAL-HYKX198306000.htm FAN Yunlin. Wave forces on submerged pipelines near the sea-bottom[J]. Marine Science, 1983(6): 1-7. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-HYKX198306000.htm [11] 李春雨.南堡油田人工岛海底管线悬空分析及治理[J].内江科技, 2012(1): 113-119. http://www.cnki.com.cn/Article/CJFDTOTAL-KJNJ201201099.htm LI Chunyu. The analysis and control of submarine pipeline of artificial island of South Fort Oilfield[J]. Neijiang Science and Technology, 2012(1): 113-119. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-KJNJ201201099.htm [12] 河流海岸研究所. 冀东南堡油田1#构造水域波浪数模推算报告[R]. 南京: 南京水利科学研究院, 2014. Institute of River and Coastal Research. The calculation report of wave mathematical model for 1# waters in Nanpu Oilfield[R]. Nanjing: Nanjing Hydraulic Research Institute, 2014. (in Chinese) -
点击查看大图
图(5) / 表 (1)
计量
- 文章访问数: 796
- HTML全文浏览量: 7
- PDF下载量: 659
- 被引次数: 0
