Stress analysis method for the large excavation of a river-crossing oil pipeline--A case study of Baiyang river oil pipeline

Xiaonan Wu, Hongfang Lu, Xiaomo Yu, Haowen Shu

Abstract


The primary cause of pipeline failure for the crossing oil pipeline is the accumulation of stress. However, there are very few research worked on the stress analysis of large excavation river-crossing oil pipelines. Nevertheless, in order to ensure that the pipeline is safe and sustainable, a stress analysis under operating conditions is necessary. In this study, we perform a numerical simulation of the Baiyang river oil pipeline with a large excavation using the finite element stress analysis software CAESAR II in which the pipeline’s stress distribution is analyzed. Through the engineering case study, we determined that under operating conditions the maximum stress is generated at the saddle weight, which indicates that this section of the river-crossing pipeline is the most dangerous. Through analysis and comparison of the Primary Stress, Secondary Stress and Equivalent Combined Stress, it was determined that the temperature difference is the primary factor for generating stress in an oil pipeline, whereas the internal pressure plays a lesser role in stress generation. After the factors affecting pipeline stress are analyzed, the results are translated into feasible solutions for engineering application, which will promote the sustainability and safety of oil transportation pipelines.

Keywords


stress analysis, oil pipeline, large excavation, river-crossing

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References


Metropolo, P. L., Brown, A. E. P., 2004. Natural gas pipeline accident consequence analysis. Process safety progress. 23(4), 307-310.

Zeng, J., Xu, J. C., Chen, G. H., Yuan, J. B., 2007. Applicability of risk assessment method for urban buried gas pipeline. Gas & Heat. 5, 55-61.

CNPC, 2007. GB 50253-2006 Code for design of oil transportation pipeline engineering. Press of China Planning, Beijing.

CNPC, 2008. GB 50423-2007 Code for design of oil and gas transportation pipeline crossing engineering, Press of China Planning, Beijing.

Wang, Z. Y., Yao, A. L., Tian, J., Jiang, H. Y., 2014. analysis on environmental risk for construction of gas and oil pipeline crossing rivers by large excavation. Environmental Science and Management. 39(4), 177-181.

Liu, Y. Z., 2006. Engineering instance of steel gas pipeline across river using trenchless technology. Gas & Heat. 26(8), 4-6.

Huang, K., Wu, S. J., Lu, H. F., Xian, Y., Su, Q. W., 2012. Stress analysis of the pipeline laid along the slope. Natural Gas and Oil. 30(4), 1-4.

Watkins, R. K., Anderson, L. R.,1999. Structural mechanics of buried pipes. CRC press.

Zhang, L. X., 1993. Structural matrix analysis of curved beams. Journal of the China Railway Society. 15(1), 80-86.

Peng, L. C., 1978. Stress analysis methods for underground pipelines. Pipe Line Industry. 47(5), 65-74.

Liu, Q. L., Yang M., 2008. 3-D theoretical analysis on the interaction between buried thin-wall pipe and soil. China Civil Engineering Journal. 41(4), 61-66.

Zhang, D. H., Lv, Y. M., 1999. Calculation of thermal stress intensity factor for semi-elliptical surface cracks of thin pipeline. Oil and Gas Storage and Transportation. 18(1), 13-17.

Wu, X. N., Lu, H. F., Huang, K., Tang, X. Y., Wu, S. J., Shen, G. Y., Fu, H. P., 2014. Stress analysis of gas pipelines at seismic belts based on the spectrum analysis. Natural Gas Industry. 34(5), 152-157.

Wu, X. N., Lu, H. F., Huang, K., Wu, S. J., Qiao, W. B., 2015a. Frequency spectrum method-based stress analysis for oil pipelines in earthquake disaster areas. PLoS ONE. 10(2), e0115299.

Lu, H. F., Huang, K., Wu, S. J., 2015a. Vibration and stress analyses of positive displacement pump pipeline system in oil transportation station. Journal of Pipeline Systems Engineering and Practice. 10.1061/(ASCE)PS.1949-1204.0000205. (Online)

Zhou, Z., Murray, D. W., 1995. Analysis of postbuckling behavior of line pipe subjected to combined loads. International journal of solids and structures. 32(20), 3015-3036.

Song, K. K., 2011. Industrial pipe stress analysis and engineering applications. Press of China Petrochemical, Beijing.

George, M. Pipe stress analysis theory guide. Beijing: COADE Inc China Technical Service and Traning Center; 1998.

Jiang, X., Wang, T. Y., Sun, L., Wu, X., 2013. Stress analysis of unburied gas pipelines laid in high slopes. Natural Gas and Oil. 31(6), 26-30.

Lu, H. F., Huang, K., Wu, S. J., Han, X. Y., Zhao, L. J., Gao, Z. X., 2015b. Stress and displacement analysis of aerial oil & gas pipelines: A case study of Lantsang tunnel crossing project. Journal of Engineering Research. 3(3), 141-156.

ASME, 2012. ASME B31.4-2012 Pipeline transportation systems for liquids and slurries. Press of American Society of Mechanical Engineers, New York.

Wu, X. N., Lu, H. F., Wu, S. J., 2015b. Stress analysis of parallel oil and gas steel pipelines in inclined tunnels. SpringerPlus. 4, 659.

Lan, H. T., Ma, B. S., Zhang, Y. W., Shu, B., 2015. Buried pipe affected by river erosion when crossing the Yangtze river. Journal of Pipeline Systems Engineering and Practice. 6(3), 10.1061/(ASCE)PS.1949-1204.0000128


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