Numerical Analysis of Floatation Response of Buried Pipeline in Liquefied Soil

Abstract:

In this paper, the formulae are deduced for the floatation response of pipeline buried in liquefied soil. The beam model based on the theory of beam on elastic foundation is used for the pipeline buried in non-liquefied and liquefied soil. The soil property is nonlinear, the floating force induced by the soil liquefaction is related to the position of pipeline, is nonlinear also. For the convenience and simplification of analysis, the nonlinear increment element method was used and lots of numerical analysis was conducted, including: the floatation response of pipeline buried in homogeneous soil, the floatation response of pipeline buried in non-homogeneous soil, and the floatation response of pipeline buried in discontinuous liquefied area. The influential factors on the floatation response of buried pipeline buried in liquefied soil including spring stiff of liquefied soil, the initial deformation, the length of liquefied area, the axial force acting on the pipeline, the material of pipeline, and the diameter of pipeline. The calculation results of discontinuous liquefied area draw a significant conclusion that for a long liquefied area, to make the soil non-liquefied in the middle of liquefied area may decrease the length of liquefied area and reduce the flotation displacement of pipeline greatly.

• Periodical: Applied Mechanics and Materials (Volumes 580-583)
• Pages: 791-796
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.580-583.791
• Online since: July 2014
• Authors: Su Nan Deng, Wen Tao Peng, Jun Qi Lin
• Keywords: Buried Pipeline, Floatation Response, Soil Liquefaction

References

[1] Lin Junqi, Xiong Jianguo, Analysis of Floating Response of Buried Pipeline in Liquefied Soil, Earthquake Engineering and Engineering Vibration, Vol. 20 No. 2 2000 (in Chinese).

[2] Gan Wenshui, Hou Zhongliang, Floatation Response of Buried Pipeline in Liquefied Soil, Special Structures, Vol. 6 No. 3 1989 (in Chinese).

[3] Xiong Jianguo et al, Study on Seismic Problems of Oil Supply Pipeline in Liquefied Soil, Technical Report of Seismological Institute of Laoning Earthquake Adiministration, 1993 (in Chinese).

[4] K. Shimamura et al，Experimental and Analytical Study of the floatation of Buried Gas Steel Pipe Due to Liquefaction, 12WCEE, 2000, Paper No. 1385.

[5] Zou Degao et al, Experimental Study on the Floatation Behavior of Pipeline in Saturated Sand Foundation and Earthquake Resistant Measures during an Earthquake, Chinese Journal of Geotechnical Engineering, Vol. 24 No. 3 2002 (in Chinese).

[6] Hou Zhongliang et al，Anti-seismic of Buried Pipeline, Academic Books and Periodicals Press, 1990 (in Chinese).

[7] Hu Yunxian, Earthquake Engineering, Seismological Press, 1990 (in Chinese).

[8] Lin Junqi, Li Zuohua, Hu Mingyi, Study on Floatation Response of Buried Pipeline Induced by Soil Liquefaction, Earthquake Engineering and Engineering Vibration, Vol. 24 No. 3 2004(in Chinese).

[9] Lin Junqi, Li Zuohua, Hu Mingyi, Study on Floatation Response of Buried Pipeline due to Non-homogenous Soil Liquefaction, Earthquake Engineering and Engineering Vibration, Vol. 24 No. 4 2004(in Chinese).