Liquefaction-induced settlement and lateral spreading effects on buried pipelines by using shaking table tests

Document Type : Research Article

Authors

1 Assistant Professor, Department of Civil Engineering, Faculty of Civil Engineering and Architecture, Malayer University, Malayer, Iran

2 Professor, School of Civil Engineering, University of Tehran, Tehran, Iran

Abstract

Due to the importance of buried pipelines, as one of the types of lifelines, it is necessary to consider all possible seismic hazards in their operation. Settlement and lateral spreading caused by liquefaction are among these risks. In this research, their effects have been investigated using two series of 1-g shaking table tests. Results show that the maximum displacement applied to the pipe occurs during the shake is greater than the residual displacement after the shake. Also, by investigating the shear stress-shear strain curves (hysteresis loop), the reduction of shear stiffness due to the shake was observed. After liquefaction occurs, the soil loses its shear strength and the slope starts to move downstream. It is observed that the contribution of cyclic strains due to ground vibration is far less than the contribution of strain due to monotonic displacement. According to the findings of this research, the deformation of the pipe is less than the settlement of the ground due to the liquefaction.

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American Lifeline Alliance (ALA) (2001). Guidelines for the design of Buried steel pipe. American Society of Civil Engineering (ASCE).
Castiglia, M., de Magistris, F. S., Onori, F., & Koseki, J. (2021). Response of buried pipelines to repeated shaking in liquefiable soils through model tests. Soil Dynamics and Earthquake Engineering, 143, 106629.
Ecemis, N., Valizadeh, H., & Karaman, M. (2021). Sand-granulated rubber mixture to prevent liquefaction-induced uplift of buried pipes: a shaking table study. Bulletin of Earthquake Engineering, 19, 2817-2838.
Hamada, M., Isoyama, R., & Wakamatsu, K. (1996). Liquefaction-induced ground displacement and its related damage to lifeline facilities. Soils and Foundations, 36(Special), 81–97.
Iai, S. (1989). Similitude for shaking table tests on soil-structure-fluid model in 1g gravitational field. Soils and Foundations, 29(1), 105-118.
Ko, Y. Y., Tsai, T. Y., & Jheng, K. Y. (2023). Full-scale shaking table tests on soil liquefaction-induced uplift of buried pipelines for buildings. Earthquake Engineering & Structural Dynamics, 52(5), 1486-1510
Lim, Y. M., Kim, M. K., Kim, T. W., & Jang, J. W. (2001). The behavior analysis of buried pipeline: Considering longitudinal permanent ground deformation. In Pipelines 2001: Advances in Pipelines Engineering and Construction (pp. 1-11).
Nourzadeh, D. D., Mortazavi, P., Ghalandarzadeh, A., Takada, S., & Ahmadi, M. (2019). Performance assessment of the Greater Tehran Area buried gas distribution pipeline network under liquefaction. Soil Dynamics and Earthquake Engineering, 124, 16-34.
O'Rourke, T. D., & Lane, P. A. (1989). Liquefaction hazards and their effects on buried pipelines.
Otsubo, M., Towhata, I., Hayashida, T., Shimura, M., Uchimura, T., Liu, B., ... & Rattez, H. (2016). Shaking table tests on mitigation of liquefaction vulnerability for existing embedded lifelines. Soils and Foundations, 56(3), 348-364.
Papadimitriou, A. G., Bouckovalas, G. D., Nyman, D. J., & Valsamis, A. I. (2019). Analysis of buried steel pipelines at watercourse crossings under liquefaction-induced lateral spreading. Soil Dynamics and Earthquake Engineering, 126, 105772.
Qiao, L., Yuan, C., Miyajima, M., & Zhai, E. (2008). Shake-table testing and FLAC modeling of liquefaction-induced slope failure and damage to buried pipelines. In Geotechnical Earthquake Engineering and Soil Dynamics IV (pp. 1-10).
Sun, H., Miyajima, M., & Qiao, L. (2009). Buried Pipeline Damage Caused by Soil Liquefaction under the Slope. 日本海域研究, 40, 59-64.