Author(s)

Chao Liang ^1,2

Affiliation(s)

¹ State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin, China
² State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, China

Corresponding Author

Chao Liang

ABSTRACT

The well composite pile, used as a wellhead structure to support offshore oil platform, can effectively reduce the construction cost of the platform. The riser composite pile, with its variable cross-section foundation, has different lateral characteristics compared to ordinary pile foundations. In this paper, numerical analysis methods are used to analyze the lateral bearing capacity and the distribution of bending moments along the composite pile under lateral load. The results indicate that the upper part of the composite pile bears most of the load, with the bending moment concentrated towards the upper section. For the same pile top displacement, as the penetration depth of the riser decreases, its lateral bearing capacity weakens, and the lateral load is gradually borne by the surface casing, causing the location of the inflection point of the composite pile to be closer to the mudline.

KEYWORDS

Well composite pile, lateral bearing capacity, offshore platform

CITE THIS PAPER

Chao Liang, Study on the lateral bearing characteristics of well composite pile. Journal of Civil Engineering and Urban Planning (2024) Vol. 6: 38-42. DOI: http://dx.doi.org/10.23977/jceup.2024.060305.

REFERENCES

[1] Liang, C., Liu, R., Wan, J., Guan P., & Li X Y. (2018, June). Study on vertical bearing capacity of the riser composite pile in clay. In International Conference on Offshore Mechanics and Arctic Engineering (Vol. 51302, p. V009T10A015). American Society of Mechanical Engineers.
[2] Liu, R., Liang, C. (2021). Study of the bearing capacity at the variable cross-section of a riser-surface casing composite pile. China Ocean Engineering, 35(2), 262-271.
[3] Liang, C., & Liu, R. (2021). Calculation method for the vertical bearing capacity of a riser-surface casing composite pile. Ships and Offshore Structures, 16(sup2), 66-76.
[4] Ismael, N. F. (2006). Analysis of lateral load tests on step tapered bored piles in calcareous sands. In GeoCongress 2006: geotechnical engineering in the information technology age (pp. 1-6).
[5] Shafaghat, A., Khabbaz, H., & Fatahi, B. (2021). Analytical and Numerical Approaches to Attain the Optimum Tapering Angle for Axially-Loaded Bored Piles in Sandy Soils. International Journal of Geomechanics, 21(7), 04021099.
[6] Xiong, L., & Chen, H. (2020). A numerical study and simulation of vertical bearing performance of step-tapered pile under vertical and horizontal loads. Indian Geotechnical Journal, 50, 383-409. 
[7] Nasrollahzadeh, E., & Hataf, N. (2022). Experimental and numerical study on the bearing capacity of single and groups of tapered and cylindrical piles in sand. International Journal of Geotechnical Engineering, 16(4), 426-437.

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