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Friction Characteristics Between Marine Clay and Construction Materials

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Abstract

Structure-soil interface friction characteristics is of importance to investigate the interaction between engineering structures and soils, especially for offshore structures. The interface friction behavior between marine clay and structural materials with different roughness was studied in this paper by using 3D optical scanning tests, a modified direct shear device and numerical simulation. Relationships between the surface roughness of structures, water content and interface friction angle were presented by model tests. The increase of water contents decreased the interface friction angles. For interfaces with different roughness, the interface friction angles will be smaller than that of the soil when the water content exceeds a certain value. The roughness of the interface and the water content of the soil are mutually coupled to influence the coefficient of friction (COF). This paper proposed a Finite Element Method (FEM) to simulate the interface direct shear tests of structures with different roughness. The surface models with different roughness are established based on the structure data obtained by 3D scanning. The Coupled Eulerian-Lagrangian (CEL) approach was employed to analyse soils sheared by irregular surfaces. The interface behavior for interfaces with different roughness under cyclic shear stresses was analyzed by FEM.

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Abbreviations

R a :

Average roughness

w :

Water content

ρ bulk :

Density

L L :

Liquid limit

P L :

Plastic limit

L I :

Liquidity index

G s :

Specific gravity

COF :

Coefficient of friction

σ n :

Normal stress

τ :

Shear stress

N :

Number of shear cycles

D :

Diameter of pipe pile

L :

Length of pipe pile

t :

Width of shear zone

d :

Plastic zone height

φ′:

Internal friction angle

c′:

Internal cohesion

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Acknowledgements

We would like to acknowledge gratefully that the work presented in this paper is supported by a grant from the National Natural Science Foundations of China (No. 5217 1282). This research is also supported by Taishan Scholars Program of Shandong Province, China (No. tsqn2023 06098), and the Shandong Provincial Key Research and Development Plan, China (No. 2021ZLGX04).

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Correspondence to Hailei Kou.

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Kou, H., Huang, J. & Cheng, Y. Friction Characteristics Between Marine Clay and Construction Materials. J. Ocean Univ. China 23, 427–437 (2024). https://doi.org/10.1007/s11802-024-5474-7

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  • DOI: https://doi.org/10.1007/s11802-024-5474-7

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