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Influence of Matric Suction and Counterface Roughness on Shearing Behavior of Completely Decomposed Granitic Soil and Steel Interface

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Abstract

The interface can be defined as the zone in which the transfer of stresses occurs between soil and structure. The behavior interface is significantly influenced by stress state variables. In this paper, the influence of matric suction and counterface roughness on the interface shearing behavior was examined by conducting a series of suction controlled direct shear test on the interface formed between completely decomposed granite soil and steel specimens. Experimental tests were performed on two different types of soil–steel interfaces under different stress state variables. Test results show that matric suction has a significant influence on the interface shear behavior. The counterface roughness influences the dilative-contractive behavior of the interface. The critical interface shear strength at specific counterface roughness and net normal stress is controlled by the matric suction. The experimental results are compared with an analytical model that considers the influence of suction and dilation on apparent interface friction angle. The analytical model works reasonably well for predicting the unsaturated soil–steel interface shear strength under different stress state variables.

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Acknowledgments

The work in this paper is supported by a National State Key Project “973” Grant (Grant No/2014CB047000) (sub-Project No. 2014CB047001) from Ministry of Science and Technology of the People’s Republic of China, PolyU Shenzhen Research Institute, and The Hong Kong Polytechnic University, China.

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China

    L. Borana & J.-H. Yin

  2. PolyU Shenzhen Research Institute, Shenzhen, China

    J.-H. Yin

  3. Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India

    D. N. Singh

  4. Department of Civil Engineering, Edith Cowan University, Joondalup, Perth, Australia

    S. K. Shukla

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  1. L. Borana
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  2. J.-H. Yin
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  3. D. N. Singh
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  4. S. K. Shukla
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Correspondence to J.-H. Yin.

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Borana, L., Yin, JH., Singh, D.N. et al. Influence of Matric Suction and Counterface Roughness on Shearing Behavior of Completely Decomposed Granitic Soil and Steel Interface. Indian Geotech J 47, 150–160 (2017). https://doi.org/10.1007/s40098-016-0205-7

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  • DOI: https://doi.org/10.1007/s40098-016-0205-7

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