• Rifqi Brilyant Arief Civil Engineering Program, Bandung Institute of Technology, Bandung, Indonesia https://orcid.org/0000-0003-1456-562X
  • Masyhur Irsyam Civil Engineering Program, Bandung Institute of Technology, Bandung, Indonesia
  • Idrus M Alatas Civil Engineering Department, National Institute of Science and Technology, Jakarta, Indonesia
  • Sugeng Krisnanto Civil Engineering Program, Bandung Institute of Technology, Bandung, Indonesia
  • Endra Susila Civil Engineering Program, Bandung Institute of Technology, Bandung, Indonesia
  • Hasbullah Nawir Civil Engineering Program, Bandung Institute of Technology, Bandung, Indonesia
  • Ramli Nazir School of Civil Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia




Clay shale, bored pile friction, shear strength degradation, weathering, direct shear


This research aims at investigating and modeling the axial bearing capacity degradation of a bored pile on clay shale due to the bored pile installation processes. Clay shale sample models were prepared to simulate the wetting and drying cycles through weathering process between 0 to 6 hours. All samples were tested in which every 1 hour of the weathering process representing 1 cycle of wetting and drying. The direct shear laboratory tests were performed to obtain the peak and residual shear strength parameters of the interface between the bored pile and clay shale. The peak and residual shear strength parameters were obtained after 6 hours of the weathering process. The residual shear strength parameters were measured by applying with and without stress release. This investigation showed that the shear strength degradation at peak, residual without stress release, and residual with stress release respectively reached 87-62%, 28-20%, and 25-14% after 1 to 6 hours of weathering process. This result is very useful for predicting the bored pile skin friction in clay shale soils.


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How to Cite

Brilyant Arief, R., Irsyam, M., M Alatas, I. ., Krisnanto, S. ., Susila, E. ., Nawir, H. ., & Nazir, R. . (2022). EFFECT OF CLAY SHALE SHEAR STRENGTH DEGRADATION ON BORED PILE FRICTION IN CLAY SHALE. Jurnal Teknologi, 84(5). https://doi.org/10.11113/jurnalteknologi.v84.18220



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