Providing Specialized Services in Geomechanics 613.507.7575

Jeffrey Oke, Ph.D., EIT

contact: jeff.oke@mdeng.ca
jeffrey-oke-picDr. J.D. Oke offers expertise in underground support design. He has experience with 3D numerical modelling, and particular skills pertaining to developing calibrated models capable of reproducing support – rockmass interactions and overall ground response. Additionally, Dr. Oke has a thorough comprehension of structural analysis, geomatics, and rock and soil mechanics. He completed his Ph.D studies in 2016 on the numerical, empirical, and analytical analysis of umbrella arch support systems in underground excavations at Queen’s University.

Areas of Expertise:

  • Numerical modeling
    • Significant experience capturing accurate response of complete support systems in underground excavations.
    • 3D and 2D modelling
    • Itasca and RocScience software suites
  • Design and stability assessment of underground excavations and pit slopes
  • Engineered and natural slope stability assessment and mitigation design
  • Ground support design, assessment and review
  • Geomechanical site characterization

Publications:

Refereed Journal Articles (Published)

Oke, J., Vlachopoulos, N. and Diederichs, M.S (2016) Semi-Analytical Model for Umbrella Arch Systems in Squeezing Conditions. Tunnelling and Underground Space Technology. 56: 136–156. (DOI 10.1016/j.tust.2016.03.006).

Oke, J., Vlachopoulos, N. and Diederichs, M.S (2014). Numerical Analyses in the Design of Umbrella Arch Systems. Journal of Rock Mechanics and Geotechnical Engineering. (DOI 10.1016/j.jrmge.2014.09.005)

Oke, J., Vlachopoulos, N. and Marinos, V.P. (2014). Umbrella Arch Nomenclature and Selection Methodology for Temporary Support Systems for the Design and Construction of Tunnels. Geotechnical and Geological Engineering. (DOI 10.1007/s10706-013-9697-4)

Refereed Journal Articles (Under preparation)

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2015). Improvement to the convergence-confinement theory: Inclusion of support installation location and stiffness.

Refereed Conference Papers

Oke, J., Vlachopoulos, N. and Diederichs, M.S (2015). Recent advances in the design and understanding of umbrella arch systems, ISRM, Montreal Canada.

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2014). Semi-Analytical Model of an Umbrella Arch Employed in Hydrostatic Tunnelling Conditions. American Rock Mechanics Association, June 2014. Minnesota, USA.

Oke, J., Vlachopoulos, N. and Vazaios, I. (2014). The use of three dimensional numerical analysis procedures for the geotechnical analysis for design and construction of tunnel infrastructure. GeoRegina, Regina Canada

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2014). The Reduction of Surface Settlement by Employing Umbrella Arch Systems for Different Excavation Methods. EUROCK, International Symposium, May 2014, Vigo, Spain

Oke, J., and Vlachopoulos, N. (2014). Performance of Forepole Support Elements used in Tunnelling within Weak Rock Masses. International Association for Engineering Geology Congress, Torino, September 2014.

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2013). The Reduction of Surface Settlement Due to Underground Tunnel Construction by Employing Umbrella Arch Systems as Temporary Support Measures. GeoMontreal, Montreal Quebec, Canada.

Oke, J., Vlachopoulos, N. and Diederichs, M.S. 2013. Modification of the Supported Longitudinal Displacement Profile for Tunnel Face Convergence in Weak Rock. American Rock Mechanics Association, June 2013. San Francisco, USA.

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2013). Pre-Support Nomenclature and Support Selection Methodology for Temporary Support Systems within Weak Rock Masses.  World Tunnelling Congress, May-June 2013, Geneva, Switzerland.

Vlachopoulos N., Fortsakis, P. and Oke J. 2013. Investigation into the Influence of Parallel Excavation of Twin Bored Tunnels within Weak Rock Masses. GeoMontreal, Montreal Quebec, Canada.

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2012). Three-Dimensional Sensitivity Analysis of Forepole Support Elements for Underground Excavations in Weak Rock.  ARMA,  46th US Rock Mechanics / Geomechanics Symposium, June 2012, Chicago, USA

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2012). Determination of the Mechanistic Behaviour of a Forepole Support Element when Tunnelling within Weak Rock Masses. EUROCK, International Symposium, May 2012, Stockholm, Sweden

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2012). Improved Input Parameters and Numerical Analysis Techniques for Temporary Support of Underground Excavations in Weak rock. RockEng12, 21st Canadian Rock Mechanics Symposium, May 2012, Edmonton, Alberta, Canada

Paraskevopoulou, C.,  Oke, J. and N. Vlachopoulos, 2012. Practical modelling approaches to determine the long term behaviour of tunnel construction. Tunnelling and Underground Spaces: Sustainability and Innovations, October, Montreal, Quebec, Canada

Non-refereed Conference Presentations

Oke, J. (2013). Why Install Umbrella Arches in Tunneling Excavations? 4th Canadian Young Geotechnical Engineers and Geoscientist Conference, October, Mount Tremblant, Quebec, Canada

Oke, J., Vlachopoulos, N. and Diederichs, M.S. (2013). FLAC3D Numerical Modelling of Umbrella Arch Systems, RockEng13. Toronto, Ontario, Canada

Oke, J. (2012) Optimization of Modelling and Determination of Mechanistic Behaviour of Temporary Support Elements Associated with Tunnelling within Weak Rock Masses, ASERC Advances in earth sciences research conference, March , Kingston Ont.