1. Department of Geological Engineering, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana
2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, China
3. Highway and Railway Research Institute, Hohai University, Nanjing, China
4. Department of Civil Engineering, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana