This paper is concerned with the current tunnel practices in Ethiopia, the main challenges and risks which were associated with tunneling, risk assessment and controlling measures. In this paper the qualitative risk analysis is performed based on the surveyed data from the tunnel experts and other professionals participated on the tunneling work. The qualitative risk analysis has been conducted as an input for the risk matrix analysis method. The qualitative analysis incorporates risk identification, risk classification, risk ranking, risk responding and risk monitoring mechanism.?So, based on the qualitative analysis made and the result, those risks which occurred in the tunneling phase are ranked and controlling mechanism is developed. Accordingly, a guideline of risk management for tunneling work has been developed by referring different standards and based on the current tunnel practices in Ethiopia. The study helps to easily understand the most risks which are associated with tunneling and the risk controlling mechanism. This gives guidance to those who will be participated in the tunnel project for tunneling risk management throughout the entire project implementation.
References
[1]
Likhitruangsilp, V. and Ioannou, P.G. (2012) Analysis of Risk-Response Measures for Tunneling Projects. Construction Research Congress 2012, West Lafayette, 21- 23 May 2012, 258-266. https://doi.org/10.1061/9780784412329.027
[2]
Duddeck, H. (1987) Risk Assessment and Risk Sharing in Tunneling. Tunneling and Underground Space Technology, 2, 315-317.
https://doi.org/10.1016/0886-7798(87)90042-3
[3]
Ghosh, S. and Jintanapakanont, J. (2004) Identifying and Assessing the Critical Risk Factors in an Underground Rail Project in Thailand: A Factor Analysis Approach. International Journal of Project Management, 22, 633-643.
[4]
Choothom, S.A. (2006) Risk Allocation in Tunneling Contracts Using Tunnel Boring. Thesis, Chulalongkorn University, Bangkok.
https://ur.booksc.eu/book/21385859/b847f8
[5]
Baker, S.P. (1999) Risk Response Techniques Employed Currently for Major Projects. Construction Management and Economics, 17, 205-213.
https://ideas.repec.org/a/taf/conmgt/v17y1999i2p205-213.html
https://doi.org/10.1080/014461999371709
[6]
AKH (2016) Report on the Tunnel Construction of Awash-Kombolcha-Haragebeya Railway Project.
[7]
Antonio De Biase, R.G. (2007) Gibe II Tunnel Project—Special Designs and Measures Implemented to Face One of the Most Difficult Event in the History of Tunneling.
[8]
Cooke, J. (1975) Hazards in Tunneling and False Work. ICE Publishing, London.
[9]
Tayachew, M. (2015) Design and Construction of Tunnels in Ethiopia. Thesis, The School of Graduate Studies of Addis Ababa, Addis Ababa.
[10]
NSW (2006) Tunnel under Construction Code of Practice.
https://www.safework.nsw.gov.au
[11]
Spacková, I.O. (2012) Risk Management of Tunnel Construction Projects. Doctoral Thesis, Ing. Olga Spacková, Prague.
http://mech.fsv.cvut.cz/wiki/images/7/7a/PhD_dissertation_Spackova_2012.pdf
[12]
Li, L. (2018) A Study on Enterprise Risk Management and Business Performance. Journal of Financial Risk Management, 7, 123-138.
https://doi.org/10.4236/jfrm.2018.71008
[13]
Boom, R. (2019) Financial Risk Management in Dutch SMEs: An Empirical Analysis. Journal of Financial Risk Management, 8, 55-72.
https://doi.org/10.4236/jfrm.2019.82005
[14]
Sookye, L. and Mohamudally-Boolaky, A. (2019) Effectiveness of Financial Risk Management Framework: An Analysis of the Mauritian Banking Sector. Journal of Financial Risk Management, 8, 106-124. https://doi.org/10.4236/jfrm.2019.82008
[15]
Gafari, M.A. (2015) Identify and Analyze the Risks Involved in Tunnel Projects. Current World Environment, 10, 1102-1108.
https://doi.org/10.12944/CWE.10.Special-Issue1.129
[16]
Soren Degn Eskesen, P.T. (2002) Guidelines for Tunneling Risk Management.
[17]
ITIG (Insurance Members) (2006) A Code of Practice for Risk Management of Tunnel Works.
[18]
Couto, J.P., et al. (2018) Risk Evaluation in Tunneling Excavation Methods. REM— International Engineering Journal, 71, 361-369.