Open AccessOne method for defining an acceptable level of risks in tunneling
Author(s) -
Tamara Jovanovska,
Issa Togo,
Vasko Gacevski
Publication year - 2019
Publication title -
facta universitatis. series: architecture and civil engineering
Language(s) - English
Resource type - Journals
eISSN - 2406-0860
pISSN - 0354-4605
DOI - 10.2298/fuace190515018j
Subject(s) - quantum tunnelling , stability (learning theory) , reliability engineering , excavation , computer science , safety factor , fault (geology) , risk analysis (engineering) , engineering , geotechnical engineering , geology , business , materials science , optoelectronics , machine learning , seismology
This article presents one method for defining an acceptable level of risks in tunneling. The analyses are based on a simple analytical method for definition of tunnel stability using appropriate software in order to define the stability of excavations with and without protection. These analyses helped to find an approach on how to link the Acceptable Level of Risks with values of the Safety Factor (SF) and the Probability of Failure (PF). The explained methodology is related mainly to tunnels constructed in soft rocks or fault zones, but with some adaptations, it can be applied to other tunneling problems and other engineering structures. The case history used to test the methodology is a diversion tunnel at Hydro System "Sveta Petka" near Skopje. Based on these analyses, one proposal to define an acceptable (tolerable) level of risks using the criteria of the probability of failure and potential economic costs is presented.