ABSTRACT
The risk assessment relating to geological and geotechnical conditions depends on the uncertainty in key parameters. However, understanding and communicating the spatial distribution of the uncertainty and corresponding risk is often a challenge. This paper presents a case study where three-dimensional risk maps were generated using site investigation data and spatial interpolation tools for the interpretation and communication of cutter tool wear risk. In addition, the maps are used to forecast the number of cutter tools requiring replacement during construction, which can serve as a decision aid for intervention planning. Construction data and observation logs are used to validate these maps and demonstrate how they can provide a more comprehensive assessment of tunneling risks.
