How to Quantify the Reliability of a Geological and Geotechnical Reference Model in Underground Projects

摘要

Today the Geotechnical Baseline Report (GBR) and the Geotechnical Database Report, (GDR), are becoming standard contractual documents in any underground project to describe the expected geological and geotechnical conditions. The GBR contains a synthesis of all the acquired geotechnical data listed in the more comprehensive and purely factual GDR, and ultimately provides a geotechnical reference model for the project. Despite this, usually few or no information about the reliability of the model are provided. The article intends to present the R-lndex innovative methodology, a quantitative method to evaluate the reliability of the Geological Reference Model through a multiparametric approach and to improve the geological risk assessment. Applied examples from an alpine base tunnels (TELT) will be presented.