ABSTRACT
Mechanized tunnels are constantly used in urban spaces, and have become a viable option for projects with strict limits of disturbance, where underground solutions were deemed unsuitable in the past. However, several mechanisms of the excavation cycle are still not taken into account in tunnel design or in risk assessments, where an accurate prediction of the soil displacements is important. This paper presents how two models, for the grout flow and consolidation, can be associated with a finite element model to calculate the induced soil displacements during tail void grouting. These models were used to compute different examples of a tunnel excavated between two layers of sand, modelled as elastoplastic materials. The results reproduce the basic mechanisms of the process, identified in the field measurements.
