ABSTRACT
In a context of global risk analysis for tunnel projects, the prediction of settlements due to shallow tunneling is a huge challenge for design firms. The finite element simulations, in two or in three dimensions, tend to provide poor predictions of the settlements induced at the surface. This is why the empirical method, based on Peck’s works, is often privileged. This paper illustrates on an example the use of a new method to predict settlements due to urban tunneling. The method is grounded on finite element simulations based on a new constitutive model for soil. It discusses also the modeling and influence of pre-support structures. This example highlights the capacity of this new way of modeling to help the designer to choose the right construction process to manage the risk of settlement on surface structures.
