Effectiveness of Foam Injection during Mechanized Excavation of Tunnels with TBM-EPB Technology
In the mechanized excavation of tunnels with Tunnel Boring Machines, an ever more frequently used technique worldwide is the Earth Pressure Balance (EPB) technology; during the excavation phases this technology requires continuous injection of chemicals under the form of foam to be mixed with the excavated soil.
Since the features of the foam influence significantly the excavation performances and the propagation of induced effects such as settlements in the environment, the studies of the parameters affecting the quality of the foam have great importance for practical purposes.