The University Campus in Berlin-Adlershof is well known for the many research institutions present in its area. One of those is the HZB Helmholtz – Zentrum Berlin, where a prototype of a linear accelerator with energy recovery is placed. In this building, electrons are accelerated to almost the speed of light using a great deal of energy. After passing through a high-speed path, the electrons are to be recaptured in bERLinPro and their energy recovered. Therefore the hall is protected by a reinforced soil structure made with the wrap-around system. In the last times, some foxes started to dig and excavate tunnels inside the embankment, creating some instability problems.