Extension of the metro in Sofia, third metro line; subproject: MS-9

Hidroinjekt Ltd. performs the strengthening of the metro station by building over 7000 m² of diaphragm walls under the protection of bentonite suspension with the following characteristics: thickness 0.80 m and maximum depth up to 27 m. The joints between the walls are made with waterproof tape to ensure more good watertightness of the walls themselves.