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When infrastructural routes pass through sites with a long-term natural balance, landslide processes may be instigated. The reason is the human intervention. The scale of this intervention is usually sufficient to break the balance border between the admissible human intervention and nature. Crossing this frontier is followed by increased expenditures and termination of construction activities. The subject of this paper covers not only the measures for the ecological balance to be efficiently restored. Attention i...

The mineral springs are deep but they cause spills near to the ground surface. In ancient times, buildings have been erected at the level of the spills, and water has been used for heating. Nowadays, the ground surface is some 12 m over the mineral water spills. The structures of the new metropolitan railway are 15-20 m under the ground surface which means that they have to pass through Pliocene clays soften by the mineral water. These specific geological conditions require a specific approach of underground const...