Crowded Underground – soil and in-fill material requirements
The use of underground space
We must also add higher requirements for seepage drainage of rainwater, while streetside trees and other vegetation also demand space underground for healthy root and plant growth.
Every utilisation requires corresponding ambient conditions. This is true both of the civil-engineering and horticultural properties of the soils and in-fill materials used, and of the natural functions of the soil. In practice, this can result in overtaxing of the underground, with significant conflicts and development bottlenecks as the consequence. Appropriate solutions are needed both in planning and in civil engineering. Important lines of argumentation and developments for the German-speaking regions are examined below.