It would seem that what is not visible is not important, it has no role and is not worth to be mentioned. But there are human activities, which clearly include construction works, for which the above statement is not valid at all and the opposite is true. Vertical pipelines, infiltration galleries, laying of horizontal sewerage networks, drainage, inspection manholes, treatment of entry, installation of optical fibre pipes and others are at random some of the essential parts of the construction process, without which a quality building groundings cannot be done without. All these activities take place below ground level (so called building zero) and after their completion, the next stage of construction will be implemented. The Areál ledových sportů grounding is really solid.
picture: one of the inspection manholes