Surveying the underworld

Klaus Chmelina

Surveying technology in tunnel construction today, tomorrow (and beyond)

Since antiquity, the construction of underground structures (tunnels, shafts and caverns) has been an enormous engineering achievement and is a fascinating branch of surveying. How is it possible that two tunnels, cut through several kilometres from opposite sides can meet up with millimetre precision (which can even be forecast)? And how is it that surface subsidence resulting from tunnel building can be clearly observed from outer space? This, and indeed much more, is exactly what modern surveying technology and systems can deliver today. Surveying of the subterranean world is high-tech business in all its aspects. But how long can the profession of the surveying engineer continue to exist?

Lecture in German.

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