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DFOS applications at the Semmering Base Tunnel, Austria (Graz University of Technology)
Topic: FOSA Case Studies
Owner: FOSA Staff
Date: 2020-12-14

Distributed fiber-optic sensing applications at the Semmering Base Tunnel, Austria
Proceedings of the Institution of Civil Engineers Research Article Paper 2000006 Accepted 08/07/2020
The Semmering Base Tunnel in Austria is currently one of the largest tunnel construction sites in Central Europe…. Each access point poses specific challenges, and structural monitoring is a crucial element to ensure both economic and safe construction….At the Semmering Base Tunnel, fiber-optic sensing is used at every construction location to monitor tunnel linings, shafts, reinforced earth structures and pipelines. The authors also discuss the challenges posed by the installations and the results of long-term monitoring programs. The installed monitoring systems will, furthermore, be used throughout the expected 150-year operational lifetime of the tunnel. Unlike conventional sensors, fiber-optic sensors do not comprise electric or moveable components at the measurement location. A longer lifetime can, therefore, be expected for fiber-optic sensors, which makes them promising candidates for condition-based maintenance of civil infrastructure.
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