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Determination of the Water Content within Tunnel Linings to Assess Fire Safety

  • Fires in tunnels are known to lead to explosive spalling of the tunnel linings, mainly due to rapid expansion of water as a result of vaporization in the concrete. In order to determine water content and assess fire safety within tunnel linings a novel measurement system has been developed. The development process includes the calibration of the sensor system via both direct and indirect approaches. This work compares both calibration methods and shows the differences that can occur due to measurement uncertainty. This work presents the measured water content within the Inntal tunnel, Austria as a representative tunnel from a total of four investigated tunnels. The obtained water content is compared to that found in the literature, and recommendations for practical work in terms of fire safety is given.

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Metadaten
Author:Sebastian Malz, Dirk Sindersberger, Gareth J. MonkmanORCiDGND, Oliver SteffensORCiDGND, Wolfgang KusterleORCiDGND
DOI:https://doi.org/10.2139/ssrn.4390700
Parent Title (English):SSRN Electronic Journal
Document Type:Preprint
Language:English
Year of first Publication:2023
Release Date:2023/07/13
Tag:Fire safety; concrete spalling; moisture measurement; moisture sensor; tunnel inner lining; water content
Pagenumber:22
Institutes:Fakultät Bauingenieurwesen
research focus:Gebäude und Infrastruktur
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG