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Monitoring of soil nailed slope stabilizations using distributed fiber optic sensing
Author(s): Christoph Monsberger; Werner Lienhart; Sebastian Hirschmüller; Roman Marte
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Paper Abstract

Soil nailing systems are a common way to stabilize slopes and construction pits. Their design is usually based on the mechanical equilibrium of a rigid body motion and therefore, only tensile stresses are considered and accompanying forces like bending (shear stresses) in the soil nails are neglected. Continuous strain measurements along nails could verify this assumption, but may not be performed using conventional sensing technologies. This paper reports about monitoring of a soil nailed slope stabilization using distributed fiber optic sensing. Soil nails in different anchoring horizons were instrumented and autonomously monitored over several weeks, in which the construction pit was excavated continuously. After the excavation, the final load bearing capacity of one selected nail was determined within a classical geotechnical load test. In addition to the field measurements, the bending behavior of the instrumented nail system was analyzed under laboratory conditions. The presented studies demonstrate the high potential of distributed fiber optic sensing systems and their capability to extend traditional measurement methods in foundation engineering applications.

Paper Details

Date Published: 27 March 2018
PDF: 12 pages
Proc. SPIE 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018, 1059835 (27 March 2018); doi: 10.1117/12.2296674
Show Author Affiliations
Christoph Monsberger, Technische Univ. Graz (Austria)
Werner Lienhart, Technische Univ. Graz (Austria)
Sebastian Hirschmüller, Univ. of Applied Sciences Rosenheim (Germany)
Roman Marte, Technische Univ. Graz (Austria)

Published in SPIE Proceedings Vol. 10598:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018
Hoon Sohn, Editor(s)

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