Monitoring of soil nailed slope stabilizations using distributed fiber optic sensing

Christoph Monsberger; Werner Lienhart; Sebastian Hirschmüller; Roman Marte

doi:10.1117/12.2296674

27 March 2018 Monitoring of soil nailed slope stabilizations using distributed fiber optic sensing

Christoph Monsberger, Werner Lienhart, Sebastian Hirschmüller, Roman Marte

Proceedings Volume 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018; 1059835 (2018) https://doi.org/10.1117/12.2296674
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States

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.

Conference Presentation

Citation Download Citation

Christoph Monsberger, Werner Lienhart, Sebastian Hirschmüller, and Roman Marte "Monitoring of soil nailed slope stabilizations using distributed fiber optic sensing", Proc. SPIE 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018, 1059835 (27 March 2018); https://doi.org/10.1117/12.2296674

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