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Sensors 2016, 16(2), 174;

Load Measurement on Foundations of Rockfall Protection Systems

WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstr. 111, 8903 Birmensdorf, Switzerland
Geobrugg AG, Aachstr. 11, 8590 Romanshorn, Switzerland
Institute of Forensic Medicine, Bühlstrasse 20, 3012 Bern, Switzerland
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Ha Duong Ngo
Received: 29 October 2015 / Revised: 15 January 2016 / Accepted: 25 January 2016 / Published: 29 January 2016
(This article belongs to the Special Issue Sensors for Harsh Environments)
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Rockfall protection barriers are connected to the ground using steel cables fixed with anchors and foundations for the steel posts. It is common practice to measure the forces in the cables, while to date measurements of forces in the foundations have been inadequately resolved. An overview is presented of existing methods to measure the loads on the post foundations of rockfall protection barriers. Addressing some of the inadequacies of existing approaches, a novel sensor unit is presented that is able to capture the forces acting on post foundations in all six degrees of freedom. The sensor unit consists of four triaxial force sensors placed between two steel plates. To correctly convert the measurements into the directional forces acting on the foundation a special in-situ calibration procedure is proposed that delivers a corresponding conversion matrix. View Full-Text
Keywords: rockfall; protection systems; net barrier; testing; post; foundation rockfall; protection systems; net barrier; testing; post; foundation

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Volkwein, A.; Kummer, P.; Bitnel, H.; Campana, L. Load Measurement on Foundations of Rockfall Protection Systems. Sensors 2016, 16, 174.

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