24 September 1997 Fiber optic pore-water-pressure sensing system for structural monitoring of a large dam at L'Eau D'Heure in Belgium
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Abstract
A fiber optic pore water pressure sensing system for structural monitoring of a large dam at L'eau d'heure in Belgium by M.R.H. Voet, B. Verwilghen. The concept and performances of a fiber-optic pore water pressure sensor is discussed for a specific geotechnical application. Monitoring of experimental conditions in the underground inspection galleries and drainage holes underneath the dam is a first aspect and construction and operation of the artificial water dam is the second aspect of structural monitoring. The monitoring of engineering, geotechnical, and operational parameters (total pressure, pore water pressures, waterflow rates, etc.) are essential in these test and site survey programs. Comparison with parallel hydraulic and pneumatic measuring systems has been conducted. Performance of a distributed fiber optic network survey system, including eight sensors interconnected in a ring structure up to 64 sensors, is discussed. The fiber optic interrogating method (time domain multiplexing/frequency domain multiplexing) is described and typical results are presented.
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Marc R. H. Voet, B. Verwilghen, "Fiber optic pore-water-pressure sensing system for structural monitoring of a large dam at L'Eau D'Heure in Belgium", Proc. SPIE 3099, Micro-optical Technologies for Measurement, Sensors, and Microsystems II and Optical Fiber Sensor Technologies and Applications, (24 September 1997); doi: 10.1117/12.281244; https://doi.org/10.1117/12.281244
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