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    Item type:Article, Access status: Open Access ,
    Monitoring konstrukcji ziemnych przy zastosowaniu rozłożonych przestrzennie światłowodowych sensorów optycznych, zintegrowanych w geosyntetykach
    (Wydawnictwa AGH, 2011) Wosniok, Aleksander; Krywult, Łukasz; Liehr, Sasza; Krebber, Katerina; Wendt, Mario; Chrost, Andrzej
    In modern earthwork structures (roads and railway embankments, dikes and dams), it is common procedure to embed geosynthetics like non-woven and grid structures into their soil bodies. These geosynthetic materials act as filters, reinforcement and drainage elements. They are also integrated for strengthening of the earthwork structures and prevention from surface erosion. By incorporating sensors in the geotextiles, »smart« technical textiles can be realised. Such multifunctional technical textiles can interact with their environment and sense various measurement categories such as temperature, strain and chemical parameters which allow to detect and to locate the presence of any damages and destructions in real time. In comparison with traditional measuring systems (pressure cells, piezometers and inclinometers which produce only point measurements) fibre optic sensors are well suited for mentioned spatial distributed monitoring purposes. The very tiny optical fibres of a diameter of less then 1 mm can operate as sensors in strong electromagnetic fields, under »harsh« explosive and chemical environments and under ionizing radiation. The spatial distributed fibre optic sensors are based on Brillouin scattering in glass optical fibres and on optical time domain reflectometry (OTDR) in polymer optical fibres. The paper gives an overview of these innovative fibre optic sensors embedded in geosynthetics and presents field test results.