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Distributed Fiber Optic Sensorsfor Dams and Levee Deformation Monitoring
Daniele Inaudiinaudi@smartec.chSMARTEC SA, Manno, Switzerlandwww.smartec.chRoctest, St. Lambert, Canadawww.roctest.com
SMARTape: Strain sensing
SMARTProfile: Strain and Temperature sensing
Hydro & Geo: Strain and Temperature sensing
Distributed sensors, buried
Potential sliding area
puts in traction
in concerned areas
Potential settlement area
detected and localized
Sensing cable for monitoring the strain and temperature distribution dependent on the solar radiation, air/water temperature and water level.
Sensing cable in different layers for temperature monitoring during the concrete setting.
Sensing cable for monitoring the temperature gradient dependents on the solar radiation, air/water temperature and water level.
Monitoring Joints movements
Surface, gallery or borehole installation for old dams.
Embedded solution for dams under construction.
New Orleans Levee District,
Shannon and Wilson]
[SMARTEC, Geocomp, New Orleans Levee District, Shannon and Wilson]
[Source: Deltares, Tencate, Inventec]
Failure zone identified by high deformations at the edges.
A weak spot in the dike was discerned during the first excavation stage,42 hours before the dike really failed.
[Source: Deltares,Tencate, GeoPhyConsult]
A total of 4 km of SMARTGeoTex Rope – DiTeSt were installed on a wide old-mine area
Digging of the trench where the SMARTGeoTex Rope is deployed
[Source: Burns & McDonnell]
Some unique features of FOS, in particular distributed sensing, open new application possibilities
Distributed sensing offers an ideal solution for the detection and localization of new conditions such as leakages, settlements, cracks, abnormal joint movements and others
Many successful application examples worldwide demonstrate the maturity of FOS technologyConclusions