Jersey Water decided to fit out 3 old unused drainage holes with 6 sensors (2 sensors per borehole) able to measure the movements of the Val De La Mare Dam. The ASR (alkali-silica reaction) phenomenon, reservoir level variations, temperature’s influence, and uplift can be some forces and causes of the movements. Fiber optic technology has been considered the best technical solution for this kind of application.
Aim of monitoring:
Measuring vertical and oblique movements of the body of the Val De La Mare Dam in three different sections and blocks using fiber optic deformation sensors from Smartec, called SOFO.
The installation is too recent to have a meaningful understanding of the data at present. Both old and new monitoring systems will be used side-by-side for one year until sufficient data has been accumulated from the Smartec system to allow the client to conclude the dam’s performance from the new data.
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