Concrete diaphragm wall deformation monitoring Client Soldata Challenge Development of an OFS inclinometer to overcome the restrictions of conventional inclinometer chains (low multiplexing capability leading to expensive, impractical sensor chains and large boreholes). Testing of the developed OFS inclinometer in concrete diaphragm walls. Resolution SmartRods were attached to the dwall rebar frames and lowered into the excavation. Once the frames had been stabilized the excavation was ?lled with concrete whilst the ?bre optic cables to the SmartRods were contained within protective tubes.Conventional inclinometer chains were installed alongside the SmartRods so as to provide comparative measurements. Data from the rods was periodically logged using a W4 interrogator during stages of

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