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Wind Turbines

Overview

Newly constructed wind turbines often require instrumentation to verify the design and long-term performance of their foundations. For piled foundations, sister barsstrain gauges and incremental extensometers are often used to measure load distribution along the pile, and in-place inclinometers (installation shown at left) are used to measure deflections during any pile testing programs undertaken to efficiently design the pile dimensions. The same sensors can be used to monitor loads in the piles, in near real-time, and load cells can be employed to monitor the effectiveness of any lock off bolts. For raft foundations, tiltmetersearth pressure cellsdeformation gaugesdifferential settlement systems and multiple position borehole extensometers can be installed to detect tilting and to monitor any separation or movement between the foundation and the underlying soil/rock material. Biaxial tiltmetersstrain gauges, and dynamic strain transducers are useful to measure any tilting and distortions of the tower. Dataloggers are used to gather and transmit information and data, via the internet, to provide near real-time data display and monitoring at any location using Vista Data Vision software.