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PDA on test piles for foundations of wind turbines

 

In October 2014 Allnamics performed PDA on test piles for the foundations of two wind turbines near Urk in The Netherlands.

 

The foundation for these wind turbines, which have a tower height of more than 100 meters (330 ft) and a capacity of 7 MW, each consist of 60 prefabricated square concrete piles (500 x 500 mm2, 20 x 20 in2) with a length between 19 and 23 meters (63 and 77 ft)

 

The PDA was performed with Allnamics’ wireless PDR, which allowed for registration and recording of all relevant hammer blow data, such as the transferred energy, the stresses in the pile and the dynamic pile resistance.

The end-of-drive data for each test pile were analyzed using Allnamics-DL signal matching software to determine the lower limit of the static pile resistance.

 

Shortly thereafter these piles were subjected to a Rapid Load Test using Allnamics’ StatRapid.

 

PDR and the combined sensors mounted on the pile

PDR and the combined sensors mounted on the pile

PDR aan Prefab Paal Urk Tijdens Hijsen

PDR on the pile during lifting of the pile. (No measuring cable)

PDR aan Prefab Paal Urk Tijdens Heien.

PDR on the prefab pile during driving and sending wireless the data.

 

 

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