DynData is a proposed Joint Industry Project in the process of being launched by Cathie Associates. The German authorities require dynamic pile load tests (DPLT) to demonstrate that axial pile resistance of piles is sufficient. These tests can only be executed during and/or after installation, ie. well after pile design and fabrication. Any potential lack of capacity measured then cannot be corrected. This puts pressure on projects to make the piles conservatively longer, larger, or use more piles, in order to avoid potential delays and costs if the DPLTs do not confirm design resistance. This in turn drives up the cost of fabrication and installation of the pile foundation, and ultimately increases cost of energy.
Methods for dimensioning a large-diameter driven pile are not well calibrated to DPLT results at the present time. This creates difficulty for designers and geotechnical consultants who must design piles that can be “proved” by DPLTs. Often, additional safety margins will need to be built in to avoid this situation with the inevitable cost impact. Alternatively, projects must accept the risk of delays and additional costs if the piles cannot be “proved” by the DPLTs. Therefore, the DynData Joint Industry Project is proposed to address these problems.
The purpose of the DynData JIP is:
- To benchmark and calibrate pile design methods so that the required pile length can be calculated more reliably;
- To facilitate the commercial exchange of pile load test data so that project teams can use the experience of measured DPLT data from earlier projects, to the benefit of their project.