QS-M Grout

Quality assurance and structural health monitoring of grouted joints on underwater load-bearing structures of offshore wind turbines


01.11.2014 – 30.04.2017


The overall aim of QS-M Grout is to develop methods and technologies for the efficient monitoring of grouted joints.

For this purpose, methods and measurement options are to be developed and tested for

    a) the quality assurance of a grouted joint directly after creation in the form of a baseline measurement and its assessment in relation to a standardized model; QS-Grout
    b) ongoing monitoring of grouted joints over the life of 20 to 25 years in the form of a self-learning autonomous SHM system with automatic alarm function; SHM Grout/SHM Grout global and SHM; Grout local
    c) the specific checking of grouted joints for prescribed regular inspections or after the continuous monitoring system mentioned under b) sounded an alarm; Grout check
    d) the monitoring of grouted joints at the level of an offshore wind farm; Farm Monitoring.Grout

In the project, two large-scale tests and measurements are carried out on actual structures:

Monopile test: Measurement campaign in the IWES foundation test basin on a scale of 1:10 at a monopile with undamaged (condition 1) and damaged (condition 2) grouted joint for the development of the SHM.Grout system according to b)

Fresh grout test: Creation of a faulty grouted joint on a scale of 1:3 to 1:1 in the port basin with subsequent quality assurance using rod wave tomography; Measurement according to a) for QS-Grout

Measurements on actual offshore structures are performed in the wind farms Baltic II and Meerwind Süd Ost.


Project leader

  • Wölfel Engineering GmbH + Co. KG

Funded partners

  • BALTIC Taucherei- und Bergungsbetrieb Rostock GmbH
  • Fraunhofer-Institut für Keramische Technologien und Systeme – Materialdiagnostik, IKTS-MD
  • Fraunhofer-Institut für Windenergie und Energiesystemtechnik, IWES
  • WindMW GmbH
  • Wölfel Engineering GmbH + Co. KG

Associated partners

  • DNV GL
  • RWE Innogy

Project leader

  • Wölfel Engineering GmbH + Co. KG

Funding details

Project management agency

  • Projektträger Jülich / Forschungszentrum Jülich GmbH