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Webinar Geotechnical and Geophysical Assessment HKN WFZ

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    13-06-2019 10:00:00 13-06-2019 12:15:00 Europe/Amsterdam Webinar Geotechnical and Geophysical Assessment HKN WFZ Introduction: Martijn Klein (Fugro) will guide you through the soil conditions and the geological context at the Hollandse Kust (noord) Wind Farm Zone  (HKN WFZ) based on geophysical and geotechnical data. The geophysical site survey at the Hollandse Kust (noord) Wind Farm Zone (HKNWFZ) was designed to improve the bathymetrical, morphological and geological understanding of the area. The geotechnical campaign aimed to validate the geological model resulting from the geophysical... noreply DD-MM-YYYY
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By WOZ_RVO.nl 34 days ago
13-06-2019 10:00
13-06-2019 12:15

Introduction: Martijn Klein (Fugro) will guide you through the soil conditions and the geological context at the Hollandse Kust (noord) Wind Farm Zone  (HKN WFZ) based on geophysical and geotechnical data. The geophysical site survey at the Hollandse Kust (noord) Wind Farm Zone (HKNWFZ) was designed to improve the bathymetrical, morphological and geological understanding of the area.
The geotechnical campaign aimed to validate the geological model resulting from the geophysical investigation and to confirm the soil engineering properties at HKNWFZ. Those properties are required by developers to progress with their geotechnical foundation designs and other general design and installation requirements for the wind farm, as well as those relating to cable installation.

A panel of the following experts: Sven Plasman, Erik Schoute (Fugro), Hauke Zachert, Hans-Martin Raeker (Arcadis), Amandine Longuet (Cathie Associates) and Frank van Erp (Netherlands Enterprise Agency) will be present to answer any questions on the geotechnical and geophysical assessment.


Supplier:
Fugro

Results of this assessment: Four main soil units were defined within the HKN WFZ. The top two soil units (A and B) were deposited in shallow marine to coastal plain environments during the Holocene. The soil units below (C and D) were deposited during a number of glacial and interglacial stages of the Pleistocene. During the interglacial stages fluvial to fluvio-deltaic sediments were deposited, whereas during glacial stages fluvio-glacial sedimentation prevailed, interrupted by episodes of subaerial exposure and extensive erosion.
Two main palaeochannel systems/levels were identified across the HKN WFZ. The upper system at the base of soil unit B is related to meltwater channels incised at the end of the last glaciation and filled with clay-rich, early Holocene deposits. The lower palaeochannel system, at the base of soil unit C, is of post-Saalian glaciation and exhibits high variability in terms of shape, depth and infill (predominantly sand). Further, internal channelling features were observed occasionally within the Pleistocene units (especially in soil unit D) which are typically related to fluvial and fluvio-deltaic settings and therefore can be expected within these units.

Soil conditions across the HKN WFZ are predominantly characterised by sand deposits, with minor clays and intermediate soils. There is a limited lateral correlation of geotechnical soil properties across the site, as expected for a complex continental shelf setting. Spatial soil variability particularly applies to units that were influenced by fluvial processes


Time Schedule:
The webinar will consist of two parts;

Part I: 10.30-11.15 hr. CEST

Part II: 11.30-12.15 hr. CEST

The deliverables of this assessment: The results of the geophysical study are available at; https://offshorewind.rvo.nl/soilnh The results of the geotechnical study will be published in April 2019.

Preparations webinar: Please register at least one day in advance at woz@rvo.nl. You will receive a link to the webinar. 

Please take notice of the geotechnical and geophysical deliveries prior to the webinar, in order to be prepared to ask questions. The webinar will be held on an anonymous internet platform, so your questions will not be traceable to you or your company.