Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more



Site investigation contractor Andrews Survey has carried out two investigations for wind farm sites off the east coast of England.

The first involved rapid acquisition of data to establish the seabed features of the turbine site and the route of the linking power cable.

Andrews carried out a sub-bottom profile and sidescan sonar survey, supplemented by a nearsurface geotechnical site investigation to the beach landfall.

The survey was then extended to the electricity substation using land techniques.

Andrews' development of lightweight CPTs for marine cable site investigations allowed work to be carried out from a small boat, allowing faster measurements and greater coverage in shallow water than conventional jack-up platforms.

Offshore, the company used its Mini-cone CPT with a 25kN/cm 2cone capable of 5m penetration.

The route of the cable from the beach landfall to the substation was surveyed using a 200kN land CPT truck.

The second site required deeper penetration for a meteorological mast foundation and a wider investigation across the entire turbine site using near-surface geophysics.

A heavy duty hydraulic vibrocorer on a 68m vessel was used to produce 6m cores into the weathered chalk, which were analysed at Andrews' Yarmouth soils laboratory.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.