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Improving the lateral capacity of monopiles in submarine clay

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Haiderali, A 

Abstract

jats:p The European offshore wind sector has been undergoing tremendous growth, resulting in offshore wind farms having larger wind turbines that are located further away from the shore in harsh environmental conditions. To cater for the resulting higher loads, the current trend has been to continually increase the size of the monopile, which is the most popular foundation type. However, this is not viable in the long term given the current installation technology. This paper presents the results of three-dimensional finite-element analyses investigating the improvement in the lateral capacity of a large-diameter monopile in clay when used in combination with hybrid features and rock armour. Non-skirted reinforced concrete and steel footings, a skirted steel footing and steel fins were assessed under a combination of vertical, lateral and moment loads expected at an offshore wind farm location with a water depth of 30 m. The findings, based on shear and bending moment developed in the monopile and mobilised soil resistance, indicate the skirted steel footing and fins to be the most effective in enhancing monopile lateral capacity at serviceability. </jats:p>

Description

Keywords

4005 Civil Engineering, 4015 Maritime Engineering, 40 Engineering, 7 Affordable and Clean Energy

Journal Title

Proceedings of the Institution of Civil Engineers: Ground Improvement

Conference Name

Journal ISSN

1755-0750
1755-0769

Volume Title

169

Publisher

Thomas Telford Ltd.
Sponsorship
Engineering and Physical Sciences Research Council (EP/H013857/1)