CUED Publications database

Improving the lateral capacity of monopiles in submarine clay

Haiderali, A and Madabhushi, G (2016) Improving the lateral capacity of monopiles in submarine clay. Proceedings of the Institution of Civil Engineers: Ground Improvement, 169. pp. 239-252. ISSN 1755-0750

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© ICE Publishing. All rights reserved. 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.

Item Type: Article
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:39
Last Modified: 09 Sep 2021 00:39
DOI: 10.1680/jgrim.14.00039