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Brighton’s i360 tower takes shape

Mass concrete foundations for Brighton sea front’s new landmark are almost ready to be poured following excavation of the foundation pit.

Civils contractor Mackley has used Groundforce Mega Brace struts to provide support during the excavation for the 25m square by 7m deep foundation.

The excavation pit for the 162m-high tower is retained by a secant piled wall installed by Bachy Soletanche in March this year.

Mackley will place 1,900m3 of concrete and 190t steel rebar to form the foundation and will also cast a 5m diameter, 22t steel ring with 80 bolt fixings to which the tower structure will be secured.

Groundforce worked with Mackley to develop a support system that would allow the steel work to maximise the access for installation of the steelwork. The solution used a Mega Brace hydraulic frame as a waling beam around the top of the piled retaining wall with four hydraulic modular props – two 150t capacity MP150s and two 125t capacity MP125s – have been installed as knee-braces across each of the four corners.

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