Harbour Central project in Canary Wharf

Project typeGroundwork and RC Frames
Client: Modebest Builders Ltd
Value: £40.72M
Concrete value£6.0M
Duration: June 2016 – May 2018

The challenge:

Scope: to provide RC basement slab, RC waterproofed cores and lift pits, RC pile caps, RC waterproofed basement slab and liner walls, RC shared podium transfer slab over the entire basement area. 4 high rise RC tower cores and frames (41, 35, 27 and 24 storeys) using slip-form method of construction for the RC cores coupled with a static concrete pump and placing boom. 2m deep RC suspended second floor transfer slab, 2 low rise RC cores and frames, installing post tensioned concrete suspended slabs throughout.

The solution:

16,000 m3 of concrete together with 3000 tonnes of reinforcement installed in the basement RC work, RC cores and RC pile caps (excluding the podium transfer slab). Large concrete pours during the basement RC construction - 3396m3 poured in one day.

Innovative concrete design to controlled differential and peak temperatures. 2 m deep suspended RC transfer slab at the second floor. The specified concrete being C85 which required innovative mix design measures.

The 4 high rise RC tower cores were constructed utilising a slip-form concrete rising to heights of 24, 27, 35 and 41 storeys. Supplying up to two slipform rigs at one time we developed consistent slipform mix options to counter setting times and slip rate.

All suspended RC slabs, other than the podium and second floor transfer slabs, were constructed using a post tensioning system. The superstructure element of the reinforced concrete works required 36,000 m3.

The results

The total project required 52,000m3 of concrete solutions. Through planning, testing and collaboration the build was completed ahead of schedule.

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