CLG Karangahape presentation 23 February 2021

Karangahape Station CLG Presentation 23 February 2021

Beresford Square

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CLG Agenda 5:00 – Networking – coffees to order and light snacks 5:30 – Brief welcome – Simon Mitchell, Community Manager 5:35 – The Social Impact and Business Disruption report – Craig Mathieson, Planner • A summary of matters raised by the community, and how these have been responded to 5:45 – Project presentation – Dan Trotman Construction Manager Karangahape Station • Questions 6:00 – Public Realm presentation – Alan Whiteley, Interface Design Manager • Questions 6:30 – End Subject matter experts will be available to answer any questions Station updates - where we are now and what will happen this year • Mercury Lane • Beresford Square • Tunnelling update Public Realm • Mercury Lane • Beresford Square Stage A consultation results and Stage B 3

In Beresford they range from 22 – 40 metres and 1200m3 of concrete will be poured in three stages.

Works update D-walls construction has been a major milestone from December to now.

D-walls are the actual station walls.

We have completed all 26 Dwall panels in Mercury Lane and just wrapped up the 30 D-wall panels in Beresford Square this month.

The D-wall panels at Mercury Lane range in depth from 15 -31 metres and in total 2700m3 of concrete was used to create the station box, with an average of 104m3 per panel.

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Mercury Lane Progress January – March 2021 The work now is focused on pouring 1,300m3 of concrete for the L0 slab which is the roof of the underground station.

The concrete is poured in four stages. This is the first step of the ‘top down’ construction.

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Mercury Lane site concrete pour and steel fixing

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Mercury Lane January – March 2021 The next levels (B1 and B2) are constructed in this method.

We then excavate all the way down to B7, before building the remainder of the levels on the way back up, using what’s called ‘bottom up’ construction.

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Mercury Lane From the end of February to the end of March the excavation of the first level of the station is underway.

9000m3 of spoil will be removed which is the equivalent to 3.5 Olympic sized swimming pools filled to the brim.

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Tunnel Action in Mercury Lane Work on the mined tunnel beneath the noise enclosure is making excellent progress with the ‘Jean Batten’ road header currently making her way north under Mercury Lane.

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Mined Tunnels Two road header machines will excavate the stations 217-metre platforms and tunnels • TBM breakthrough (northbound): midJuly 2021

• TBM breakthrough (southbound): midJuly 2022

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Tunnel Action in Mercury Lane From January to June the first tunnel will reach Beresford Square and consist of 278 metres of excavation with 23,000m3 of spoil removed and 2.700m3 of shotcrete sprayed onto the walls of the tunnel.

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Beresford Square Progress

While all of this is happening in Mercury Lane, Beresford Square is also undergoing a massive transformation above and below ground.

Above ground the site is being prepared for excavation and the L0 slab concrete pour.

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Site offices

The site offices on the corner of Beresford Square and Hopetoun Street are now fully operational and host over 100 staff.

Currently we have 160 staff and will continue to grow until we reach our anticipated number of 400.

There is a similar site office in Mercury Lane.

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D-walls wrap up in February 9 February

12 February

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Th station floor is poured and massive steel cages arrive on site

13 February

18 February

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Bentonite plan is on the move The bentonite plant and its iconic big red silos will be removed in February, with this area becoming a one-way traffic system for equipment deliveries and trucks removing spoil.

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Next for Beresford - heading underground As the next stage of works begins - the construction of the station’s floors and excavation of the rock beneath.

This stage of works will take approximately a year and includes the pouring of the Station roof (ground floor slab), crane movements on slab and multiple truck movements to deliver concrete and remove soil.

Over 2000m3 of backfill will be excavated from February to April and 1200m3 of concrete poured. This is in preparation for the L0 Slab, the roof of the station.

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Questions?

Mercury Lane

Beresford Square

Thank you Next we will have an update on the public realm consultation progress

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