Source: P Precinct
Source: P Precinct
Those special memories were shared yesterday as the contract was signed to restore the earthquake-damaged building over the next three years: designs sketched on a kitchen table, children graduating and people queuing to visit on opening day.
The Christchurch Town Hall will be restored and strengthened over the next three years at a cost of $127.5 million. The main auditorium has been partially stripped out in preparation for the revamp.
The contract was signed in the heritage building’s foyer with restoration and strengthening work costing $127.5 million, largely funded by $68.9 million in insurance money.
Christchurch mayor Lianne Dalziel remembered visiting the building on opening day in 1972.
“I remember thinking this [foyer space] was so big,” she said.
“The queue went for miles. We all came in and we marveled at this incredible building.
“This place has been where we come together as a city to celebrate. This adds up financially and emotionally for the benefit of the city as a whole. Roll on 2018 and the opening day.”
Original architect Sir Miles Warren remembered designing the building on his kitchen table in Church Bay over the Christmas holidays in 1965.
“That was the beginning of a wonderful building process,” he said.
“It really was the most important commission that Warren and Mahoney ever received in competition. We became a national practice rather than just Christchurch architects in the process.”
Council rebuild manager David Adamson thought of family moments.
“All my children graduated through this place,” he said.
Regional Manager Steve Taw had memories of soft rock.
“I remember the last time I came here was for a concert. It was George Thorogood and the Destroyers.”
Council chief executive Karleen Edwards said the restoration would improve the Town Hall.
“We all have memories of coming here. We all have a special memory about this place. The city has missed having the Town Hall.
“There is a real opportunity to make this place better than it was.”
The building has been largely stripped back in preparation for the restoration. Carpets have been taken up, the floor of the auditorium has been stripped out and fixtures have been removed and stored. The process has revealed the full extent of how much the floor of the main auditorium warped in the Canterbury earthquakes.
The concrete floor of the auditorium bulges like the top of a sphere. The difference in height between the centre of the bulge and the edge of the floor is about 50 centimeters. Despite this, the walls and structure of the building have remained relatively intact.
The ground beneath the Town Hall will be fixed with more than 1000 jet grout piles, creating an eight-metre deep concrete grid beneath the building. A new concrete slab for the whole Town Hall complex will be poured on top of the new piles.
The Limes Room, which has moved towards the Avon River and risen at one end, will be suspended on scaffolding while new columns are built underneath to make it level again.
The method, invented by MLB Consulting Engineers principal Mark Batchelar, was tested at a site in Colombo St, where a five-story hotel will be built.
TTT Products owner John Reelick, who came up with the idea to use the system for foundations, said a neighbouring business had specified it did not want poles to be drilled into the ground because of the vibrations caused.
Instead, hollow wooden poles were pushed into the ground using a combination of a high water pressure system and a ‘‘high frequency vibrator’’.
‘‘The neighbouring properties don’t feel anything,’’ Reelick said.
‘‘The neighbour was over the moon. It’s the next revolution of deep foundations. It’s a world first.’’
Reelick said the system not only prevented shaking but was also cost-effective at $50 a metre.
The system has been used elsewhere in New Zealand but it was the first time it had been tried in Christchurch, which has ‘‘unique ground conditions’’, , Reelick said.
Neighbouring Braziers Property Investments principal officer Tony Brazier said it was ‘‘certainly a way I would favour putting a pole into the ground’’.