City Rail Link
CPO 5 Nov 2018 Nth tunnel.JPG

CPO Lower Queen St Construction Update

CPO/ Lower Queen St Construction Update

Here’s what’s happening with the CRL  Downer NZ and Soletanche Bachy JV construction around the former Chief Post Office (Britomart) building

C1 bulk excavation works continue in the trenches within the Chief Post Office (CPO) building and within Lower Queen Street in preparation for upcoming tunnel box construction works.

  LQS: Lower Queen Street construction as seen from the roof of the Chief Post Office building

LQS: Lower Queen Street construction as seen from the roof of the Chief Post Office building


The northern trench within the CPO building is now excavated down to 6m and the temporary concrete floor has been constructed for the upcoming mid-level propping installation.

The corbels (the mid-level propping sits on these) have been installed along the trench walls and installation of the walers (steel beams) running along the edge of the walls is underway.

  NORTH: Final demolition work in the northern tunnel

NORTH: Final demolition work in the northern tunnel


 Once the excavation of the very eastern end of the northern trench (what was the station toilet block) is complete, the installation of the struts across the trench will commence.

  NORTH: CPO/ Lower Queen Street construction - Northern tunnel

NORTH: CPO/ Lower Queen Street construction - Northern tunnel


  WALER: Waler installation in the Northern tunnel

WALER: Waler installation in the Northern tunnel


In the southern trench within the CPO building, bulk excavation continues as does the demolition of the remaining columns and of the old pedestrian underpass.

Southern tunnel demolition
Southern tunnel demolition

SOUTH: Southern trench demolition


 Down below deck in the station B2 platform level we have cut through the existing wall between the station and back of house where enabling works continue.