Skip to Navigation
Skip to Content

Sutton Quay - Lyttelton - retaining wall repairs

Printer-friendly version
What
Repairs to the earthquake damaged heritage retaining wall
Where
Sutton Quay, Lyttelton
When
From August until December

Where we are working

Map. Sourced from LINZ data, Crown Copyright reserved. Work area (red): part of the southwestern side of Sutton Quay (near the intersection with Norwich Quay).

How we will fix the wall

  • A ramp has been installed to sit the drill rig on.
  • Stonemasons will deconstruct the heritage parapet wall.
  • Soil nails will be installed. This involves drilling and grouting a series of fibreglass bars into the soil or rock behind the retaining wall. The nails help strengthen the wall.
  • Dual layers of shotcrete will be applied. Shotcrete is a mixture of cement, aggregate, and water conveyed by compressed air to a spray gun.
  • Stonemasons will rebuild the heritage parapet wall.

How we install soil nails

  1. A drill rig will drill a hole into the soil behind the wall:
    Soil behind the retaining wall.
  2. The soil nail will be installed in the drilled hole and grouted:
    The nail is secured in place with grout, from a grout mixer and pump.
  3. After the grout has cured, the soil nail can be tested:

The ramp below the heritage retaining wall to install the top row of anchors:
Photograph of ramp.

Heritage parapet wall to be carefully deconstructed and rebuilt with the help of stonemasons:
Photograph of heritage parapet wall.

Photographs from similar work

A drill rig:
Photograph of drill rig.

Anchors and shotcrete:
Photograph of wall with protruding anchors.

Shotcrete surface:
Photograph of wall surface.

Need more information?

Call Fulton Hogan on:
0800 277 34 34 (8.30am–5.00pm Monday–Friday)
Email Fulton Hogan:
[email protected]
Visit the SCIRT website:
www.strongerchristchurch.govt.nz

Start date: 
Mon, 15/08/2016
Project numbers: 
10937