TRANSPOWER TUNNEL STRENGTHENING

Client Transpower
Project Value $1.2 Million
Description The existing reinforced concrete cable tunnel that is located under the Botany shopping centre was cracking and showing signs of potential failure. March Cato submitted a design and build proposal to Transpower to strengthen the tunnel using steel liner segments, winched into place and grouted.
Relevant features

Work undertaken included:

  • Construction of two deep sheet piled launching shafts.
  • Confined space tunnelling and robust health and safety systems were required.
  • The liners had to be winched up to 200m and sealed against the adjoining liner. This was further complicated by curvature in the tunnel.
  • A special grout mix was designed to achieve the required strength while maintaining the appropriate viscosity for pumping.
 

TORPEDO BAY SEAWALL AND OUTFALL

Client: North Shore city
Project Value: $900,000

This project won the 2012 INGENIUM Excellence Award for Construction Projects under $2 Million.

Read full case study

 

HUNUA 4 WATERMAIN

Client: Watercare Services Ltd
Project Value: $43 Million

"Any of the team I've spoken with... have been courteous, considerate and helpful... even beyond 'good work-practice' requirements."
- Grateful Resident

Read full case study

 

THE PARADE STORMWATER OUTFALL AND PIPELINE

Client: Auckland Council
Project Value: $5.3 million

This project involved the installation of a new stormwater pipeline and ...

Read full case study