- Nihotupou Dam
Pouring the pumping station value at Upper Nihotupu Dam for Brian Perry Ltd. Our concrete pump was situated at the top of the dam and we ran a 75mm static pipeline, reducing to a 65mm flexible hose at the end, approx 140 lineal metres down to the pour. Our static line was set up and left onsite for the 6 month duration of the job. More ...
To add to the difficulty of the pours, normal sized concrete trucks could not use the narrow metaled access road down to the dam so they would transfer their 6m³ loads into smaller concrete trucks with 3m³ bowls, and 2 smaller trucks would take turns conveying the concrete to the concrete pump.
- Hobson Sewerage Tunnel
This project was in Orakei for Fletcher Civil Engineering Ltd and involved several different pumping applications over the 18 months we worked onsite. More ...
For us, the project started with the tunnel floor pour of 668m³ which involved the use of three Boom pumps with 5.5" static pipeline attached to the shaft face, approx. 46 metres down to the bottom of the shaft. This pour took just under five hours to complete.Other applications involved craning our shotcrete pump and equipment to the bottom of the tunnel where shotcrete was used to stabilise the walls. 20mm Line pumps were also craned to the bottom of the tunnel and used for pressure pumping of the tunnel liner on a slip form using gate valves. For all work where the pumps where craned into the tunnel, concrete was delivered via a 2m³ skip.
Another feature of the tunnel was the pouring of the ring wall and baffles from the floor of the shaft climbing to the surface in 3 metre lifts using a concrete pump at the tunnel surface pumping down to the satalite boom on the tunnel floor. The pours were 200m³ each.
- North Shore sewerage outlet
This job for McConnell Dowell Constructors Ltd involved several different concrete pumping applications. For the pipeline off Browns Bay, our pumps were barged out to the job, staying on the barge for up to a couple of weeks at a time. Our operators would be boated out to the barge prior to commencing the pours. More ...
The pours required specially designed concrete mixes as they were all underwater. Divers were used to place the concrete around the pipeline on the sea floor. We used three different pumping systems to accomodate the different underwater pours being done.
The first pours were large quantities which required a Boom pump being supplied by skip, via a helicopter. This was loaded from JF Kennedy Park with 2m³ skips, flown out to the pump on the barge, and discharged into the hopper.
We then changed to using premixed material which was loaded onto the barge as dry material in 2m³ bags. When ready to pour, the premix was craned into an empty concrete truck, water added, mixed and discharged into our pump.
The 3rd system used was with a Kingsite mix truck. All materials were loaded onto the barge, mixed onsite and discharged into the pump. We used both Boom pumps and Line pumps with this system.
- Northern Busway
- Greenhithe Bridge
- All motorway junctions from city to Newmarket/spaghetti junction
- Hunua water treatment tunnel
- New Lynn train station
- Stormwater Upgrade at Davis Crest
- Rosedale outfall