CCNZ / HIREPOOL CONSTRUCTION EXCELLENCE AWARDS 2016
Celebrating Construction Excellence
CONSTRUCTION EXCELLENCE AWARDS 2016
WINNERS
We thank the awards judges: Category 1, 2 and 5, Dave Macdonald and Paul Bishop; Category 3 and 4, Steve Hart and Alan Powell. Their comments on the winning entries are summarised below. Category 1: Projects with a value of less than $1 million. WINNER: Groundfix for Waterview Tunnel – Cross Passage Drilling and Pressure Grouting The Waterview Tunnel is a $1.4 billion project being delivered for the NZ Government by the NZ Transport Agency and a consortium of contractors working as the “Well Connected Alliance”. During the first tunnel drive, high ground water flows were experienced near the tunnel midpoint where cross passages were to be constructed. Work within the cross tunnel passages during excavation and lining processes would have been extremely difficult without a reduction of these ground water flows. A project to drill through the tunnel lining to within 300 mm of the adjacent tunnel wall and pressure grout the rock fissures between the tunnels was entrusted to Groundfix. Grouting through carefully sequenced patterns of drill holes with specially designed grouts successfully sealed out the water allowing for the construction of the required cross passages. Groundfix performed this work in a timely, efficient and businesslike way, working with the client to reduce cost and perform the work in a safe and environmentally friendly manner. Working and safety conditions within the tunnel were especially rigorous but Groundfix was able to comply with these at all times to produce the required result. The work was completed ahead of time with twice the number of cross tunnel passages sealed to what was originally envisaged. The client spoke particularly highly of Groundfix’s collaborative approach, and was very pleased with the work they carried out for the Alliance.
Category 2: Projects with a value between $1 million and $10 million WINNER: McConnell Dowell for Waitaki Erosion Remediation Meridian Energy is upgrading this power station to give it another 80 years of life. McConnell Dowell were engaged through a D&C process using NEC3 to resolve erosion problems on the right bank and sluice pier while the station maintained its full power generation. Through all phases from planning to delivery McConnell Dowell engaged fully with the client and used very robust and well thought through processes to identify and manage the risks around working within an operating station, managing the difficulties and challenges of construction and in ensuring the quality required was delivered. Access was challenging especially for the sluice pier works as there was no ability to work from within the river due to limited time being available to clear the site under emergency opening of the sluice wall. Meridian adopted McConnell Dowell’s proposal to change the concept design for the sluice pier to one requiring the installation of a high lift fixed crane on the pier and to construct an interlocking drilled pile curtain wall fully encasing the pier to eliminate erosion of the underlying unprotected ground. A very detailed plan measured (and re-measured) with precision allowed craneage to occur for construction which included very complex temporary works. From design to construction, safety was a key focus for the whole team and with constant attention the rewards of an incident free site were obtained. The client was very pleased with the outcome and on time delivery. 4 Civil Contractors NZ in association with Contractor magazine
