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The 2015 edition of the international BBR Connaect magazine showcases recent NZ and international projects. The theme of this edition is excellence in customer service.....
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Hataitai Bus Tunnel, Wellington
The Hataitai Bus Tunnel was opened in 1907 to connect the expanding suburbs of Kilbirnie and Hataitai to Wellington city.
BBR Contech were engaged by the Wellington City Council to undertake strengthening to the portal walls with work commencing in November 2014. The work scope included:
The project specification required a high level of technical capability and quality control to undertake the full scope of works. This included water-testing of drilled anchor boreholes, preliminary grouting and re-drilling, post-grouting of all ground anchors over repeated cycles, full-scale pull-out tests on Trial Anchorages, load testing and lock-off of DCP production anchors.
Poor ground conditions at some locations were encountered and this lead to additional testing and site survey’s which lead to revised construction details as developed in association with the Engineer.