The Kawakawa Bay Landslip was a 400,000m3 landslip (approximately 30m thick), which was threatening the Kawakawa Bay road and community. We undertook all aspects of geotechnical engineering from site investigations to detailed design of the preferred stabilisation option that comprised unloading 100,000m3 of soil from the head of the landslip, building a 25m high (30,000m3) reinforced earth buttress at the base of the landslip founded on a 12m wide 3m deep shear key, constructing 4,000 lined meters of sub-horizontal bored drainage and restraining the landslide with 45No. Read more
- Multiple New Year Honours Awards
- Kawakawa Bay
- Northern Gateway
- Newmarket Viaduct
We deliver comprehensive wind services from inception to completion. Our project management expertise, coupled with our technical resources, allows us to thoroughly plan, develop and execute planning, investigating, and engineering/design of wind farms. We have been involved in the planning, development and engineering of more than 3,000 MW of wind power in New Zealand alone.
Highlights have included being involved with the first of a new generation of wind farms constructed in New Zealand where turbines in excess of 1 MW were used and conducting the geotechnical investigations for the largest wind farm in the Southern Hemisphere.
The Northern Gateway Road is a 7.5-kilometre section of motorway that traverses land of steep topography which includes significant waterways, and sites of ecological and historic significance.
It was one of New Zealand’s largest and most challenging roading construction projects. The total earthworks reached over 4,000,000m3. Our contribution involved the first known application in New Zealand of pre-cast segmental box girder construction, using a self-launching overhead gantry for erecting pre-cast segments by a balanced cantilever method.
The Newmarket Viaduct, sometimes considered ‘one of the most distinctive engineering features’ of New Zealand is a six-lane State highway viaduct in Auckland, the country’s largest city. Carrying the Southern Motorway over the Newmarket suburb area southeast of the CBD of the city, the 700 m long viaduct is up to 20 m high in places. Due to concerns about its ability to withstand earthquakes and its increasing inability to cater for peak time traffic demand, it is being replaced over a four year period with a stronger and wider structure.
We undertook the detailed design and environmental impact assessment for the Southern International Gateway within the Johor Straits. The project proposal included the removal of the Malaysia to Singapore causeway, two large reclamations and construction of a new bridge.
The site is located in an area of high siltation with marked variations in hydraulics either side of the causeway, which posed numerous geotechnical challenges that our experts overcame. Due to the scale and works, we carried out detailed assessment of the physical effects of the Johor Straits and contributory rivers.
We like to use the latest tools in our playground, which includes the latest numerical modelling software like FLAC 3D and Plaxis. We use them for analysing complex problems, enabling innovative designs to be assessed before construction.
We have analysed many different civil engineering and mining problems, such as deep basement excavations for multi storey buildings through these tools.
Matata Debris Flow Remedial and Mitigation Scheme. On 18 May 2005, the most significant debris-flow event ever to have occurred within a New Zealand urban setting impacted the small town of Matata.
Triggered by a band of intense rain, the debris-flows destroyed or damaged some 100 homes and deposited an estimated 350,000m3 of debris within the environs of the town.