Pipe Renewals Guidelines

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In 2014, the total replacement value of the 3 waters assets in New Zealand was estimated to be about NZ$45.2 billion. As these assets are upgraded or replaced, many difficult decisions will need to be made in respect to the trade-offs between Levels of Service, capital costs, operating costs and management of risk.  The aim of this project is to provide guidance and tools to enable New Zealand Water organisations to implement advanced asset management processes to develop inspection, maintenance and renewal strategies for pipework in potable water, waste water and storm water systems.

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Seismic Performance of Reinforced Concrete Coupled Walls

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In the Canterbury Earthquakes it was observed that reinforced concrete coupled wall buildings displayed more strength and lower ductility in comparison to their design intent.  As an approximate method to account for axial restraint in the design of coupled walls it is recommended that a redistribution of design demands be used to reduce the coupling beam design capacity and to achieve a more desirable coupled wall behaviour.

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Seismic Pressures on Retaining Walls

General Copyright

Context Learning from the Christchurch Earthquake sequence and other disasters has highlighted the need for New Zealand’s 3 Waters Services to be seismically resilient. In the context of these guidelines the key aspects of a resilient system are: Robust physical assets with key network routes having appropriate alternatives, and response arrangements in place Effective co-ordination

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