Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


New Liquefaction Report Will Help With The Rebuild


January 31, 2013

MEDIA STATEMENT
New Liquefaction Report Will Help With The Rebuild

Environment Canterbury today released a review of liquefaction information for Christchurch and neighbouring districts outside the green and red zones.

The review report maps areas where building projects will no longer need expensive 15-metre deep ground tests and other areas where these tests will still be required.

The report covers 20 years of liquefaction studies and draws on the experience of the 2010 and 2011 Canterbury earthquakes. Environment Canterbury Commissioner Donald Couch says the report provides an up-to-date assessment of the need for geotechnical investigation of liquefaction-susceptible ground in eastern Canterbury.

“This comprehensive piece of work gives our communities better information for those considering building outside areas already zoned by the Canterbury Earthquake Recovery Authority,” Mr Couch said.

The main purpose of the report is to provide territorial authorities and communities with general guidance on where geotechnical investigation and engineering assessment of liquefaction potential may or may not be required for plan changes, and for subdivision and building consents. It may also be useful for lifeline utility and emergency management planning.

“The report covers the Christchurch City Council area, including Banks Peninsula, and eastern parts of the Waimakariri, Selwyn and Hurunui districts, but does not include other parts of Canterbury or land that has already been zoned by CERA,” Mr Couch said.

“A map in the report shows areas of solid ground where damaging liquefaction is unlikely and areas of more variable ground quality where liquefaction assessment is needed during site investigations.”

This means that for many areas of Canterbury, fewer deep geotechnical investigations will be required than at present, while those that are carried out will be better targeted.
“You might still need a shallower geotechnical investigation for other hazards though – for example, for susceptibility to flooding or land subsidence,” Mr Couch said.

Kelvin Berryman of GNS Science says his organisation, and the Natural Hazards Research Platform he chairs, were pleased to be involved in co-ordinating and funding the report. “I am sure the results of this collaborative effort will be very helpful for the Christchurch rebuild and appropriate building work throughout Canterbury,” Dr Berryman said.

Environment Canterbury has been liaising closely with territorial authorities, CERA and the Ministry of Business, Innovation and Employment to help inform their natural hazards and building consenting activities.

“It is pleasing that this collaborative work is resulting in the development of consistent processes through MBIE’s Building & Housing Guidelines, which now include a section on liquefaction testing specifically taking account of this report,” Donald Couch said.

“The practical effect of this is that costly investigations will no longer be done in areas where they are not needed and will be focused on areas where they can ensure appropriate building solutions. This is the way it should be in helping make sure our buildings are as safe as possible for the future of Canterbury.”

For more on the report and related information go to www.ecan.govt.nz/liquefaction

For the revised Building & Housing Guidelines, go to (16.2)
http://www.dbh.govt.nz/UserFiles/File/Publications/Building/Guidance-information/pdf/canterbury-technical-guidance-subdivisions-part-d.pdf

Background

The occurrence of liquefaction depends on whether underlying soils include liquefiable sediments, which have very distinctive characteristics, and whether these sediments are saturated by water.

The area where future “design-level” earthquakes (http://ecan.govt.nz/advice/emergencies-and-hazard/earthquakes/Pages/liquefaction-faqs.aspx#seven) are unlikely to cause land damage from liquefaction includes the western part of the project area and most of Banks Peninsula.

The area where future design-level earthquakes may cause ground damage from liquefaction (and the effects may be complex and damaging to ground, buildings and infrastructure) includes the eastern part of the project area and some low-lying areas of Banks Peninsula.

The Natural Hazards Research Platform is the funding body that co-ordinates central government natural hazards research funding. It includes GNS Science, NIWA and tertiary sector organisations.

ENDS

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

 

Parliament Today:

The Kids: OECD Report Shows Huge Impact Of Poverty On Education

A new report from the OECD has again highlighted the negative effects of poverty, showing that disadvantaged children in New Zealand are more than six times more likely to underachieve in maths than children from wealthier homes. More>>

ALSO:

Pacific: NZ Pledges $500,000 To Help Address Zika

“With the Zika virus now confirmed in a number of Pacific countries, New Zealand is committed to helping limit the impact and spread of the virus in the region,” says Mr McCully. “New Zealand will provide $250,000 as a contribution to the WHO to implement the Pacific Zika Action Plan, and a further $250,000 to enable countries in the region to respond rapidly if required." More>>

ALSO:

Labour: Police Commissioner 'Doesn’t Get Force Needs'

The Police Commissioner has let down the public and his own force by insisting the police have what they need despite it taking a year to solve a burglary and overwhelming number of officers saying they are under-resourced, says Labour’s Police spokesman Stuart Nash. More>>

ALSO:

Gordon Campbell: On The US Pressure To Expand Our Role In Iraq

Foreign news services are being more forthcoming about what the “next 12 months” will entail – essentially, the defence ministers will be under US pressure to increase their “training” role preparatory to an assault on the city of Mosul in northern Iraq. More>>

ALSO:

Parliament Restarts: Prime Minister’s Statement

Our policy agenda and legislative programme will reflect the Government’s four priorities: • to responsibly manage the Government’s finances • to build a more competitive and productive economy • to deliver better public services to New Zealanders, an • to support the rebuilding of Christchurch. More>>

ALSO:

NZEI Survey Report: Special Needs Students Missing Out

The survey revealed that around 16 percent of students were on schools’ special needs registers, but nearly 90 percent of schools’ special needs coordinators did not believe there was adequate support for students and their learning... More>>

ALSO:

Interim Report: Waitangi Tribunal On Ture Whenua Legislation

Labour on Proposed changes to Maori land rules: “To have Treaty Negotiations Minister Chris Finlayson dismiss findings as ‘bizarre’ is totally disingenuous and disrespectful. What’s bizarre is Maori Development Minister Te Ururoa Flavell stubbornly pushing through this Bill before the Waitangi Tribunal has even completed its report..." More>>

ALSO:

Spy Update: Appointment Of GCSB Acting Director

GCSB Chief Legal Advisor Lisa Fong will become the Acting Director of the Government Communications Security Bureau (GCSB) from 15 February 2016, Minister Responsible for the GCSB Christopher Finlayson announced today. More>>

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news