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

 

Two Years With New Methods: Crime Stats Show Increase Led By Burglary

The two years of data show an increase in the total victimisation rate of 3.1 per cent, with 12,060 more victimisations in the 2015/16 year when compared to 2014/15 year. From this increase, 72 per cent is attributable to burglaries. More>>

ALSO:

Auckland Relocation Grants: 12 Grants Paid So Far

Since the policy took effect one month ago, 12 applicants have received the non-recoverable grant, supporting 32 people. $54,508 has been paid out, covering things like moving costs, bond, rent in advance and letting fees. More>>

ALSO:

Vaccine Funding Change: HPV Vaccines For All Children

PHARMAC has today announced changes to funded vaccines, which will benefit an extra 100,000 people... The human papillomavirus (HPV) vaccine will be available for all children and adults up to the age of 26 years, and boys will now be included in the HPV school vaccination programme. More>>

ALSO:

Gordon Campbell: On Why The Opinion Polls For Key And Trump Defy Gravity

What is going on? Donald Trump got confirmed as the Republican presidential candidate at a bizarrely chaotic political convention… and promptly received an upwards bump in the polls to where he’s now rating ahead of Hillary Clinton, for only the second time this year. More>>

Sugar: Auckland Leisure Centres Axe Unhealthy Drinks

Auckland Council is to stop selling drinks that are sweetened by sugar from vending machines at its leisure centres in a bid to try to reduce obesity and type 2 diabetes... More>>

ALSO:

Gordon Campbell: On Todd McClay’s Faulty Memory

Time and again, whenever an issue arises the initial response by government is to deny or diminish the problem – nothing to worry about here, everything’s OK, move on. Then, hang on. In line with the usual pattern, as embarrassing details emerged into daylight, the story changed. More>>

ALSO:

Labour's 'Future Of Work': Major Reform Of Careers And Apprenticeships

The next Labour Government will transform careers advice in high schools to ensure every student has a personalised career plan, Leader of the Opposition Andrew Little says. More>>

ALSO:

State Investments Management: Treasury Likes IRD, Not Education Or Corrections

The Inland Revenue Department has scored an 'A' in the first tranche of the Treasury's investor confidence rating for state agencies that manage significant Crown investments and assets, gaining greater autonomy as a result, while the Corrections and Education ministries gained a 'C' rating. More>>

ALSO:

Govt Goal: NZ To Be "Predator Free" By 2050

Prime Minister John Key has today announced the Government has adopted the goal of New Zealand becoming Predator Free by 2050... “That’s why we have adopted this goal. Our ambition is that by 2050 every single part of New Zealand will be completely free of rats, stoats and possums." More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news