Guidelines for rebuilding the foundations of quake-damaged Christchurch homes have been released.
The Department of Building and Housing guidelines are aimed at engineers and recommend three options for the replacement and repair of damaged foundations.
They are the use of deep piles, site ground improvements, or surface structures with shallow foundations.
The department's chief engineer, Mike Stannard, says each of these foundation types respond differently to various levels of vertical shaking and lateral spreading.
He says structural and geotechnical engineers from New Zealand and around the world have helped create unique guidelines to cope with liquefaction.
Mike Stannard says there has been huge international interest in the geotechnical position in Christchurch.