What Auckland clients say
“Sam and the team at Chambers Consultants are absolute professionals and provide excellent service and communication. They helped us recently with a complex pre purchase inspection and saved us from making a big mistake!”
Jeremy M., Google review
“The team was professional, reliable, and delivered high-quality results on time. Very responsive and easy to work with—I highly recommend them for any geotechnical needs.”
Hossein G., Google review
“Good reliable Consultant Engineers, technically sound.”
Shahid A., Google review
Read all reviews on Google · Geotechnical engineers in Auckland · What a geotechnical report costs
Frequently asked questions
What soil tests are used for foundation design in New Zealand?
Field testing typically includes Scala penetrometer, standard penetration testing, shear vane and cone penetration testing. Laboratory testing commonly covers moisture content, Atterberg limits, particle size distribution, undrained shear strength, consolidation and, where earthworks are involved, compaction testing to NZS 4402. The combination used depends on whether the question is bearing capacity, settlement, slope stability, liquefaction or fill suitability.
What is a good ground bearing capacity for a house?
NZS 3604 defines good ground as ground with an ultimate bearing capacity of at least 300 kPa that is not subject to erosion, subsidence, slippage or liquefaction, is not made ground or fill other than well compacted hardfill, and is not on a slope steeper than about 1 in 5. If a site meets that definition the standard foundation details in NZS 3604 can be used. If it does not, specific engineering design is required, which is a common trigger for a geotechnical report.
Can soil testing tell me if my site will liquefy?
Liquefaction assessment requires the right kind of data. Cone penetration testing with groundwater measurement is the usual basis, sometimes supported by boreholes with SPT and laboratory grading. The assessment combines the soil profile, the groundwater depth and the design earthquake shaking for the site to estimate triggering and the resulting settlement or lateral movement. A Scala penetrometer test alone is not a liquefaction assessment.