GCL has extensive knowledge of and practical experience in providing commensurate geotechnical and geological advice to individuals, land developers, structural and civil engineers, commercial builders and construction companies. We have delivered on over 3000 projects across the Auckland, Waikato and Bay of Plenty regions and as such, understand the challenging ground and soil conditions in these areas. We offer the the following geotechnical services…

• Site walkovers and desktop studies

  Often the very first step in the line of investigations, the site walkover and desktop study can provide rapid assessment of a site in terms of the geotechnical, geological and environmental constraints and opportunities that exist on any one site.

• Geological and geomorphological mapping

  Mapping provides a very cost effective way of further evaluating individual sites through to large subdivisions, identifying and delineating areas of concern such as slope instability, problematic ground conditions, and previous land use that can be invaluable when it comes to understanding and predicting the behaviour of the ground during subsequent development. It is also essential when targeting our site investigations to ensure they return the most pertinent information on the site.

• Geotechnical site investigations

  We undertake site investigations for all manner of sites, from the individual house plot, through to large scale land development schemes. We employ commensurate techniques of investigation, including hand augers and Scala penetrometer equipment undertaken by our own field staff, through to supervision or commercial drilling and CPT rigs for projects where deeper investigation is required.

• Geological ground modelling

  Developing a robust ground model for any site, regardless of its size or complexity, is essential to ensure appropriate engineering design is adopted to address the ground conditions and the sites’ geological development and history. The ground model is the culmination of the desk studies, mapping, investigation, interpretation and engineering judgement, which enables the most appropriate design parameters to be assigned and engineering solutions to be tabled.

• Slope stability and settlement analyses

  Where necessary, GCL will undertake numerical slope stability and settlement analyses of the more complicated sites, to ensure that the site under investigation is deemed safe and stable for subsequent development or construction.

• Professional Reporting

  GCL provides site specific geotechnical interpretive reports detailing our site investigation work, assessment and analysis that culminates in recommendations being made for foundations, slope stability, retention structures and earthworks, all of which allow the civil and structural consultants to design appropriately. Our reports are also tailored to provide sufficient and pertinent information for the Resource Consent processes.

• Earthworks, foundation & construction monitoring, testing & certification

  Our service doesn’t stop with the reporting. We can provide further support to the client and contractors on site by undertaking construction observations and field testing to approve the progress of a construction project and its alignment with the geotechnical recommendations and consent requirements.

• Geotechnical Completion Reports (GCRs) and provision of PS1 and PS4s

  GCL can provide Geotechnical Completion Reports whereby we certify the finished works for any project as well producer statements (PS1 and PS4s) for Auckland, Waikato and Bay of Plenty based projects.

• Independent and Peer reviews

  Our Principals are experienced and well practised in providing both independent and peer review for geotechnical investigation and reporting. This includes preparation of Peer reviews and undertaking the role of Expert Witness aligned with IPENZ Practice Note 02.