OVERVIEW

  • ISO 22476-1:2022 is the latest update to the Cone Penetration Test (CPT) standard.

  • Builds on ISO 22476-1:2012, introducing significant changes to testing, calibration, and classification.

  • ConeTec continues to be the first to adopt this standard worldwide, with our Australia and North America operations being second only to Lankelma to conform to this standard.

  • Integrating this new standard introduces a new level of accuracy and reliability in CPT testing.

KEY CHANGES

  • Redefined Cone Penetrometer Classes with quantified uncertainty levels for each class to emphasize data reliability and standardization for global comparability.

  • Introduction of Test Categories (A, B, C, D) ensures that testing accuracy and data quality match the complexity of the geotechnical design.

  • Thermal Stability and Transience with details on handling ambient and frictional heating effects.

  • While the Calibration Protocol calls for 100 calibration points evenly spaced across the load range improving precision, ConeTec has added additional points at the low end of the loading range.

  • Updated cone geometry requirements to reduce variability in stress calculations.

  • Field Procedure Updates, including

    • Mandatory 60-second zero readings at the beginning and end of each test.
    • Depth verification with emphasis on verticality and accurate profiling.
    • Other improvements to mandatory field procedures and reporting requirements.
    • Measurement of cone dimensions (Class 0).

Comparison of the Standards

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