EN ISO 22476-10:2017 PDF

Overview

EN ISO 22476-10:2017 - "Geotechnical investigation and testing - Field testing - Part 10: Weight sounding test" specifies the equipment, execution and reporting requirements for the weight sounding test (manual or mechanized). The standard applies to natural soils, made ground and fill, on land or water, and fulfils requirements for geotechnical investigations according to EN 1997‑1 / EN 1997‑2. Typical uses include producing a continuous soil profile, indicating layer sequence, estimating density of cohesionless soils and locating very dense layers that indicate end‑bearing pile lengths.

Key topics and technical requirements

• Scope & purpose
  • Determines soil resistance to static load and to static load with specified turning of the sounding point.
  • Provides guidelines for continuous profiling and density estimation.
• Penetrometer point
  • Standard screw-shaped point dimensions (circumscribed circle ≈ 35 mm; length ≈ 200 mm; twisted one turn to the left over 130 mm); manufactured from high‑strength steel. Wear limits are specified.
• Loading systems
  • Manual test weights: standard set totalling 1 000 N (50 N clamp/handle, two 100 N and three 250 N weights).
  • Mechanized tests may use a dynamometer (measuring range up to a minimum of 1 100 N).
• Rods and measurements
  • Rod diameter 22 mm, weight ~2.5 ± 0.5 kg/m; extension lengths typically 1.0–2.0 m (first rod may be 0.8 m).
  • Depth measurement accuracy and straightness/tolerance requirements are specified.
• Test procedure
  • Pre‑test calibration and equipment checks; calibration records retained.
  • Predrilling and casing when required (e.g., dry crust or made ground) - depth and use to be recorded.
  • Manual load steps: 0, 50, 150, 250, 500, 750, 1 000 N; penetration rate should be 20–50 mm/s.
  • If resistance > 1 000 N or penetration at 1 000 N