Undisturbed Sample Test

Undisturbed Sample Test
The Undisturbed Sample Test is a laboratory test performed on soil samples taken in a method that retains its natural structure, moisture content, and stress level. These samples are often collected using thin-walled tube samplers, Shelby tubes, or block sampling procedures in accordance with ASTM D1587 or BS 1377-1. Engineers may use undisturbed samples to analyze critical soil properties including compressibility, shear strength, and permeability under actual field settings. These tests are required for the proper design of foundations, embankments, retaining structures, and other geotechnical systems. They give more accurate data than disturbed samples, especially in cohesive soils where soil behavior is strongly structure-dependent.

Advantages of Undisturbed Sample Test:

• Maintains natural soil conditions for proper testing.
• Essential for high-precision geotechnical analysis
• Offers accurate figures for strength and deformation.
• Useful for settlement and consolidation projections.
• Promotes safe and cost-effective foundation design.
• Ensures quality control for key soil evaluations.
• Suitable for a wide range of advanced laboratory testing.