ASTM D1587 Thin-Walled Tube Sampling: A Quick Guide

The ASTM D1587 standard outlines the practice for thin-walled tube sampling of fine-grained soils, ideal for geotechnical purposes. This method is designed to recover relatively undisturbed soil samples for laboratory testing of key engineering properties like strength, consolidation, permeability, and density.

Key Components and Procedure

Utilizing a thin-walled metal tube (e.g., Shelby tube), along with piston, plug, or rotary-type samplers, the process often involves rotary drilling or hollow-stem augers. The procedure includes advancing the borehole to the desired depth, inserting the tube into the soil, extracting it with an intact sample, and preserving it by sealing and storing to maintain integrity.

Data and Applications

This technique provides intact samples for lab analysis, with quality depending on soil type and sampling skill. It’s widely used for geotechnical testing to assess soil properties for design and construction, as well as subsurface exploration to evaluate deep soil conditions.

Advantages and Limitations

The method offers minimal disturbance, preserving soil structure for accurate testing, and versatility with various drilling methods. However, it’s limited to fine-grained soils and unsuitable for coarse sand, gravel, or hard soils. Success hinges on operator skill and soil conditions.

Safety Considerations

Proper handling of drilling equipment and tubes is crucial to avoid injury or sample loss.