Thick-walled samplers are used for

Thick-walled samplers are used for

• A. Disturbed but representative soil samples
• B. Undisturbed clay samples
• C. Gas samples
• D. Rock cores

Answer: (A)

Thick-walled samplers are chosen when the goal is to obtain a sample that represents the soil’s properties over a volume, even though the structure of the soil will be disturbed during retrieval. The thicker walls provide strength for sampling in a range of soils and help capture a usable sample without collapsing, but this process disturbs the soil fabric, so the resulting sample is not preserved in its in-situ structure. This makes them well-suited for getting representative samples for laboratory tests that don’t require intact structure, such as many index-property and grain-size analyses. In contrast, preserving undisturbed soil structure—especially for clays—typically uses thin-walled samplers; gas sampling requires specialized equipment to avoid contamination or loss; and rock cores come from rock-coring methods rather than thick-walled soil samplers.

Thick-walled samplers are chosen when the goal is to obtain a sample that represents the soil’s properties over a volume, even though the structure of the soil will be disturbed during retrieval. The thicker walls provide strength for sampling in a range of soils and help capture a usable sample without collapsing, but this process disturbs the soil fabric, so the resulting sample is not preserved in its in-situ structure. This makes them well-suited for getting representative samples for laboratory tests that don’t require intact structure, such as many index-property and grain-size analyses. In contrast, preserving undisturbed soil structure—especially for clays—typically uses thin-walled samplers; gas sampling requires specialized equipment to avoid contamination or loss; and rock cores come from rock-coring methods rather than thick-walled soil samplers.