Auger

METHOD STATEMENT OF HAND AUGER AND SAMPLING

Equipment

The equipment consists of a manual auger tool that is made up of an augering bit. It can be joined with screw-type connectors to 1 metre sections to extend the length of the tool as augering progresses. This method has an augering depth of 3 – 5m depending on the type of soil present.

Conduct of Auger Hole

The auger tool is of 100mm diameter attached to rod sections and the tool is manually rotated while applying vertical pressure to it. This enables the tool to cut the soil and the cuttings are stored in the hollow central compartment of the auger tool. When the auger is filled, the tool is extracted from the ground and the cuttings removed / flushed from the central compartment.

Casings are not used in this method. Therefore, soils of unstable nature may not be suitable for this auger method.

Sampling of soils

Samples and details of the soil strata of the hole drilled shall be recorded in the boring records as the augering is conducted. Sample tubes of 75mm diameter are employed to extract undisturbed samples. They are manually pushed into the ground and pulled out.

Backfilling of auger holes

The auger holes will be back-filled with the soil that was removed from the auger hole.

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