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Geotechnical ADH SPT Split Spoon Sampling System

Geoprobe® direct push machines outfitted with a DH-Series Automatic Drop Hammer can be used to perform the Standard Penetration Test (SPT). Use either a hollow stem auger setup or our 3.25 in. probe rod system.

Standard Penetration Testing

Geoprobe® 3.25 in. Probe Rods
3.25 in. probe rods are driven to the desired testing depth. The solid drive tip is pulled and a split barrel sampler is lowered. The drop hammer is then placed on top of the rod string and the number of blows to advance the sampler is counted. The solid drive tip can then be placed back in the cutting shoe and the rod string advanced to the next testing depth.

Hollow Stem Augers
Hollow stem augers are turned to the desired depth with a pilot bit blocking the rod ID. The pilot bit is pulled and a split barrel sampler (split spoon) is lowered. The drop hammer is then placed on top of the rod string and the number of blows to advance the sampler is counted. The pilot bit can then be placed back in the augers and the auger string advanced to the next testing depth.

Sampler
This sampler is commonly referred to as a split spoon sampler. Used for sampling with the DH-Series Automatic Drop Hammers and SPT Systems. The SPT blow count is the number of blows of the automatic hammer required to advance the split barrel sampler 12 inches (305 mm).

  • 2.0 in. (51 mm) OD x 24 in. (610 mm) length
  • AW Box at top.
  • Requires Adapter (17320) if used with 1.5 in. probe rods.

Key Features

    • Use either a hollow stem auger setup or our 3.25 in. probe rod system
    • This sampler is commonly referred to as a split spoon sampler

Tool String Diagram

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Parts

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1.5 SWIVEL PULL CAP
MN: 209748

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Geotechnical ADH SPT Split Spoon Sampling System

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