Open tube driven-in soil samplers, for sampling clay and other cohesive soils. Sample tubes are 18" (457mm) long and are driven into the ground using a sliding hammer with attached drive head. The drive head incorporates an overdrive space and a ball valve to allow air to be released from the upper part of the sample tube as it is driven into the ground.
A cutting shoe is screwed onto the lower end of the sample tube, and a corecatcher (optional) fits between the sample tube and the shoe. The corecatcher has four hinged flaps around its circumference. These flaps prevent the sample escaping from the tube when the apparatus is raised from the borehole.
U100 Plastic Liner System
The sample tube is replaced with a "Body Tube" that contains arigid plastic liner. The liner containing the soil sample can be quickly removed from the body tube and replaced with an empty liner after each sampling event. Shoes and core catchers are made from a thicker wall material than those of the standard system. A spacing ring is required to fit inside the recess of the cutting shoe when the corecatcher is being used.
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