For collecting undisturbed samples of 38mm dia. for Triaxial Shear strength and Unconfined compressive strength either straight from the field or from a sample of larger diameter.

The wall thickness is maintained approximately 1.6 mm with an area ration approximately 17 percent.

Both relieved and unrelieved sampling tubes are avaiLable.

In the relieved type of tube, the internal diameter is relieved by about 0.5 mm (inside clearance 2%) beyond approx. 19mm length from the cutting edge of the tube.

This is most suitable for highly cohesive soils.

In the unrelieved type, the internal diameter is uniform through out.

This type is most suitable fro soils of low cohesion.

These 38mm dia.

These 38 mm dia. Tubes are avaiLable in different lengths.

Unrelieved: (a) 150 mm (b) 200 (c) 225mm (d) 30mm long.

Relieved: (a) 150 mm (b) 200 (c) 225mm (d) 30mm long.