How does a sampling rig work?

Using the rig hydraulics, the sliding carriage is raised and the sample tube is screwed onto the anvil adaptor. The carriage is then lowered until the cutting edge of the sampling tube rests on the ground surface. The hydraulic cylinder is lowered and the drop-weight is activated, driving the sampler into the ground.

How does a soil sample rig work?

The rig has the facility to drive casing into the ground, simultaneously with a soil sample tube. Using this system means that any overburden/loose ground can be sampled without hole collapse, ensuring that successive samples are accurate from the depth taken.

How deep can a rig sample a borehole?

The rig is adept at sampling on slopes and embankments up to 20 degrees. However, the method is limited in the depth and diameter of sampling that is possible. The maximum borehole diameter produced by the Competitor is 130 mm, and the maximum sample diameter is 100 mm, reducing as the borehole becomes deeper.

What is the purpose of a soil drilling method?

This drilling method aids visual identification of changes in the soil formations. In all instances, the cuttings and the reaction of the drilling equipment should be regularly monitored to identify stratification changes between sample locations. Figure 3-1.

What types of soil samplers are available for geotechnical engineering projects?

A wide variety of samplers are available to obtain soil samples for geotechnical engineering projects. These include standard sampling tools which are widely used as well as specialized types which may be unique to certain regions of the country to accommodate local conditions and preferences.

Can a competitor drill be used in a concrete rig?

The Competitor can be used in conjunction with a concrete core drill fastened to the anvil at the base of the rig. This enables hard surfaces to be cored prior to sampling or testing the ground underneath. There is however no facility for rotary coring of the sub-surface at depths greater than 1 metre BGL.