Geotechnical Testing
Geotechnical Testing
Gregg Drilling offers a number of specialized tests for geotechnical investigations. All are combined with standard rotary drilling techniques to implement the equipment. These tests include:
- SPT Energy Calibration/Hammer Calibration
- Vane Shear Testing (VST)
- Pressuremeter Testing (PMT)
Gregg also offers Dilatometer testing (DMT) and Seismic DMT which can be advanced with the CPT equipment or direct push methods.
SPT Energy results are often low in the top 5-10ft when rod lengths are short
Energy results vary depending on the depth of the sample and soils encountered
For accurate results, equipment should be tested on your specific site
Auto-hammers often average much higher energy around 80-95%
Gregg’s vast experience drilling throughout California and exceptional safety rating provides the confidence and trust our clients have learned to value.
Gregg constantly strives to maintain one of the highest safety ratings across California. Recently Gold Shovel Certified, Gregg is constantly improving our safety program and equipment to provide our clients the highest quality service available. Gregg’s employees have some of the most extensive safety training available and are able to work on refineries, military sites, railroads and confined spaces. Gregg Drilling Specifications
Download our equipment specifications to learn more about our services offerings.
Sonic Drilling – Track-mounted
Click to download the Sonic Drilling – Track-mounted Datasheet
Sonic Drilling – Truck-mounted
Click to download the Sonic Drilling – Truck-mounted Datasheet
We’re ready for you
With over 35 years experience drilling in California and surrounding states, Gregg Drilling can handle any size project. We hope to demonstrate our value through quality equipment, knowledgeable and experienced personnel and our exceptional safety standards
