Industrial News Buzz - Soil exploration and compaction testing by the helical probe test (HPT) has become popular for providing a quick and accurate method of determining soil properties at relatively shallow depths. The HPT test is attractive for field testing on geotechnical projects because it can be performed by one person in less than ten minutes. The torque required to turn the probe is used as a measure of soil characteristics being tested. Preliminary ASTM testing has determined that the HPT method correlates well to standard penetration testing (SPT) and Cone Penetration Testing (CPT) with empirical calibration.

 

Apex Designs HPTs are manufactured using CNC machined auger bits with a 3/4 inch hex driver/extension coupler and alloy steel shafts. The 60 inch long assemblies are TIG welded in fixtures and inspected for straightness to provide consistent, repeatable test results. Extension shafts are available to your specification in lengths up to 72 inches. Apex Designs also offers auger bit replacement services for HPTs to extend the life of your tooling investment.