GTA maintains a new exploration tool to complement its fleet of drilling equipment. GTA can provide electronic Cone Penetrometer Testing (CPT) using a track-mounted 15-ton CPT rig.
This technology allows GTA to perform geotechnical and environmental subsurface characterization more rapidly and efficiently than with conventional borings. The CPT Probe consists of a 1.5-inch diameter cone which is pushed into the ground using a hydraulic ram. Tip and sleeve resistance, and pore water pressures are recorded at penetration intervals of two centimeters, resulting in a nearly continuous record of subsurface conditions. With the CPT data, GTA can interpret soil engineering properties including soil type, stratigraphy, and shear strength.
ON SITE ANALYSIS
Daily production of CPT soundings generally range from 200 to 500 linear feet, which is two to five times more coverage than conventional drilling methods. The 15-ton rig allows for exploration depths up to 100 feet in unconsolidated materials. Soil strength parameters can be retrieved immediately for instantaneous evaluation of subsurface conditions by utilizing an on board computer. Sites can be quickly screened with the CPT rig, allowing GTA to optimize the efficiency of the soil sampling program.
GTA designed the CPT rig to access difficult sites utilizing a track-mounted platform, and GTA can perform testing on sites inaccessible to conventional truck-mounted rigs.