Geotechnical Drilling Rigs
Geotechnical drilling and geotech sampling built for speed and efficiency.
The Geoprobe® 3100GT Geotechnical Rig is designed to quickly perform geotech SPT borings (augers & mud rotary), collect shelby tube samples, take rock cores, and push CPT cone…all on a 19,500 GVWR truck that does not require a CDL (Class A/B) to operate.
As an industry leader in innovation, Geoprobe® machines and tooling help the technical driller excel in an ever-changing environment. Geoprobe® geotechnical drilling rigs are designed to help make geotech projects fast and efficient, thereby saving time and money. Truck-mounted and track-mounted geotechnical rigs are available. The 3100GT and 150GT are 19,500 lb. GVWR truck mounted drill rigs that do not require a Class A or B CDL to operate.
What is Geotechnical Drilling?
Geoprobe® has a variety of rigs and tooling designed to meet drillers’ needs when it comes to geotech projects. Geotech exploration refers to geotechnical drilling to collect information used to engineer the foundations of structures, such as roadways, buildings, tunnels, and levees. The low impact and maneuverability of the rigs are perfect for investigative projects, too. The geotechnical rigs can move freely at project sites with limited access, such as next to foundations, inside buildings or under power lines.
Quality components like the automatic drop hammer, combo head, and split spoon sampling system, make the process for collecting geotechnical soil samples quick and efficient. Once collected, most geotech samples are transferred to a laboratory for testing to collect information about the soil structure.
3100GT Geotech Rig Features
Multiple rotary head options are available for the 3100GT Geotechnical Drilling Rig. These include the GA4000 (4000 ft-lb, 150 rpm), GA4100 (4000 ft-lb, 750 rpm), CB5 Combo Head (6000 ft-lb, 600 rpm). All heads provide full torque in forward and reverse.
Automatic Drop Hammer
The DH104 Automatic Drop Hammer is equipped for geotech Standard Penetration Testing (SPT) work. The easy-to-use drop hammer hydraulically sideshifts over the tool string. The DH104 Automatic Drop Hammer comes standard with a 140 lb. slug.
Head Side Shift
The head can be side-shifted a total of 26-in. This allows for side-shifting the head for rotary work, geotechnical work, and out of the way completely when using the winches. This makes working over the tool string quick and efficient.
Drill Mast Positioning
The drill mast includes 105-in. of head feed travel. With extend, swing, mast dump, oscillation, and fold, the operator can quickly deploy and position the drill mast exactly where the hole dictates. Drill mast outriggers let you quickly setup above a mud pan.
Telescoping Dual Winch Mast
The telescoping winch mast reduces overall height but still allows the tripping out of 20-ft. lengths of rod when combined with the 3-ft. extension. The telescoping option allows you to set the mast height based on geotech site and field conditions.
Cone Penetration Testing (CPT)
The 3100GT can be setup for CPT by using a few simple anchoring components: rod guide, anchor, and anchor bridge. Automatic head feed rate control advances the cone at a steady 2 centimeters per second specified by ASTM Standard D5778.