Guided auger boring is one of the most popular trenchless methods for accurate installation of steel casings in North America. Akkerman offers several tools contractors can select to adapt their pilot tubes to steel casing based on the projects’ ground conditions.
GBM Bearing Swivel
Once the pilot tubes are installed on line and grade, the GBM bearing swivel assembly is installed between the last pilot tube and the cutterhead driven by the rotating auger string.
GRS Cutterhead
The pilot tube Guide Rod Swivel (GRS) cutterhead welds onto the lead casing and contains an internal swivel bearing located behind the cutting face. The bearing assembly is interchangeable between multiple casing diameters and keeps the casing on line and grade achieved from the installed pilot tubes. The needle connection between the GRS cutterhead and pilot tubes allows for fluid delivery from the reception shaft to assist difficult bores, while retractable cutters allow tripping of augers if an obstacle is encountered.
High Torque Casing Adapter (HTCA)
The HTCA attachment turns the already versatile 4800 series GBM system into an 88,000 ft-lbf monster machine able to perform all guided auger bore functions. The HTCA simply locks into place directly in front of a 4800A GBM and includes the master ring, dirt paddles, and discharge chute to install steel casing up to 36in. With an HTCA installed on a 4800A, contractors can perform guided auger boring in smaller shafts without dangerous exhaust gases.
Benefits & Features
- GBM Bearing Swivel connects to your existing auger boring cutterhead or lead auger.
- Bearing Swivel and GRS Cutterhead suitable for densely compacted ground and soft rock.
- Interchangeable GRS bearing assembly saves contractors money.
- GRS Cutterheads utilize 6×5 inch hex adapter for ultimate durability and mating versatility.
- GRS Cutterheads feature wing cutters suitable for auger removal.
- HTCA allows 4800A GBM owners to use one piece of equipment to install pilot tubes and auger bore steel casing with one set-up, while minimizing shaft size and reduce the disturbance of a diesel engine running below grade.
GBM Bearing Swivel Assembly
Guided Rod Swivel 50 – Models GRS-24, GRS-26, GRS-28, GRS-30, GRS-36
High Torque Casing Adapter (HTCA)
Augering Adapter Assembly
Specifications
Model | Rating | Diameter | Weight |
---|---|---|---|
Bearing Swivel | 50 ton | Up to 24 in | 100-lbs. |
Guide Rod Swivels
Model | Rating | Diameter | Weight |
---|---|---|---|
GRS-24 | 50 ton | 24 in | 1,200-lbs. |
GRS-26 | 50 ton | 26 in | 1,300-lbs. |
GRS-28 | 50 ton | 28 in | 1,400-lbs. |
GRS-30 | 50 ton | 30 in | 1,500-lbs. |
GRS-36 | 50 ton | 36 in | 1,800-lbs. |
High Torque Casing Adapter
Model | Torque (lo/hi) | Speed (hi / lo) | Weight |
---|---|---|---|
HTCA-4800 | 40,000 ft-lbf / 88,000 ft-lbf | 16 rpm / 10 rpm | 4,800-lbs. |
Testimonials
I have been working in the underground construction for the past 40 years. In the last 25 years I’ve been involved with all kinds of tunneling operations. Hand mine tunnels using jacking equipment, wood box tunnels dug by hand. But my favorite type of tunneling is MTBM’s. I have been working with and around Akkerman tunnel machines from 120” wheeled machines all the way down to the 48” SC tunnel machine. We’ve done successful runs in ranges from 200’ to 800’ with no problems. In all my years of tunneling we have never had a failure of equipment to cause us any down time. When we have had issues with mechanical parts or service needed Akkerman can usually get you the parts pretty quickly and technicians can get on a plane and help you out also. The team at Akkerman is always ready to answer any questions or problems you may have. They can help you decide on what equipment might work best for your particular job needs. I’ve also been involved with the GBM equipment we have run 32” PCH installing 30” Hobas pipe and also 44” PCH installing 42” Hobas pipe. We have had great success with GBM runs up to 500’ in length. Our last purchase was a new 5200 series jacking frame and 60” series 2 MTBM. We chose Akkerman for this equipment for our past experience and the fact they are made in the USA and can service us quickly. It truly has been great working with Akkerman.