AZ100 Total Guidance System
Developed by Akkerman to support long-distance and curved pipe jacking, the AZ100 TGS is a self-surveying azimuth-based total guidance system. The AZ100 TGS minimizes errors often encountered with other types of guidance systems due to laser deflection or MTBM drift. Using fixed reference prisms or “azimuths” strategically located on the launch shaft, a “shaft station” communicates with self-leveling total stations via prisms inside the tunnel. Positioned at a fixed distance from the MTBM to eliminate refraction from atmospherics, an MTBM “pipe station” projects a laser onto the MTBM target allowing the operator navigation control. During this operation, the series of total stations communicate at regular intervals while referencing their position to the azimuths each time. This ensures line and grade accuracy at extremely long distances or complex alignments.
FEATURES:
- An initial survey of tunnel start and endpoints is the only survey required, reducing downtime.
- Total stations can be spaced 1,000–3,500 ft apart depending on prism size, tunnel diameter, and atmospheric conditions.
- The AZ100 TGS logs over 100 data points for reporting alignment deviation, face pressure, and torque changes.
- Guidance system automatically self‑surveys during pipe installation; operator can request a survey check with one button.
- AZ100 TGS software is supported on Akkerman microtunneling control systems.
- Requires DTA programming, provided by Akkerman.
Testimonials
Our interaction with Akkerman began on a project where we were struggling with their competition’s machine. Changing machines during a project to their machine required a leap of faith on our part. That project completed 20 years ago turned out to be successful microtunneling projects throughout North America. Their leadership in providing technically superior American made equipment is second to none in the world today.