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
Lithos Engineering is focused on providing tunnel design and construction management for underground construction projects across the United States and has worked with many different tunnel contractors on projects of varying sizes and complexity. I am always happy
to see Akkerman equipment on our project sites and I know we can rely on Akkerman products for a high level of performance and reliability.
I had the pleasure of working with Akkerman on one of our projects for which they designed and constructed a project specific hard rock TBM for a curved water conveyance tunnel high in the Rocky Mountains of Colorado. Akkerman not only provided great solutions and technical support for the project but was a pleasure to work with in a collaborative teaming environment that allowed us to not only reduce project risks but reduce construction costs and schedule. During that project, I visited the Akkerman production facility to inspect the TBM under construction; I was extremely impressed with the Akkerman management, staff, and systems for quality control. I look forward to a long future of working with Akkerman and their products on our tunneling projects.