Akkerman Inc.

The Pipe Jacking Keyhole Jacking Frame includes horizontally mounted hydraulic cylinders with keyed notches that lock into place and ensure smooth and continuous TBM and pipe advancement. The frame’s hydraulic functions include extend, retract, high flow return, and auxiliary control.

The Pipe Jacking Keyhole Jacking Frame is positioned in front of a reaction wall on the design axis. A stationary set of cables is routed from the power pack to the jacking frame in the launch shaft. The Pipe Jacking Keyhole Jacking Frame exerts continuous and uniform hydraulic jacking force onto a thrust ring, which moves the TBM and pipe along the alignment path. The jacking frame force reacts against the concrete thrust block and the ground outside of the shaft.

Akkerman standard Pipe Jacking Keyhole Jacking Frame sizes selected by size to accommodate the TBM, pipe diameter, dirt bucket, and shaft lengths can be customized to suit project needs.

  • Pipe Jacking Keyhole Jacking Frame Family complement All Akkerman TBM models
  • Keyed notches on the cylinders lock into place to ensure smooth and continuous advancement
  • Exerts continuous and uniform hydraulic jacking force onto a thrust ring
  • Guidance system notch in the thrust plate to allow for pipe laser projection down the tunnel centerline
  • Some models are configurable for additional thrust cylinder capacity with the addition of a thrust cylinder kit


ModelThrustPipe OD MaxWeight
MT460K-PJ400 ton62 in35,000 lbs
MT860K-PJ800 ton62 in45,000 lbs
MT875K-PJ800 ton77 in56,000 lbs
MT890K-PJ800 ton93 in60,000 lbs
MT8102K-PJ1200 ton104 in74,000 lbs
MT8104K-PJ1200 ton106 in75,000 lbs
MT8114K-PJ1200 ton116 in85,000 lbs
  • Weights dependent on configuration of final unit.
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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.

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