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GBM Product Guide 308A/339A System

GBM Product Guide 308A/339A System
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GUIDED BORING - 308A/339A SYSTEM Akkerman's Guided Boring Machine (GBM) method, often referred to as pilot tube microtunneling, offers customers extended and accurate drive lengths in various ground conditions. The GBM provides the spoil removal process of the auger boring machine and the same level of accuracy as traditional microtunneling—all in one compact, multifaceted The 308A/339A Jacking Frames allows operators to install pipe from an 8 or 9-foot (2.4/2.7 m) shaft. Our distinctive dual-walled pilot tube allows liquid lubrication throughout installation, thus minimizing jacking force and rotational torque. A guidance system consisting of a theodolite and digital camera, mounted behind the jacking frame, allow operators to view the illuminated LED target on a computer- controlled digital monitor in the launch pit, ensuring that line and grade tolerances are met. The 308A/339A systems are hydraulically powered with a P100Q or P150Q Power Pack and controlled with an in-shaft pendant. The guided boring method is typically a multi-step process. First, pilot tubes, with a soil appropriate steering head mounted on the front, establish line and grade. For non-displaceable spoil, the Eliminator acts as the lead tool in the progression. Next, the bore diameter is increased as the casings and augers excavate the soils. In the last step, the final product pipe is installed directly behind the casings and augers. As pilot tubes, casings and augers, then final product pipe is installed and advanced, a section is removed from the reception shaft. This process continues until the final product pipe is in place. If a Powered Cutter Head (PCH) or Powered Reaming Head (PRH) is used, it is placed behind the casings and augers and before the final product pipe.The auger spoil flow is reversed toward the reception shaft for removal. The PRH or PCH's rotating cutter bits excavate the soil to the pipe diameter while minimizing jacking force and accelerating the speed of the drive. Note: Akkerman standard sizes can be customized to suit project needs. *Bolt-on increase kits are available to meet specific pipe diameters. diesel engine and a tandem-pump to deliver maximum flow for both jacking and rotational The PRH system allows customers to bore multiple pipe diameters while utilizing 11 -inch allow customers to bore pipe diameters larger than the PRH's capacity in challenging ground conditions with 11-inch (279 mm) casings and The 30-inch (762 mm) pilot tubes feature a unique dual-walled design that allows for fluid passage. The compact Jetting and Lubrication pump allows customers to maintain optimum production rates in variable soil conditions. The Eliminator, eliminates the need for pilot tubes in the GBM process and performs as the lead tool

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GBM Product Guide 308A/339A System 1Pages

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GBM Product Guide 308A/339A System
1Pages