GBM

Guided Boring Machines (GBM)
Akkerman’s Guided Boring Machine (GBM) method, also known 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 system. The pipe installation involves a three-step process where launch and reception shafts are strategically located to minimize surface disruption. Three robust jacking frame configurations are available to meet contractor’s needs. Akkerman GBMs are used in conjunction with a theodolite guidance system to provide accurate pipe installation. Akkerman manufactures GBMs for installation of pipe in the 4" - 48" (102 - 1,219 mm) OD range in displaceable soil under 50 blow count.
GBM Technical Manual (14.2 MB)

240A Jacking Frame
The 240A is a single stage long frame with a 48” (1,219 mm) stroke cylinder for smooth continuous advancement.When used as a stand alone unit, the 240A jacking frame gives operators the ability to install up to 24-inch (610 mm) OD, one-meter pipe from a 10-foot (3 m) shaft. It can be used as a stand alone unit or in conjunction with an auger boring rig.

GBM Product Guide 240A System | 240A Jacking Frame Spec Sheet

308A/339A Jacking Frame
The 308A/339A latching frames allows operators to install up to 30-inch OD (762 mm) pipe from an 8 or 9-foot (2.4/2.7 m) minimal diameter shaft.

GBM Product Guide 308A/339A System | 308A Jacking Frame Spec Sheet

P100Q, P150Q and P275T Power Packs
Akkerman offers the P100Q, P150Q and P275T power packs. They provide hydraulic power to operate the jacking frames and include the steering head and guidance kits and breakout tooling. Features a remote pendants for in-shaft operator control.

P100Q Power Pack Spec Sheet | P150Q Power Pack Spec Sheet | P275T Power Pack Spec Sheet

The Jetting and Lubrication Pump arrangement allows customers to maintain optimum production rates in variable soil conditions in one compact, easily-transported unit. It features independent hydrostatic flow controls for premium user control in a variety of soil conditions. The tanks can be easily serviced at the open/close valve on the tank outlet. An in-tank agitator mixes the lubrication quickly and keeps it consistent throughout the production process.

Jetting and Lubrication Pump Spec Sheet

Powered Reaming Heads (PRH)
PRHs were designed wih versatility in mind. They allow the customer to intall multiple sizes of pipe with one set of casings and augers.
PRH Spec Sheet

Powered Cutter Heads (PCH)
PCHs for the GBM systems are unique to Akkerman and are available in sizes 20-44 inch (508-1,118 mm) OD. They offer the customer more power to the cutter face and increase the bore size by reversing the augers and casing and pushing the spoils to the reception shaft. The PRH features independent drives for rotation and spoil removal.
PCH 20-28.5" Spec Sheet | PCH 36-44" Spec Sheet

Cutter Head with Integral Swivel
When using this unique upsizing tool, contractors have an option above and beyond the reaming head for difficult ground conditions. While versatile in many applications, contractors using the Cutter Head with Integral Swivel with an auger bore rig will especially realize its benefits.

Cutter Head with Integral Swivel Spec Sheet

Akkerman offers a complete line of accessory equipment and for our products to allow our customers to be able to bid on a wide range of jobs and get the most out of their Akkerman equipment investment. Additionally, we maintain a large spare parts inventory to provide the fastest possible delivery of desired items.