Equipment

Akkerman Inc.

Excavator Boring Shields (EBS) and the EX‐50 Excavator are designed for manned‐entry, open‐face mechanical excavation of large diameter pipe jacking, liner plate, and ring‐beam and lagging tunnel building applications.

The slant faced Excavator Boring Shield and pipe are hydraulically advanced with the Keyhole Jacking/Thrust Frame or with the Tunnel Boring System and 5200 Pump Unit thrust cylinder.

The operator controls the EX‐50 Excavator’s claw with a joy stock and foot controls to excavate spoil for removal onto the belt conveyor to the Haul Unit (Muck Cart) for disposal.

The EX‐50 Excavator’s rotating boom has a full range of motion, including extension beyond the bore’s face to remove obstructions, as necessary.

Tunnel line and grade are controlled with the use of a standard passive pipe laser. The operator assesses the location of a fixed laser point on the EBS cutter head and makes adjustments as necessary.

Sand shelves come standard with every EBSs purchased. They can also be equipped with closeable hydraulic doors to prevent subsidence into the tunnel interior.

Features:
  • Simple, cost‐effective solutions for large diameter pipe jacking with the ability to remove obstructions at the face
  • Perform best in sand, medium to stiff clay, dry or dewatered soil, and weathered rock without groundwater
  • EX‐50 Excavator interchangeable between EBS models

EBS 840
EBS 960
EBS 1080
EBS 1200
EBS 1440

Specifications
ModelShield ODOn-Board Power PackExcavator Controls
EBS 840100-102 in.OptionalEX-50
EBS 960114 in.OptionalEX-50
EBS 1080128 in.StandardEX-50X
EBS 1200144 in.StandardEX-50X
EBS 1440168 in.StandardEX-50X

Increase kits are available. Hydraulic Closeable Doors Optional on all diameters.

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Akkerman gives us the small company feel by paying attention to details and being there to solve problems, but at the same time backs us like a large company with quick response and resources to complete the job. That is why we use Akkerman, not only for their industry leading equipment, but their industry leading support.

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Tunneling