Tunnel Boring Machine Segment Erector

We have recently realized one 4 ton- segment erector for a TBM (Tunnel Boring Machine) designed for an excavation project outside Mae Ngat, Thailandia.

The Tunnel Boring machine, for which the segment erector is intended, shall have a cutterhead of 4.9 min diameter and will be used to excavate an hydraulic tunnel on site.

The erector comprises a rotating structure controlled by two planetary gears with sprocket drives and a crown wheel. The structure is supported by six rollers and moves on chromium-plated tubular guides.

The erector is equipped with a mechanical pick-up unit in order to grasp segments.(pick-up two pins). The mechanical pick-up unit grasps and retains segments for the entire duration of the positioning operations with three independent movements:

• Swinging = 6°
• Pitch = 6°
• Roll = 6°

Erector technical data:

• Longitudinal stroke= 1,800 mm
• Overall rotation = ± 200°
• Rotational speed = 2 rpm/minute
• Maximum load = 4 ton
• Weight = 19,000 Kg
• Intrados diameter = 4,200 mm