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We have recently realized one 4.5 ton- segment erector for a TBM (Tunnel Boring Machine), rotating head,for an important excavation project of the Mumbai metro line 3, India.
The segment erector is made up of a fixed structure and a moving one, both made of electro-welded structural metalwork and machined on machine tools. The fixed part consists of two longitudinal beams on which the sliding guides of wear-resistant material are mounted. The moving part consists of the translating/rotating ring and the pick-up system.
The erector is equipped with a mechanical pick up unit in order to grasp segments. The mechanical pick up unit grasps and retains segments for the entire duration of the positioning operations with three independent movements:
- Swinging = ± 5°
- Pitch = ± 5°
- Roll = ± 5°
Erector technical data:
- Total beams length = 5,900 mm
- Overall rotation = ± 220°
- Translation movement speed = N/A
- Rotational speed = max. 2 rpm
- Maximum load = 4,500 Kg
- Weight = 27,000 kg
- Intrados diameter = 5,400 mm
