Tunnel Boring Machine Erectors

Galbiati Group has recently built two 4.5 ton- segment erectors for TBM (Tunnel Boring Machine), rotating head, for the excavation of the Qingdao 5-6 metro.

The segments erectors are 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 erectors are 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°

The erectors have also included a coupling plate equipped with bolt benching machine.

Below photos of the erectors completely assembled at Galbiati workshops.

Erectors technical data:

• Total beams length = 7,000 mm
• Overall rotation = ± 220°
• Translation mouvement speed = N/A
• Rotational speed = max. 2 rpm
• Maximum load = 4,500 Kg
• Weight = ~ 25 ton
• Intrados diameter = 5,400 mm