Shield tunnel boring machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...

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Details

299 801, E21C 2724, E21D 908

Patent

active

056976763

ABSTRACT:
A shield tunnel boring machine having a parallel link excavator includes excess excavating cutters joined to the excavator and divided into a plurality of steps. The excess excavating cutters of the respective steps are coupled to separate corresponding jacks that are actuatable and controlled independently of each other for allowing the position of the machine to be effectively controlled to be able to quickly correct any undesired change in direction of the tunnel boring operation.

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patent: 4406498 (1983-09-01), Akesaka
patent: 4607889 (1986-08-01), Hagimoto et al.
patent: 4998776 (1991-03-01), Chida et al.

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