Shield tunneling method and shield machine therefor

Details Shield tunneling method and shield machine therefor Shield tunneling method and shield machine therefor

1990-02-28

1991-02-05

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

405147, E21D 1108, E21D 1110

Patent

active

049900277

ABSTRACT:
A small diameter shield tunnel is constructed by using a shield machine and assembling within a tail portion of the machine a set of three 120.degree. arcuate segments into a segment ring. An annular seal device is axially movably provided between the outer periphery of the segment ring and the inner periphery of a tail skin plate defining the tail portion of the machine. A back-filling material is charged into an annular gap formed between the outer peripheral surface of the segment ring and natural soil surrounding the segment ring. The back-filling material within the annular gap is compressed by the seal device which is caused to move between the inner peripheral surface of the tail skin plate and the outer peripheral surface of the segment ring, in the axial direction of the tunnel, away from a face where excavation of natural soil is carried out mechanically.

REFERENCES:
patent: 3550382 (1970-12-01), Khodosh et al.
patent: 3561223 (1971-02-01), Tabor
patent: 4072021 (1978-02-01), Yamazaki
patent: 4118938 (1978-10-01), Unger et al.

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