Method and apparatus for supporting the wall of an upwardly exca

Details Method and apparatus for supporting the wall of an upwardly exca Method and apparatus for supporting the wall of an upwardly exca

1978-05-23

1980-06-10

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Vertical

175171, 299 12, 405150, E21D 300, E21D 1900

Patent

active

042070163

ABSTRACT:
There is provided a method and apparatus for supporting the wall of an upwardly excavated shaft. Cylindrical support frames which are successively thrust up through the shaft are respectively composed of several arcuate members and one or more disjointing members. A plurality of top supporting plates are provided on the top of the series of the cylindrical frames and are designed to fall inwardly toward the center of the shaft after the excavation of the shaft is terminated, thus constructing an umbrella like device for supporting the roof of the shaft.

REFERENCES:
patent: 752931 (1904-02-01), Smith
patent: 984337 (1911-02-01), Woodworth
patent: 2182477 (1939-12-01), Hollingsworth
patent: 3604754 (1971-09-01), Kampf-Emden et al.
patent: 3840272 (1974-10-01), Crane et al.

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