Tubular element for tunnel construction

Details Tubular element for tunnel construction Tubular element for tunnel construction

1979-04-16

1981-12-15

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

405151, E21D 1104

Patent

active

043056830

ABSTRACT:
A hollow tube element of a predetermined maximal width and defining a predetermined axis adapted to be secured to an adjoining hollow element defines a prearranged axis for use as building blocks for the construction of a tunnel; either element is rotatable about its axis by an arbitrary angle relative to the other. The hollow tube element includes a plurality of interconnected slabs; the locus of intersection of an imaginary first plane tangential to a first exterior portion of the hollow tube element with an imaginary second plane, and tangential to a second exterior portion of said hollow tube element disposed opposite the first portion, both plates having the predetermined width, is an imaginary annular surface having a predetermined outer diameter when either element is rotated 360.degree. about its axis relative to the other. The outer diameter is finite when the planes are converging at a finite distance from the element, and otherwise infinite.

REFERENCES:
patent: 1363115 (1920-12-01), Helfrich
patent: 1923006 (1933-08-01), Proctor
patent: 2002127 (1935-05-01), O'Neal
patent: 3818710 (1974-06-01), Chlumecky
patent: 4047388 (1977-09-01), Howlett
patent: 4070866 (1978-01-01), Juvrud

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