Method for constructing a rectangularly shaped tunnel

Details Method for constructing a rectangularly shaped tunnel Method for constructing a rectangularly shaped tunnel

1978-02-01

1979-04-03

Shapiro, Jacob

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Sectional

405139, E21D 1110

Patent

active

041474520

ABSTRACT:
A rectangularly shaped tunnel is constructed to include an artificial roof, side wall pillars, a center wall pillar and floor portions all extending along the length of tunnel. The artificial roof is formed by sequentially excavating cross cut shafts and by subsequently plugging the thus formed cavities with concrete. Then the portions directly beneath opposite sides and the center of the roof are excavated and filled with concrete to form side wall pillars and a center wall pillar. Thereafter the rock portions covered by the roof and the wall pillars are excavated to form inner hollow tunnel chambers, the bottoms of which are covered by concrete to form floor portions. Iron frames are embedded in the concrete.

REFERENCES:
patent: 960940 (1910-06-01), Jackson
patent: 1242217 (1917-10-01), McAlpine
patent: 1338030 (1920-04-01), Meem
patent: 1785096 (1930-12-01), Proctor
patent: 4009579 (1977-03-01), Patzner

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