Method of producing a concrete lined tunnel or other underground

Details Method of producing a concrete lined tunnel or other underground Method of producing a concrete lined tunnel or other underground

1977-10-28

1978-12-19

Shapiro, Jacob

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Lining

E21D 1115

Patent

active

041299914

ABSTRACT:
A method of producing a concrete lined tunnel, or other concrete lined underground excavation, in which first a rough tunnel is excavated of a cross-section which is greater than that of the tunnel to be lined with concrete, whereafter a lost form is connected by support members to the inner surface of the rough tunnel spaced at a distance therefrom which corresponds to the expected maximum settlement of the inner surface under the influence of the rock pressure acting thereon, and finally applying a concrete lining to the inner surface of the lost form, while the rigidity of the support members relative to the rock pressure is made smaller than that of the concrete lining so that the support members may yield during the settlement of the rough tunnel.

REFERENCES:
patent: 1853224 (1932-04-01), Proctor

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