Process and arrangement for the support of underground cavity sy

Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention

Patent

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Details

405146, 405150, E21D 1100

Patent

active

045056226

ABSTRACT:
This invention relates to a method for bracing an underground cavity, wherein the cavity is lined with a tensionable layer, an expansible arch is then inserted against said layer, the arch is then tensioned and clamped in position to exert pressure in accordance with a specified formula.

REFERENCES:
patent: 2148783 (1939-02-01), Spaulding
patent: 3304954 (1967-02-01), Kaiser
patent: 3381479 (1968-05-01), Curzio
patent: 4010616 (1977-03-01), Lovat

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