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Priority to FR7430167ApriorityCriticalpatent/FR2284023A2/fr
Publication of FR2284023A2publicationCriticalpatent/FR2284023A2/fr
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
E21D11/14—Lining predominantly with metal
E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
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FR7430167A1974-09-051974-09-05Clame d'etrier d'assemblage d'elements de cadre de soutenement
WithdrawnFR2284023A2
(fr)