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
E21D11/20—Special cross- sections, e.g. corrugated
Landscapes
Engineering & Computer Science
(AREA)
Mining & Mineral Resources
(AREA)
Architecture
(AREA)
Civil Engineering
(AREA)
Structural Engineering
(AREA)
Life Sciences & Earth Sciences
(AREA)
General Life Sciences & Earth Sciences
(AREA)
Geochemistry & Mineralogy
(AREA)
Geology
(AREA)
Reduction Rolling/Reduction Stand/Operation Of Reduction Machine
(AREA)
Structure porteuse en beton arme, procede pour sa realisation ainsi qu'element prefabrique en beton arme, bati de coffrage et procede pour la fabrication d'elements prefabriques en beton arme et elements prefabriques en forme de caissons comportant des plaques jumelees