E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D17/00—Caps for supporting mine roofs
E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
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
Landscapes
Engineering & Computer Science
(AREA)
Mining & Mineral Resources
(AREA)
Life Sciences & Earth Sciences
(AREA)
General Life Sciences & Earth Sciences
(AREA)
Geochemistry & Mineralogy
(AREA)
Geology
(AREA)
Architecture
(AREA)
Civil Engineering
(AREA)
Structural Engineering
(AREA)
Shielding Devices Or Components To Electric Or Magnetic Fields
(AREA)
Poutres et poteaux, simples et doubles, constitués par la réunion de profilés à section droite en Z, et permettant notamment la réalisation d'un portique ou d'une potence destinée à une construction de bâtiment