CHUTE UNIT FOR METRO TUNNELS CAST IRON LINER Russian patent published in 2016 - IPC E21D5/10 E21D11/04 

FIELD: mining.

SUBSTANCE: invention relates to underground mine workings fixing, passable by caisson method, namely, to cast-iron tunnels lining chute units design. Chute unit for subway cast iron tunnels liner consists of reinforced concrete part and metal tray-plate, made in form of box-like rectangular shaped cast-iron casting with flat back of rectangular shape, changing into radial sides with formation of two internal caissons. On outer side casting is provided with stiffening ribs, forming external caissons. In internal caissons parallel and radial edges openings are made for fasteners and engraved grooves for sealing of joints. In one of plate external caissons opening is made for installation of transfer manipulator actuating element. In metal tray-plate profiled through chute is made embedded into one of its external caissons, which lengthwise axis is parallel to chute unit central axis. Along chute outline of the on side of parallel sides engraved grooves are made, matched with chute plate parallel sides engraved grooves for further sealing of said chute plates boards joints to each other. On chute external surface own stiffening ribs are made, forming external caissons and matched with reinforcement during chute unit concrete section grouting. Made so chute unit enables to obtain reliable routing of different communications along tunnel with provision of trouble-free operation.

EFFECT: technical result is aimed at ensuring of routing along chute blocks of air ducts, drain pipes, cables and other communications with provision of trouble-free operation and easy access to them.

4 cl, 8 dwg