FLEXIBLE AND WATER TIGHT COMPOSITE SHAFT LINING FORMED BY AN ASSEMBLY OF A CONCRETE CYLINDER FORMED BY A PLURALITY OF ANNULAR CONCRETE RINGS SEPARATED FROM EACH OTHER BY JOINDER GAPS, AND OF AT LEAST ONE SUPPORTING STEEL CYLINDER SECURED TO SAME

摘要

ABSTRACT OF THE DISCLOSUREA flexible and water-tight composite shaft of thetype comprised of a plurality of annular concrete sectionsstacked on top of each other with a soft. sealing intermediatelayer disposed between adjacent rings. At least one steelcylinder is provided exteriorly of the concrete cylinderIt is also composed of a plurality of cylindricor annular sections joined with each other by spring ringswhich are preferably arranged such that they bit into orengage edges of two adjacent concrete rings. The springrings are welded to the respective steel cylindric sectionsin water-tight fashion whereby the entire assembly isflexible and thus more capable of withstanding rock pressureparticularly in extreme depths of a mining shaft, whileremaining water-right.