LINING OF UNDERGROUND STRUCTURE FROM REINFORCED METAL BLOCKS Russian patent published in 2010 - IPC E02D29/45 

FIELD: construction.

SUBSTANCE: lining of underground structure from reinforced metal blocks comprises internal metal insulation with stiffening ribs and concrete. Reinforced metal blocks are made in the form of rectangular parallelepipeds, which consists of metal sheet, working armature rods welded to it with length by 20 mm less than length of metal sheet and stiffening ribs in the form of two or more diagonal metal trusses, upper belt tops of which are located in the same plane, and armature lattice made of longitudinal armature rods, with number equal to doubled number of trusses and cross armature rods with pitch equal to pitch of truss diagonal, at the same time tops of upper belts of trusses serve as support elements for fixation of armature lattice on them, and arranged so that metal sheet, welded working armature rods, diagonal trusses and longitudinal rod armature of lattice fixed on tops of truss upper belts, create lower and upper diaphragms of vertical rigidity of reinforced metal block, transverse armature of grid creates upper diaphragm of horizontal rigidity, and metal sheet - its lower diaphragm. Length of longitudinal rods of lattice exceeds length of metal sheet on each side by value 1, and created extensions of longitudinal rods are bent according to radius, equal to distance between metal sheet and armature lattice h, and from one side at least half inserted into tubular cartridges with length of 10-20 diametres of armature rods, which are bent in the form of knee along the same radius as longitudinal armature rods, having holes in middle part of length for filling of fast-hardening cement-sand solution and equipped with fastening bolts. Cross rods of armature lattice, length of which on each side is equal to width of metal sheet, on one side at least half inserted into tubular straight cartridges, equipped with fastening bolts and holes in a manner similar to bent cartridges. Exceeding of length of longitudinal rods of lattice over length of metal sheet 1 is identified using given dependence.

EFFECT: improvement and unification of reinforced metal block for expansion of application field and simplification of structure lining assembly technology.