FIELD: construction of underground structures in rocks. SUBSTANCE: lining of underground structure of reinforcing metal blocks, containing internal metal insulation with stiffening ribs and concrete, has blocks made of a plate rolled in radius with stiffening ribs projecting from its ends, and bearing members in the form of transverse strips located along the block and evenly spaced and connected to stiffening ribs by vertical plates. EFFECT: enhanced reliability of protection against hydrostatic pressure. 2 cl, 2 dwg
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