METHOD OF CONSTRUCTION OF DEEP-SEATED SUBWAY STATION Russian patent published in 1997 - IPC

FIELD: underground construction. SUBSTANCE: method includes preliminary driving of adits with installation of supports for vaults of middle tunnel, driving of side and middle tunnels, first, from crowns to cut of installed supports, mounting of lining of tunnels with lining of middle tunnel resting on supports, and lining of side tunnels resting on supports and ground, and then, subsequent extraction of ground down to support foot with erection of through part of station. Distinguishing feature consists in that supports in addits are made in form of columns with main beams and supporting members, and they are installed in vertical with their fastening by reusable braces with subsequent driving, first, middle tunnel, and then side tunnels and mounting of lining from blocks having internal cavities, injection of cement mortar beyond their external surface, concreting block internal cavities by parts equalling column spacing, and trough part of middle tunnel is made in form of cast-in-situ plate to form rigid structure together with vaults and columns with main beams. After mounting of lining of side tunnels, their trough pats are erected in form of reverse vaults. EFFECT: higher efficiency. 2 dwg