METHOD OF ERECTING UNDERGROUND STRUCTURE FROM CAST-IN-SITU PRESSED CONCRETE AND DEVICE FOR METHOD EMBODIMENT Russian patent published in 2001 - IPC

FIELD: underground erection, particularly, methods and devices for erection of underground structures from cast-in-situ pressed concrete; applicable in construction of tunnels of various applications and vertical shafts. SUBSTANCE: method includes excavation of ground, installation of forms, supply of concrete mix to space behind forms, reinforcing of concrete mix with the help of tensioned reinforcing wire ropes with subsequent displacement of forms relative to erected section of structure. Novelty consists in that after each cycle of forms displacement, reinforcing wire ropes are tensioned with simultaneous turning to opposite sides of noncemented ends of wire ropes. Device for the method embodiment has forms, reinforcing wire ropes secured at inlet of underground structure. Novelty consists in that forms consist of separate interconnected parts, main part is cylindrical, middle part is narrowing towards axis of underground structure, and tail part is also narrowing with transition to cylindrical shape. In this case, middle and tail parts are made for radial turning one relative to the other. Secured to main part are driving members with gear installed on shaft of each member. Said gear is kinematically engaged with gear-wheels fastened to end surfaces of middle and tail parts of forms. Drums provided with brakes and with wire ropes wound on them are installed on middle and tail parts. EFFECT: higher strength of erected structures from cast-in-situ pressed concrete in course of construction both horizontal and vertical workings. 2 cl, 3 dwg