FIELD: civil engineering. SUBSTANCE: group of frameworks comprising semi-tunnels is installed to working position, then detent is concreted beginning from front pair of semi- tunnels. Front pair of semi-tunnels is released on solidifying the concrete. Each semi-tunnel is turned around in horizontal plane, then they are successively moved between adjoining pairs of semi-tunnels placed in working positions and is placed in its working position immediately adjacent to the last pair of semi-tunnels. The semi-tunnels include horizontal deck 2 and vertical deck 3 interconnected on the top. Horizontal deck is maintained by upright 10 and struts 11 placed in such a manner that dismantled tunnel would be placed in its working position between two semi- tunnels. EFFECT: high quality of concrete. 2 cl, 4 dwg
