SU149200A1 - The method of installation of precast reinforced concrete shells double curvature - Google Patents

Description

Methods of mounting precast reinforced concrete shells of the double curvature of coatings of buildings and structures of trapezoidal ribbed slabs are known. However, such methods are complex.

When using the described method, prefabricated flat plates are used to simplify the fabrication of the elements and install them without scaffolding, which are joined in plan along continuous annular and meridional sections using mounting racks with suspensions mounted fixedly on the support ring of the coating and monolithic to form self-supporting annular sa dome.

FIG. 1 shows a schematic of the mounted shell; in fig. 2 - trapezoidal ribbed plate.

The method of mounting precast reinforced concrete shells of double curvature consists in mounting racks 2 fixed by braces 3 to the support ring / fixed by the braces 3. The plate 4 is lifted by the loops 5 with the help of a tilt b-shaped crane corresponding to its design position. At the same time, one end is supported on the ring 1, and the other on the set screws 7 of the truss-blade 8, which rotates relative to the crane 6. The truss-plate 8 rests on the ring 9, mounted on the crane 6, and on the ring rail 10. After detaching from the plates 4, the sling 11, attach the suspensions jf2 to its loops 5 and with the help of the tension sleeves 13 fix the plate 4 in the design position. Then the template farm 8, freed from the installed plate 4, is moved to the next plate 4, which is assembled in the same manner as the first one. With the support ring 1 and between each other, the plates 4 are joined by welding, forming a self-supporting annular c / 4, the meridional seams 15 of which are filled with concrete. After the concrete has hardened, c 14 gains sufficient rigidity and

No. 149200-2 strength for absorbing its own weight and mounting loads. After the second stage is installed, 16 is embedded in concrete with an annular joint 17 between it and som 14. When reinforcing seams / 5 and / 7, if necessary, reinforcing cages are installed before laying the concrete. The entire subsequent installation of the shell (dome) 18 will be introduced as described above, with the lower edges of the mounted plates 4 resting on the lining welded to the embedded parts of the plates of the previous strip, and the suspensions -12 are rearranged from the lower parts to the upper ones. When building coatings over buildings and structures of large spans, the shell includes intermediate reinforced concrete rings of increased rigidity used to install mounting racks removed from the support ring.

The described installation method makes it possible to reduce the time required for erecting buildings and structures, for example, circuses, covered markets for reservoirs, settlers, etc., to reduce their cost, to save a large amount of wood, which is usually used for scaffolding and scaffolding, and to reuse mounting tools.

Subject invention

The method of installation of precast reinforced concrete shells of double curvature of the coatings of buildings and structures of trapezoidal ribbed plates, characterized in that, in order to simplify the manufacture of elements and the possibility of installing them without scaffolding, prefabricated flat plates are used that join in the gglan along circular annular and meridional sections m using mounting racks with suspension mounted fixedly on the support ring of the coating, and monolithic, forming a self-supporting ring on the dome of the dome.

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