SU1661334A1 - Method of constructing ribbed ferroconcrete vaults - Google Patents

Abstract

The invention relates to the field of construction and is intended for the construction of ribbed reinforced concrete vaults using a pneumatic formwork. The goal is to increase the spatial rigidity and durability of the arch, improving the reliability of the edges of the edges. The method consists in the fact that during the concreting of the slab on the non-external pneumatic demoulding, the strips 7 are left unbonded in the places where the ribs are located. After lifting the pneumatic formwork with the concrete mixture laid in the design position, prefabricated reinforced concrete elements of 9 ribs are mounted. During installation, the elements 9 are lowered onto the strips 7 until the folded ends 11 of the reinforcement outlets 10 are aligned with the reinforcing mesh 4 and are engaged with each other. The solution is injected into the cavity 13 between the rib, the plate and the pneumatic formwork. 2 hp ff, 7 ill.

Description

SchigM

The invention relates to construction and is intended for the construction of ribbed reinforced concrete vaults using a pneumatic formwork.

The purpose of the invention is to increase the spatial rigidity and durability of the arch, as well as improving the reliability of the edges of the edges.

FIG. t shows a pneumatic formwork and a reinforced betrinnny plate before lifting to the design position, cross section; in fig. 2 - the same, after lifting to the design position; in fig. 3 is a schematic of the assembly of prefab rib elements in fig. 4 is a diagram of the injection of a solution into the cavity under the edge of the arch; in fig. 5 shows section A-A in FIG. four; in fig. 6 is a section BB in FIG. five; Fig. 7 is the same (the process of feeding the solution is carried out through special through holes in the prefabricated elements).

The method of erection of ribbed reinforced concrete vaults is carried out as follows.

A reinforced mesh 4 is laid on an uninflated pneumatic wall 1, spread out on a flat base 2 and secured to foundations 3, and concrete 5L slab is cast, which is supplied with mortgage parts 6. When concrete is cast, 5. the plates 7 are placed in non-concreted areas Then, before the concrete hardens, the pneumatic formwork 1 is inflated, the slab 5 is bent to the design position, and the concrete is held to the required strength. On the hardened slab 5, precast reinforced concrete elements 9 of the ribs 8 are mounted. The elements 9 have reinforcement outlets 10 with the ends 11 bent at a right angle and directed along the roof of the roof (Fig. 4). Assembling the assembly of reinforced concrete elements 9 begin from foundations 3 towards the ridge of the arch.

During installation, prefabricated reinforced concrete elements 9 are lowered onto non-concreted strips 7 until the curved ends 11 coincide with the reinforcing mesh 4, after which each precast concrete element 9 is shifted down to the end of contact with the downstream element 9. At the same time, the curved ends 11 of the outlet 10

meshes with reinforcing mesh 4.

Then weld the embedded parts

12 precast concrete elements 9,

pump the solution into the cavity 13 between the edge 8, the plate 5 and the pneumatic formwork 1.

The injection of the solution into the cavity 13 can be carried out through the gaps 14 in the joints between the precast concrete elements 9 of the fins 8. The injection of the solution is carried out starting from the bottom prefabricated elements.

The injection of the solution into the cavity 13 can also be performed through pre-made through holes 15 in precast concrete elements 9 ribs 8.

After the concrete has hardened to the set value, the pneumatic form 1 is dismantled.

Claims (3)

1. The method of erection of ribbed reinforced concrete arches, including the layout of pneumatic formwork on the base, reinforcement with reinforcing meshes, concreting of the endless slab and bending it into the design position when the formwork is inflated, the installation of precast reinforced concrete elements of the ribs and their rigid fixation to the mortgage parts on the outer surface of the slab, characterized in that increase the spatial rigidity and durability of the roof, as well as improve the reliability of the edges of the ribs, concreting the slab is carried out with strips with gaps between them in the locations of the ribs, and during installation, reinforced concrete rib elements are additionally fixed to the reinforcement grid of the plate by means of reinforcement elements bent at a right angle of reinforcement elements of the ribs, and then the solution is injected into the cavity formed by the concreted strips of the slab, the elements of the ribs and the pneumatic formwork. 2. A method according to claim 1, characterized in that the injection into the cavity is performed through the gaps in the joints between adjacent prefab edges, starting at the bottom. 3. A method according to claim 1, characterized in that the injection of the solution into the cavity is carried out through openings made in prefabricated reinforced concrete elements of the ribs. / 45 / / SS / Ys. / U / / UH // U XX / ft T7 / WSS / A T 3 zAt./ Y, 7 // A eight 14 15 2 12 Rig.Z ± A-CG tf 9  j & emi & f & f & x M № fi rfi Mitf3B3aB fj / (Reg. 5 5-5 FIG. 7