RU65917U1 - REINFORCED CONCRETE MULTI-EMPTY PLATE OF THE STAND FORMING-FREE FORMING - Google Patents

Abstract

The utility model relates to construction. Reinforced concrete multi-hollow slab bench formwork molding is equipped with at least two sling nodes. Each sling unit contains a mounting loop and at least one anchor, which are installed in the body of the plate along mutually intersecting planes. The mounting loop and part of the anchor are monolithic in the slab with secondary filling concrete, and the rest of the anchor is placed in the slab body formed by the primary filling concrete. 3 s.p. f-ly., 3 ill.

Description

The utility model relates to the construction, in particular, to the designs of reinforced concrete hollow-core slabs obtained by formless molding on long stands.

Reinforced concrete multi-hollow shuttering molding slabs are known which contain mounting (sling) loops (see, for example, series 1.141 “Multi-hollow reinforced concrete floor slabs.” Issue 63 “Prestressed panels with round voids 6280, 5980, 5680, 5380, 5080 and 4780 in length mm, widths 1790, 1490, 1190 and 990 mm, reinforced with bars of thermally hardened steel of At-V class. Tension method - electrothermal. Working drawings ", p.32, drawing 1.141-1.63 100 SB).

The design of the mounting (sling) loops used in multi-hollow concrete slabs for shuttering molding are given, for example, in the “Manual on the design of concrete and reinforced concrete structures of heavy and light concrete without prestressing reinforcement (to SNiP 2.03.01-84)” M. Central Institute for Typical Design, 1989, p. 172, dev. 125.

For the prototype, a reinforced concrete multi-hollow slab of bench formless molding was selected (see, for example. Typical designs, products and units of buildings and structures. Code 0-312 "Plates are ordinary reinforced concrete multi-hollow prestressed bench formless moldings with a height of 220 mm for floors and coatings of multi-storey residential, public and industrial buildings - Issue 9. Reinforced slabs 7180, 8650 and 8980 mm long

K-7 ropes. Working drawings". M. Publishing house of the Central Institute for Typical Design. 1988, doc. 0-312.9-SB).

Reinforced concrete multi-hollow slabs of bench formwork molding are significantly less labor intensive to manufacture than similar formwork slabs. Nevertheless, they have a significant drawback - the lack of mounting (sling) loops, which complicates the loading and unloading, installation work and worsens safety precautions.

The absence of mounting (sling) hinges is due to the manufacturing technology of these plates.

When formworking slabs, hinges are first installed in the formwork, and then concrete is fed into it.

When bench-type formwork molding of slabs is not possible to install hinges on a stand before concrete is fed, as a self-propelled combine-walker moving along the stand not only delivers concrete, but also forms voids and the top surface of the slab. Installation of mounting (sling) hinges of known structures and known methods in the plate after its formation is also not possible due to the fact that they do not provide reliable adhesion to concrete.

The technical task of the utility model was to develop the design of a reinforced concrete multi-hollow slab of bench formless molding with mounting (sling) loops.

The essence of the utility model lies in the fact that the reinforced concrete multi-hollow slab of bench-type formwork, including a body with voids and reinforcement, is equipped with at least two sling units, each of which contains a mounting loop and at least one anchor, which are installed in the body of the plate along intersecting planes, mounting loop and part of the anchor

monolithic in the slab with secondary filling concrete, and the rest of the anchor is placed in the body of the slab formed by the primary filling concrete.

The proposed reinforced concrete multi-hollow slab formwork bench molding has reliable sling units that facilitate loading and unloading and installation work, and also helps to improve safety.

The utility model is illustrated by drawings, where Figures 1 and 2 show a side view of a reinforced concrete multi-hollow slab of bench formwork molding with a partial section; figure 3 is an embodiment of a closed mounting loop.

Reinforced concrete multi-hollow plate of bench formwork molding includes a body 1 with voids 2, reinforcement (not shown in the drawing) and at least two sling units. Each sling unit contains a mounting loop 3 and at least one anchor 4, which are installed in the body of the plate along mutually intersecting planes. The number of anchors 4 depends on the design of the mounting loop 3 and the physical and mechanical characteristics of concrete. The most optimal is the closed design of the mounting loop 3, one of the variants of which is shown in figure 3 of the drawings of the description of the application. When applying this design of the mounting loop, only one anchor 4 can be used in the sling unit. However, other loop designs can also be used, including those described in the “Manual for the design of concrete and reinforced concrete structures of heavy and light concrete without prestressing reinforcement (to SNiP 2.03.01-84) "M. Central Institute for Typical Design, 1989, p.172, dev. 125.

The mounting loop 3 and part of the anchor 4 are monolithic in the slab with secondary filling concrete 5. The rest of the anchor 4 is placed in the body 1 of the plate formed by the primary filling concrete 6 from which it was molded. Thus, the anchor 4 binds the concrete of the primary filling 6 and the concrete of the secondary filling 5 and thereby increases the adhesion between them, which, in turn, increases the reliability of the sling unit and eliminates the tearing of the mounting loops 3 from the slab during loading and unloading and installation works. The most optimal is the placement of the mounting loops 3 in the voids 2 of the body 1 of the plate, as shown in Fig.1, 2 of the drawings of the description of the application. However, in small plates, the length of which does not exceed 3-4 meters, it is allowed to place mounting loops 3 between the voids 2.

The most optimal placement of the anchor 4 is shown in figure 1 of the drawings of the description of the application. In this case, the Central part of the anchor 4 is monolithic together with the mounting loop 3 with concrete of the secondary filling 5. Nevertheless, in plates, the length of which does not exceed 3-4 meters, only the end part of the anchor 4 can be monolithic, as shown in figure 2 of the description drawings applications.

Reinforced concrete hollow core plate bench formwork molding is made as follows. First, a slab of concrete of primary filling 6 is formed by means of a concrete paver. At the locations of the mounting loops 3, primary concrete 6 is removed and loops 3 are installed, and then anchors 4, after which they are monolithic with secondary filling 5.

Claims (4)

1. Reinforced concrete multi-hollow slab formwork bench forming, including a body with voids and reinforcement, characterized in that it is equipped with at least two sling nodes, each of which contains a mounting loop and at least one anchor that are installed in the body slabs on intersecting planes, the mounting loop and part of the anchor are monolithic in the slab with secondary filling concrete, and the rest of the anchor is placed in the body of the slab formed by the primary filling concrete. 2. Reinforced concrete multi-hollow slab according to claim 1, characterized in that the mounting loop of each sling unit is closed. 3. Reinforced concrete multi-hollow slab according to claims 1 and 2, characterized in that the mounting loop of each sling unit is placed and monolithic in one of the voids of the slab body. 4. Reinforced concrete multi-hollow slab according to claims 1 and 2, characterized in that the mounting loop of each sling unit is placed and monolithic between the voids of the slab body.