RU2363818C1 - Unit of coupling of multi-cellular boards of kuchikhin - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention is related to the field of construction, in particular to unit of coupling of multi-cellular boards. Coupling unit comprises multi-cellular prestressed reinforced concrete boards. Boards are arranged with longitudinal-transverse reinforcement, with protrusions of armature rods in lower part of coupled boards and additional connection metal elements. Additional elements are installed in interboard seams. Interboard seams after boards installation on crossbar are embedded, creating disk of precast-monolithic floor. Lateral sides of boards are equipped with vertical keys. End sides of boards are inverted to each other by cavities and are equipped with two slots. Slots are arranged in the area of appropriate cavities. Bottom parts of slots are bottom part of cavities. In every board parallel to end surface, metal rod is installed. Additional connecting metal elements - tension bars - are introduced perpendicularly to metal rod. Tension bars are coupled with each other by means of bandaging, and with boards - by hook-like elements by means of engagement with metal rod. Facilities for seismic stability improvement are arranged in the form of transverse zigzag wire coupled with longitudinal armature rods with the possibility of stretching.

EFFECT: reliability, minimum consumption of materials and possibility to use coupling unit in construction in earthquake regions.

2 cl, 2 dwg

Description

The invention relates to the field of construction and can be used for the manufacture of prefabricated monolithic ceilings in the construction of residential, public and industrial buildings, as well as in frame and prefabricated monolithic buildings erected under normal construction conditions using vibrocompression methods.

The knots of the interface of prestressed reinforced concrete hollow core slabs, installed by the edges on the crossbars, contain reinforcement outlets in the interplate seams, which are subsequently monolithic, forming the overlap disk (1).

More perfect knots of pre-stressed reinforced concrete multi-hollow plates are known, obtained by vibrocompression and installed by the edges on the crossbars, in which the outlets of the reinforcement are placed in the inter-plate seams and are subsequently monolithic, forming the overlap disk (2). However, the known technical solution is not intended for use in construction in earthquake-prone areas.

It is known that for the use of building parts and elements in conditions of increased vibration, special means are used in the form of sliding reinforcement (3), supplemented by special means in the form of layers of rubber and bitumen on the side and lower surfaces of the plates. These additional measures complicate and increase the cost of construction.

The known device (2) is the closest analogue to the claimed invention.

The technical task of the present invention is the creation of such a node pair of prestressed multi-hollow reinforced concrete slabs for precast-monolithic floors, which will allow you to pair the slabs reliably with minimal material consumption and use the node in construction conditions in areas with high seismic activity.

This is achieved by placing the plates on the crossbar with the ends facing each other, the special design of the plates and the special design and placement of the reinforcement.

The essence of the claimed technical solution lies in the fact that in the interface of multi-hollow pre-stressed reinforced concrete slabs in earthquake-resistant precast-monolithic overlapping with longitudinally transverse reinforcement with reinforcing bar outlets in the lower part of the mating plates and additional connecting metal elements intended for placement in interplate joints, which after installing the plates on the crossbar, they are monolithic, forming a prefabricated monolithic overlapping disk, the sides of the prestressed multi-part It is proposed to equip total reinforced concrete slabs with vertical dowels, and end mates with a crossbar to arrange hollows facing each other, two grooves made in place of the corresponding voids in such a way that their bottom parts are the bottom of the voids. In each multi-hollow reinforced concrete slab, it is proposed to install a metal rod parallel to the end surface, and to introduce perpendicular to it additional connecting metal elements-strands, which are interfaced with each other by ligation, and with plates - hook-shaped elements by engagement with a metal rod. Means for increasing seismic resistance are made in the form of a transverse zigzag wire, conjugated with longitudinal reinforcing bars with the possibility of stretching. At the interface, the rods of longitudinal-transverse reinforcement can be made with a wire with a diameter of 5 mm, a zigzag wire selected with a diameter of 4 mm, a wire of a transverse bar that unites a portion of the reinforcing bars of each plate is selected with a diameter of 10 mm.

The following are drawings of the device in accordance with this technical solution.

Figure 1 presents a General view of the interface.

Figure 2 is a side view of monolithic site.

Multi-hollow reinforced concrete slab 1 obtained by continuous vibropressing. The plates 1 are based on a prefabricated crossbar 2 and face each other with ends 3, the crossbar 2 is simultaneously a formwork for a monolithic section 4 of a precast-monolithic overlap. Plates 1 have outlets of reinforcing rods 5. Plate 1 is equipped with additional connecting parts 6-strands that are interconnected by dressing (not shown), and with plates 1 - by hooking elements 7 of the metal rod 8. The metal rod 8 is installed parallel to the end side of the plate 1. The sides of the plates 1 are provided with vertical keys 9, part of the voids 3 are simultaneously part of the grooves 10, their bottom parts are combined. A metal rod 8 passes through these grooves, behind which hook-shaped elements 7 of the strands are hooked 6. Each plate has means for increasing seismic resistance in the form of a zigzag wire 11, coupled with longitudinal rods with the possibility of tension, in the area formed by the crossbar 2 and plates 1, there is a longitudinal and transverse reinforcement 12. The crossbar can be made precast reinforced concrete, or metal, or precast metal. Optionally, the diameter of the wire of the reinforcing bars can be selected 10 mm, the rods of longitudinal-transverse reinforcement 5 mm, the zigzag wire 4 mm.

The longitudinal reinforcement of the lower and upper and lower layers of the plates are connected by means of the transverse reinforcement with a zigzag (wavy) wire, which makes it possible to keep the structure of the plate from destruction and delamination during seismic impact, as the tie ropes play the same role. they are connected to the reinforcement and to each other not rigidly, but with the possibility of sliding.

The use of metal strands that mate with each other by dressing, and with plates with hook-shaped elements by hooking them onto a metal rod, increases the strength and reliability of the structure during the action of seismic loads.

The presence of dowels on the longitudinal side of the plate increases the spatial rigidity of the frame, allowing the floor slabs to work as a single hard drive.

Thus, the plate junction according to the present invention of the plates allows the construction of buildings and structures in the most efficient and reliable way, especially in areas prone to earthquakes and other seismic loads.

Information sources

1. A.S. Toropov. Reinforcing work. M .: Higher School, 1976, p.30.

2. Application for utility model No. 2007141483 dated 12/12/2007, according to which a decision was made to grant a patent on 01/21/2008.

3. RF patent No. 1807195, Е04С 3/00, 1993.

Claims (2)

1. The interface of multi-hollow prestressed reinforced concrete slabs in an earthquake-resistant precast-monolithic overlap with longitudinal-transverse reinforcement, with the releases of reinforcing bars in the lower part of the mating slabs and additional connecting metal elements intended to be placed in the interplate joints, which are monolithic after installing the plates on the crossbar, forming a prefabricated monolithic overlapping disk, characterized in that the sides of the prestressed multi-hollow reinforced concrete slabs are provided with a vertical dowels, and end mating with a crossbar, facing each other with voids, with two grooves, made in place of the corresponding voids so that their bottom parts are the bottom of the voids, in each multi-hollow reinforced concrete slab, a metal rod is installed parallel to the end surface, and perpendicular to it, additional connecting metal elements-strands are introduced, which mate with each other through ligation, and with plates - hook-shaped elements by meshing with metal the core, means for increasing seismic resistance are made in the form of a transverse zigzag wire, conjugated with longitudinal reinforcing bars with the possibility of stretching. 2. The interface node according to claim 1, characterized in that the rods of longitudinal-transverse reinforcement are made with a wire with a diameter of 5 mm, the zigzag wire is selected with a diameter of 4 mm, the wire of the transverse bar that combines a part of the reinforcing rods of each of the plates is selected with a diameter of 10 mm.

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