Device to reinforce solid reinforced concrete slabs

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and may be used for radical reinforcement of slabs exposed to durable impact of aggressive medium and having practically lost bearing capacity. The device to reinforce a solid reinforced concrete slab includes several reinforcement elements and comprises two additional solid reinforced concrete slabs arranged on the top and at the bottom and combined to each other by means of reinforced concrete keys. The lower slab is equipped with rods with helical thread at the ends, performing the function of the pre-stressed working reinforcement, connected on nuts with anchors, which serve as stops for them. Anchors are connected with the main slab as a dowel by epoxide glue. Keys are equipped with vertical rods performing simultaneously the function of working reinforcement of keys and function of suspension in fixation of the lower slab formwork. The surface of contact between the main and lower slabs is equipped with a layer of compound on the basis of epoxide resin preventing access of aggressive medium to working reinforcement.

EFFECT: increased bearing capacity, stiffness and crack resistance of a slab.

3 dwg


The invention relates to the field of construction and can be used to significantly enhance the plates exposed to long-term effects of aggressive environments and almost lost carrying capacity.

Well-known device for a radical strengthening of slabs consisting of steel or reinforced concrete beams, summed up under the stove and perceives the entire load.

The obvious disadvantages of such gain is the high consumption of materials, violation of aesthetics and a significant decrease in the height of the room.

For the prototype accepted device [1], consisting of two thin concrete slabs, reinforced grids and placed at the top and bottom relative to strengthen the plate and interconnected concrete dowels. The disadvantages of gain is the complexity of quality concreting of the bottom layer. Mesh reinforcement prevents the free flow of the concrete mix on the surface of the formwork. The lack of anchoring of the working armature leads to early cracking and delamination of the lower layer prior to the destruction of the slab under load.

Technical results of the present invention is to increase the bearing capacity, stiffness and fracture toughness of the plate, reinforced offered by the device.

Device for amplifying solid concrete slabs which consists of two complementary monolithic concrete slabs, located on the top and bottom and interconnected concrete dowels. The bottom plate is provided with terminals with screw threaded on the ends that perform the function of pre-stressed working valves and are connected by nuts with anchors, which are stops. Anchor connected with the main plate type Nagel, epoxy glue. Dowels provided with vertical rods, while performing the function of a working rebar dowels and the function of the suspension mounting of the casing bottom plate. The contact surface between the main and the bottom plate provided with a layer of the compound based on epoxy resin preventing access to the corrosive environment to the working armature.

The proposed device for strengthening of continuous reinforced concrete slab with two additional monolithic concrete slabs is illustrated in the drawings, figure 1-3.

Figure 1 shows the layout and dimensions of the reinforced plate.

Figure 2 shows a reinforcing rod (4) Assembly with ankerwyke devices: washer (5) and nut (6), stop (7) and cotter pin (8).

Figure 3 shows the stop (7) and suspension (9) Assembly with washer (10) and nut (11).

The device includes a reinforced plate (1), drilled in the plate (1) hole (2) and (3)designed accordingly to accommodate lugs (7) and filling the casing (15) Beto is Noah mixture; reinforcing bars (4) with washers (5) and nuts (6); fences (7) with the cotter pins (8), designed for tension rebar (4); steel pendants (9) with washers (10), nuts (11) and the locking rods (12)intended for fastening the casing (15); reinforcement mesh (13); compound layer (14) on the basis of epoxy resin, designed to protect the valve (4) from the ingress of aggressive environment; formwork consisting of a control room (15); lower (16) and upper (17) monolithic slab strengthening from fine-grained concrete.

The device includes work in the following way: in the plate (1), after a preliminary marking, drill holes (2) and (3). On the ceiling surface of the plate (1) put a layer of compound (14) and make the shutter speed during the day. Reinforcing bars with thread cutting on the ends, (4) establish the lugs (7), washers (5) and nuts (6). Then the lugs (7) are inserted into holes (2) and fixed with epoxy glue and pins (8). After polymerization of the adhesive reinforcing bars (4) by screwing nuts (5) pull on the lugs (7). To the plate (1) so (9) install the casing (15) and fix its position on the stove top rods (12)and bottom nuts (11). Through holes (3) produce a concrete bottom slab reinforcement (16), the casing (15) is filled with a moving mixture of fine-grained concrete with a slump of not less than 12 cm; then fill themselves CTE is participation (3). Install reinforcing mesh (13) and concreted top slab reinforcement (17). After a set of concrete strength disassemble the casing (15)and projecting beyond the surface of the plate (16) the ends of the suspension rods (9) are cut off.

Sources of information

1. TI Baranova, I.S., Huckin, DSC. Safronov. Load-carrying capacity and stiffness of slabs reinforced with two sides by layers of concrete, the United concrete dowels [text] / Local architecture and construction. - Penza: PGAS, 2010. - Issue №2 (9).

A device for strengthening a solid reinforced concrete slabs damaged by prolonged exposure to harsh environments, including two additional monolithic concrete slabs located at the top and bottom and interconnected concrete dowels, characterized in that the bottom plate is provided with terminals with screw threaded on the ends that perform the function of pre-stressed working valve connected on the nuts with anchors, which are stops and connected with the main plate type Nagel epoxy glue, dowels provided with vertical rods, while performing the function of the working reinforcement dowels and the function of the suspension mounting of the casing bottom plate, and the contact surface between the main and the bottom plate provided with a layer of the compound based on epoxy with the Ola, preventing access to the corrosive environment to the working armature.


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