METHOD OF REINFORCING AND INCREASING BEARING CAPACITY AND SEISMIC RESISTANCE OF HEAD WALL OF RIVER-BED BUILDING OF HYDROELECTRIC POWER PLANT Russian patent published in 2025 - IPC E02B9/00 E02B1/00 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, namely to reinforcement of reinforced concrete building structures of the hydroelectric power station in operation for a long period of time. Technical result is achieved by using a system of external reinforcement arranged on both sides of the reinforced concrete pressure wall of the channel building of the hydroelectric power station: on the side of the headwater – in the span between the supporting piers, on the side of the machine room – along the entire length of the span of the pressure wall, by cross gluing in two to five layers on the surface of the pressure wall of carbon tapes with the value of acute angles of their intersection of the longitudinal axis of the pressure wall equal to 30-50 degrees, wherein each subsequent layer is cut not closer than 150 mm from the cut of the previous layer; clear distance between carbon tapes is taken to be not less than 300 mm and not more than 1/4 of pressure wall thickness; joining of carbon tapes is performed with overlapping length of not less than 300 mm; before the beginning of works on the external reinforcement system, the gates are installed into the slots of the hydroelectric power station building supporting piers and the work area is dried from the upper pool side, then the pressure wall surfaces are levelled and cleaned; after gluing, the carbon tapes are additionally fixed with carbon anchor bundles, for which at the intersection of the carbon tapes through them at an angle of minus 30 to minus 45 degrees to the horizontal, holes are made in the pressure wall for the anchor bundle with diameter 3-6 mm greater than the diameter of the anchor bundle and length not less than 30 of its diameters, then the anchor harness is glued into the prepared hole; after installation of the external reinforcement system, a protective coating is applied on it, and from the side of the machine room, a fire-retardant coating is additionally applied.

EFFECT: invention can be used to increase their bearing capacity and earthquake resistance.

7 cl, 4 dwg