We reduce the cost of construction of buildings and structures up to 20%

Industrial floors with a pre-tensioning system (unbonded) 200 mm thick.

Maximum post load 0.15×0.15m: Рр = 10.8 t. Installation of two posts of adjacent racks at a distance of 330 mm between each other for the inner rows of posts was taken into account. The floor slab is supported by prefabricated reinforced concrete piles 300x300mm in increments of 1.7×1.7 m. A through installation of strands through all concreting bays over the entire length is provided. The distance between expansion joints is 120 m.

Girders of T-section, without
prestressed reinforcement with increased height up to 1080 mm and slab thickness 180 mm. Girders reinforcement consists of external steel tendons using the unbonded pre-stressing system of STS Ltd. For different spans, a different type of reinforcement is provided. It depends on availability of the existing girders and location of new girders in this span

Reinforcement provides for load capacity of the superstructures in terms of bending moment to carry loads A11 and NK-80 in case of emergency breakage of 2 lower principal longitudinal reinforcing bars of old girders.

4-5 store buildings with underground parking. The grid of columns is 8.1×8.1 m. Prestressed girders with a span of up to 16.2 m, height of 700 mm and width of 1600-2500 mm. Prestressed floor girder with corbel-type sections with overhang of up to 8.1 m, girder height 400 mm, width 1000-1300 mm. Flooring concrete B30. Thickness of the floors – 250 mm, of covering – 300 mm.

Resting of columns of upper stores on the middle of girder span 16.2 m long.

Warehouse with girder floor of cast-in-place prestressed reinforced concrete. Girder spans 21.8 m. Flooring area 21,000 m2. Payload 500 kg/m2.

Increased level of responsibility, unbonded system, insulated anchors.

: Water sump tank. The walls of the tank are made of cast-in-place reinforced concrete with thickness of 300 mm and height of 4400 mm. The outer radius of the tank is 26 m. Concrete B25. Water pressure is provided with height of 4100 mm from the bottom of the wall. At 356 degrees there is a hole 1200 x 1500 mm. The joint of the wall and bottom plate is hinged.

Replacing the original solution to wind high-strength wire with the solution to use K-7 strands in a protective sheathe (unbonded).

Pre-stressed ties of roof arches.

Prestressed ties are designed to absorb thrust of the roof arches of 99 m span.

(Русский) Система преднапряжения защитной оболочки (СПЗО) на объектах использования атомной энергии (ОИАЭ)

(Русский) Система преднапряжения защитной оболочки (СПЗО) – совокупность горизонтальных и вертикальных арматурных пучков, предназначенная для обжатия внутренней защитной оболочки, в целях восприятия растягивающих усилий, возникающих при действии внутреннего избыточного давления в случае аварии. Таким образом, обеспечивается прочность и трещиностойкость железобетонных сечений оболочки при малых процентах ненапрягаемой арматуры. Внутренняя защитная оболочка (ВЗО) – сооружение из предварительно напряженного железобетона, состоящее из цилиндрической части и полусферического купола. Специалистами АО «Институт технологий преднапряжения» были выполнены комплекты рабочей документации на СПЗО, по следующим объектам:
1. Ленинградская АЭС-2 блок №1;
2. Курская АЭС-2, блоки №1 и №2;
3. АЭС Аккую, блоки №1 и №2;
4. Ростовская АЭС (замена элементов).