Architectural and space-planning solutions

Electrical substation 110/20 kV is an object of engineering infrastructure and is intended for power supply of utility infrastructure facilities. The substation building is rectangular in plan, one-two-story with two separate volumes of staircases, with a technical underground 3,0 m high, with two floors 4,05 m high (from floor to floor - the first floor) and 3,6 m (in cleanliness - the second floor), with double-height rooms: power transformers with a height of 9,100 m, 110 kV switchgear rooms with a height of 7,65 m, ventilation chambers with a height of 7,65 m. The building houses: technological rooms - cable structures 110 kV and 20 kV , chambers of transformers T1 and T2, rooms of 110 kV switchgear and switchgear 20 kV, chambers of reactors No. 1 and No. 2, rooms of TSN No. 1 and No. 2, room for batteries, rooms for operating control rooms and communication panels, OVB and SRZA, rooms for engineering support - ventilation chambers No. 1 and No. 2, water metering unit, stairwells; administrative premises. The substation is designed with plan dimensions of 30,4 x 35,0 m. The height of the building maximum point is 12,75 m from the ground level. For the relative mark of 0,000, the mark of the finished floor of the 1st floor was taken, which corresponds to the absolute mark. 58.150 in BSV. All premises of the 1st floor have an entrance directly from the street. In the chambers of transformers along the axis 2 and 8 m / o B-V, two mounting openings with removable panels are provided. The roof is double-pitched from roofing sandwich panels with a slope for water runoff into external drainage trays and downspouts. The operation of the substation is provided without the constant presence of personnel. Maintenance of the station - operational-field team. The walls of the technical underground are monolithic reinforced concrete with a thickness of 400 mm. Columns - monolithic reinforced concrete, with a section of 400x400 mm, 400x600 mm, made of B25 class concrete. Bearing walls are monolithic reinforced concrete 200 mm thick. Overlappings - monolithic reinforced concrete 220 mm thick. Coating - monolithic reinforced concrete 220 mm thick on reinforced concrete beams. Partitions made of aerated concrete blocks 200 mm thick. Stairwells of type L1 in monolithic reinforced concrete walls with direct access to the street, prefabricated reinforced concrete marches supported by monolithic platforms. Access to the roof of the building is provided through two external metal fire escapes along the axis D m / o 1-2 and 8-9. External enclosing structures - hinged wall panels of the "Sandwich" type with insulation from non-combustible stone wool 100 mm thick. Sheathing of panels on the inside and outside of the building with a protective and decorative polymer coating of factory production. The plinth is designed from monolithic reinforced concrete with artificial stone trim. The facades of the substation building are designed using modern enclosing structures, the exterior finish is polymer-painted steel sheet, which is part of a three-layer sandwich panel structure. The color of the facade panels is adopted in accordance with the color used in the decoration of the substation 330 kV Pulkovskaya substation, which has the corporate colors of FGC UES. The plinth is finished with an artificial stone cladding with a rough texture. In the interior decoration, materials were used in accordance with the purpose of the premises. For covering floors in stairwells, dignity. nodes, corridors in the accumulator room, ceramic tiles are provided (acid-resistant tiles in the accumulator room); in the premises of communication panels - antistatic linoleum; in the rooms of ventilation chambers, cable, water metering unit, spare parts, OVB, SRZA, OVB, SRZA, TSN, DGK chambers, OPU - Painting with organosilicate composition OS 52-20.

Structural and space-planning solutions

The level of responsibility of the building is II, normal. The building was designed according to the column-wall structural scheme. Columns - with a section of 400x400 and 400 x 600 mm. The frame columns are designed according to the grid 6,0 x 5,0÷8,0 m. ) mm. The load-bearing walls of the building are monolithic reinforced concrete 400 mm thick. Ceilings - slabs of monolithic reinforced concrete 600 mm thick on monolithic beams and walls. Stairs - prefabricated reinforced concrete marches on monolithic platforms. The material of ground structures is B400 class concrete, A800 class reinforcement. The building is equipped with overhead crane beams with a lifting capacity of 300 tf and 600 tf. The outer walls of the technical underground are monolithic reinforced concrete 200 mm thick, concrete B220, W25, F400, class A1 reinforcement. External enclosing structures - hinged wall panels of the "sandwich" type with a thickness of 2 mm. The load-bearing structures of the coating are a gable truss system of steel beams and purlins made of rolled profiles, covered with roofing sandwich panels 400 mm thick with mineral wool insulation. The spatial rigidity and stability of buildings is ensured by the joint work of vertical load-bearing elements and hard disks of floors and roofs. The calculation of load-bearing structures was performed taking into account the joint work of the building with the base using the ING + software package version 25. The relative elevation of 6 corresponds to the absolute elevation of 150. The foundations were adopted - on a natural basis, in the form of a monolithic reinforced concrete slab 400 mm thick. Concrete B100, W100. Under the foundation slab, concrete preparation is provided from concrete of class B10 with a thickness of 0,000 mm for crushed stone preparation with a thickness of 58,15 mm. The basis of the foundation is the EGE-500 soil - light silty solid loams with φ=25, e=6, E=7,5kgf/cm100. Estimated soil resistance of the base is 150 tf/m2. The expected settlement of the building is 25 cm. Waterproofing of the underground space from groundwater: the use of concrete of a higher water resistance grade for the foundation slab and external walls; coating waterproofing device on the outer walls; the use of waterproofing gaskets in the working seams of concreting. The water tanks are buried structures with plan dimensions of 0,499 x 150 m and a depth of 2 m. The material of the walls and bottom is monolithic reinforced concrete of class B30, W2. The covering is made of prefabricated reinforced concrete ribbed slabs. The project provides for internal waterproofing of tanks with an Aquatron, coating with bituminous mastic of external surfaces in contact with the ground. Under the bottom slab, a concrete preparation 2,0 mm thick is provided from concrete of class B 6,0 for crushed stone preparation 10,3 mm thick. At the base are light, silty, solid loams. The relative elevation of 4,0 is taken as the planning elevation corresponding to the absolute elevation of 25.