Architectural and space-planning solutions

The cafe and cooking facilities are designed only on the ground floor. Two elevators along the axes Н-К/18-21 are placed in the atrium and designed as panoramic ones (with a load capacity of 630 kg AXELS Italy). The staircase from the axes S-R/17-21 was transferred to the axes M-L/11-13. The design of the outer walls has been changed. The outer layer is made of ceramic porous stone M 150, 510 mm thick at the level of the first floor, 380 mm - on subsequent floors, with a finishing layer of silicate plaster 30 mm thick. The inner layer is made of aerated concrete with a density of 400 kg/m³ and a thickness of 250 mm. The conference hall (room 417) was moved from axes N-S/14-21 to axes G-L/9-13. The location of partitions in the technical underground has been changed in connection with the issuance of new special technical conditions for the design of fire protection. The planning decisions of the premises of the courtrooms (54 premises) on the 1st to 7th floors have been changed. The design of the outer walls has been changed. The outer layer is made of ceramic porous stone M 150, 510 mm thick at the level of the first floor, 380 mm - on subsequent floors, with a finishing layer of silicate plaster 30 mm thick. The inner layer is made of aerated concrete with a density of 400 kg/m³ and a thickness of 250 mm. The location of partitions in the technical underground has been changed in connection with the issuance of new special technical conditions for the design of fire protection. The design of the outer walls has been changed. The outer layer is made of ceramic porous stone M 150, 510 mm thick at the level of the first floor, 380 mm - on subsequent floors, with a finishing layer of silicate plaster 30 mm thick. The inner layer is made of aerated concrete with a density of 400 kg/m³ and a thickness of 250 mm.

Structural and space-planning solutions

The constructive solutions of the project that received a positive opinion were amended in accordance with the customer's assignment to change the design solutions. The design section provides: change in the design scheme of all buildings. Replacement of load-bearing brick walls, elements of the internal steel frame and prefabricated reinforced concrete floors with a complete monolithic reinforced concrete articulated frame, consisting of a system of monolithic reinforced concrete columns, stiffening diaphragms and beam floors; replacement of Fundex piles with a diameter of 380 mm for bored piles with a diameter of 450 mm, manufactured using CFA and DDS technology; replacement of strip and cluster pile grillages with monolithic reinforced concrete slab grillages 650 mm high; increase in the height of the technical underground from 1,8 m to 2,35 m due to a change in the type of grillage; the outer walls are designed as self-supporting instead of load-bearing; replacement of prefabricated reinforced concrete steps with monolithic reinforced concrete steps along steel stringers and arrangement of platforms made of monolithic reinforced concrete; in the structures of the transitions, the step of the columns and the departure of the floor consoles have slightly changed; in the steel structures of the roofing of building A, the geometric dimensions of the roof trusses were changed: the span of the atrium trusses was taken to be 45 m, the winter garden - 14,26 m, the assembly hall - 14,76 and 26,26 m. The trusses are supported by monolithic reinforced concrete columns, united by monolithic reinforced concrete beams ; at the elevation of plus 16,750 in building "A" a two-height VIP-hall with a dome cover was designed, in connection with which the ceiling at the elevation of plus 20,350 is canceled. The dome is a shell of double positive curvature made of monolithic reinforced concrete with a thickness of 150 mm, the supporting ring of the dome is a circular beam with a section of 490 x 200 mm, which rests on the brick walls of the drum, reinforced with monolithic reinforced concrete cores with a section of 130 x 250 mm for the entire height of the wall. The frame columns of all buildings and passages are designed according to an irregular grid of 3,2 ÷ 7,5 x 2,85 ÷ 9,0 m. The columns are monolithic reinforced concrete, with a section of 500x500 mm 400 x 400 mm). The outer walls of the technical underground and basement are designed from monolithic reinforced concrete of class B25, F150, W6 400 mm thick, insulated from the inside with a layer of mineral wool 50 mm thick. Frame beams - monolithic reinforced concrete, section 400 ÷ 500 x 500 ÷ 800 (H) mm. Ceilings - beam slabs of monolithic reinforced concrete with a thickness of 180 and 200 mm. The diaphragms are designed from monolithic reinforced concrete 160 mm thick. The material of load-bearing ground structures is concrete of class B30, F100, reinforcement of class A-III. External walls - self-supporting two-layer, consisting of an outer and an inner layer. The fastening of the walls to the frame elements is provided by corrosion-resistant flexible ties. The outer layer is made of ceramic porous stone M 150, F 50 on a mortar M 100, 510 mm thick at the level of the first floor and 380 mm on subsequent floors, supported by monolithic basement walls. The inner layer is made of aerated concrete D 400 of class B2,5, F25, 250 mm thick, with floor-by-floor support on floors. The spatial rigidity and stability of the hulls is ensured by the joint work of vertical elements united by horizontal disks of floors and roofs. The foundations of all buildings are piled. Bored piles - diameter 450 mm, 25 m long before cutting from ground level, are made according to DDS and CFA technology. The design load on the pile, equal to 160 tf, was adopted based on the results of working tests of piles with a static indentation load. Expected draft - 2 ÷ 3 cm. In accordance with the report on engineering and geological surveys, the lower ends of the piles are immersed in soils: EGE-11, bluish-green silty clays (IL=-0,41; E=260 kg/cm², e=0,505) and EGE-10 , bluish-green silty clays with fragments of sandstone dislocated solid (IL=-0,16; E=180 kg/cm², e=0,55). The connection between piles and grillage is rigid. Grillage - slab height 650 mm. Concrete preparation 70 mm thick is provided under the grillages. The material of piles and grillages is concrete B25, F150, W6. Structural analysis was performed using the SCAD 11.1 and 11.3 software package.