Architectural and space-planning solutions

The design documentation provides for the construction of a business center with built-in underground parking. The main entrance to the building and the entrance to the underground car park are provided from the street. The designed twelve-story business center has dimensions in the axes of 44.75x36,5 m and a height of 44,58 m from the planning ground level to the top of the building parapet. The light lantern illuminating the technical premises of the upper floor with an area of ​​338 m² (not more than 25% of the total roof area) exceeds the specified height by 2,5 m. By designation, the designed building belongs to public buildings, which includes the following premises: office (administrative) premises , cafe premises, functionally connected with the office building; car parking. Office premises occupy part of the first floor and completely occupy floors 2-12. On the ground floor, an entrance group, a cafe with 56 seats for servicing the employees of the business center, office space, rooms for serving the disabled and rooms for attendants are designed. Office premises are designed from the second to the twelfth floor. A built-in parking lot for 68 parking spaces for employees' cars is designed in two underground floors of the building. Functional connection of the underground parking and office floors is provided with the help of a passenger-and-freight elevator with a carrying capacity of 1000 kg. Four elevators are designed in the business center building. Three lifts Q=630kg are provided for servicing the overground floors of the business center. Elevator Q=1000kg - for transporting fire departments to all floors. For the relative mark of 0,000, the mark of the clean floor of the 1st floor was taken, which corresponds to the absolute mark of 7,57 m. The exterior decoration of the building provides for the use of stained-glass glazing of the main facade and facing with artificial stone of the side facades. The covering is flat, the roof is rolled, partially inverted. The planning decisions of the business center building provide for the service of disabled people in wheelchairs. For MGN in the cafe there is a special place for eating. Maintenance of MGN in a cafe is possible both independently (the passage area at the distributing line is 1 m wide) or by a cafe employee engaged in distributing dishes. The lobby (room 101) provides a waiting area for visitors and visitors with limited mobility (including disabled people in wheelchairs, people with complete loss of vision and the visually impaired).

Structural and space-planning solutions

Responsibility level – II, normal. The building was designed from monolithic reinforced concrete according to a combined structural scheme. At the level of two underground floors - according to an incomplete frame structural scheme with load-bearing external walls, internal columns and stiffening diaphragms. Above the ground level - a bonded reinforced concrete frame with internal stiffening diaphragms and external portal connections. The walls of the underground part: external - 250 mm thick, pilasters - 600 mm. Internal walls of the building (stiffness diaphragms) - 300mm thick. The columns are taken with a section of 500 x 500, 600 x 600, 700 x 700 mm. The frame columns are designed according to the grid 3,0÷6,5 x 3,0÷7,5m. Portal links - from steel round pipes, steel C345. Ceilings above the underground floors and ramp ramp - 250mm thick. Floor and coating slabs - 200 mm thick, partially - with ribs with a section of 250-500 x 400-550 (H) mm in the central part. Stairs - monolithic reinforced concrete marches and platforms. Elevator shafts - voluminous prefabricated reinforced concrete elements. The material of load-bearing monolithic structures is as follows: Concrete of foundation walls, ramp walls of class B25, F50, W6, Concrete of diaphragms, ceilings, ramps and columns of class B30, F100, W6. External non-bearing walls - three-layer, with floor-by-floor support on ceilings, from a layer of aerated concrete blocks D600, B5, F35 250 mm thick, a layer of mineral wool insulation 100 mm thick and a ventilated facade system with porcelain stoneware cladding. Fastening of the outer walls to the load-bearing and building structures and connection of the layers are provided by flexible connections with anti-corrosion coating. Structural solutions for fastening the ventilated facade system to the supporting structures of the building are developed in the working documentation in accordance with the current technical certificate of the Ministry of Regional Development of the Russian Federation. The spatial rigidity and stability of the building is ensured by the joint work of vertical elements united by horizontal disks of floors and roofs. The static calculation of the load-bearing structures of the building, taking into account the joint work of the building with the base, was performed using the ING + software package. Horizontal movement of the top of the building 47 mm; acceleration of vibrations of building structures, arising from the pulsation of the velocity pressure of the wind 0,1 m/sec2, which does not exceed the maximum permissible values. The foundations of the building are piled, from bored piles with a diameter of 420 mm, a length of 13 m from the bottom of the grillage, performed using the FUNDEX technology. Pile material - concrete of class B25, F150, W6, reinforcement of class AIII, AI. The calculated pile load of 150 tf was adopted on the basis of pre-design tests of piles with a static indentation load. The project provides for control tests of piles. The relative mark of 0,000 corresponds to the absolute mark of 7,570. In accordance with the report on engineering and geological surveys, the lower ends of the piles are immersed in the EGE-8 soil - hard clays, E = 240 kgf / cm², JL = -0,15. The expected design draft is 3,0 cm. Pairing of piles and grillage is rigid. Under the grillage, concrete preparation is provided from concrete of class B 7,5 with a thickness of 100 mm for crushed stone preparation with a thickness of 300 mm. The maximum level of groundwater is expected near the daytime surface of the earth during the season of heavy heavy rains and snowmelt. Groundwater is slightly aggressive in terms of the content of aggressive carbon dioxide in relation to concrete of normal permeability. In order to protect the concrete of underground structures from groundwater, the design documentation provides for the use of concrete of increased water resistance grades for underground structures, waterproofing of underground structures. The standard freezing depth for bulk soils is 1,39 m, for clays 1,15 m.