Architectural and space-planning solutions

A preschool educational institution (DOE) is designed in the eastern part of the construction site. The main facade of the building is oriented directly to the territory of the preschool educational institution, which is part of the residential complex. The building of the preschool educational institution is designed as a free-standing, three-story building, in a prefabricated reinforced concrete frame and with external walls made of products manufactured by OAO PA Barrikada. The building is designed with a complex cruciform configuration in plan, with a basement, without an attic, with the main dimensions in the axes 40,2x42,0 (m). The height of the building from ground level to the top of the parapet is 12,15 m. The height of the premises of 1, 2-3 floors is 3,03 m clean. The mark of the floor of the first floor is taken as 0,000. The pre-school educational institution is provided for 8 groups of different ages and is designed for 135 children. Group cells are designed in the northern and southern parts of the building on the 1st floor and in the northern, southern and western parts on the 2nd and 3rd floors. In the western and eastern parts of the building on the 1st floor and in the eastern part of the building on the 2nd and 3rd floors, specialized, auxiliary, utility and engineering premises are designed. For communication between floors, there are 2 evacuation stairs in L1 type stairwells and one external closed metal evacuation staircase for evacuation from the premises of the second floor. Three cargo lifts with a carrying capacity of 100 kg were designed for lifting food and linen. The basement floor includes: a laundry room, a pantry, a maintenance workshop, as well as premises for building maintenance (ITP, cable, water metering unit, pool technical room, temporary storage room for fluorescent lamps). On the first floor of the building, 2 group cells, a pool block with a 3x7 meter bath, a catering unit and medical facilities are designed. On the second floor, in addition to 3 group cells, a gymnastics hall, universal club rooms and administrative rooms are designed. On the third floor there are 3 group cells, a hall for music lessons, universal club rooms and administration rooms. In each group cell, a dressing room, a pantry, a playroom, a bedroom and a toilet are designed. From each group cell, two exits to the outside are designed through a corridor and a staircase. External walls - from three-layer reinforced concrete panels painted with facade paints. Plinth - porcelain stoneware cladding. Doors - metal, improved. Windows - metal-plastic with energy-efficient single-chamber double-glazed windows. The roof is rolled. The cover is flat. The drain is internal. Visors above the entrances are made of transparent polycarbonate on a metal frame with a polymer coating. The project documentation provides for measures to ensure the accessibility of the facility for people with limited mobility, including wheelchair users. In places where sidewalks intersect with a carriageway or other sidewalk, a side stone is lowered. Designed normative longitudinal and transverse slopes on the paths of pedestrian traffic. For MGN access to the first floor of the preschool educational institution, a ramp with a fence was designed. The surface of ramps, porches and corridors is provided with non-slip materials.

Structural and space-planning solutions

Building responsibility level – II. The building of the preschool educational institution was designed in a braced frame of the 1.022 KL-2 series from standard prefabricated reinforced concrete elements of prefabricated production by OAO PO Barrikada. Columns - prefabricated reinforced concrete section 4040 cm. Crossbars - prefabricated reinforced concrete tee sections with a height of 45 cm with a span of 6.0 m and a height of 60 cm with a span of 9.0 m. Stiffness diaphragms - prefabricated reinforced concrete panels with a thickness of 140 mm. Ceilings and roofing - from prefabricated reinforced concrete bonded solid slabs and ordinary multi-hollow flooring 220 mm thick. Overlap above the pool area - flat slabs-spacers 220 mm thick. The external enclosing walls and basement walls are designed as self-supporting 400 mm thick three-layer wall panels resting on precast concrete foundation beams. Rigidity, stability and geometric immutability of the building are provided by rigid pinching of columns in the foundation, joint work of frames and stiffening diaphragms, hard disks of floors and roofing. The rigidity of the disk of floors and roofing is ensured by the installation of spacer plates along the axes of the columns, which have a welded connection with crossbars. Pools - a monolithic reinforced concrete bowl made of monolithic reinforced concrete B25, W8 (bottom thickness 200-400 mm along beams 300500 (h) mm, wall thickness 200 mm) on racks with a section of 300 × 300 mm. The project provides for internal waterproofing of the pool bowl. Internal stairs - prefabricated reinforced concrete marches and platforms. Walls of stairwells and elevator shafts - masonry of hollow brick M125 on mortar M50 250 mm thick. External stairs are made of steel structures. The design of the external steel staircase intended for climbing to the roof of a one-story part of the building is based on free-standing foundations made of monolithic reinforced concrete. The structure of the external steel staircase from the level of the second floor is based on the roof structure of the one-story part of the building. To support the load-bearing elements of the stairs, distribution beams are provided at the level of the roofing pie. The rigidity and stability of the structures of external steel stairs is provided by longitudinal ties in the form of stringers and rigid junctions of racks and beams of platforms. The relative mark of 0,000 corresponds to the absolute mark of +54.80. The load-bearing structures were calculated using the Lira 9.4 software package. The foundations are taken on a natural basis, columnar, glass type, from monolithic reinforced concrete B25, W6, F150 - under the frame columns, and strip of precast concrete blocks on prefabricated slabs - under the stiffening diaphragms and walls of elevator shafts. Foundations for the supporting structures of the pool - in the form of slabs 600 mm thick, united by cross beams with a section of 300 x 600 (h) mm, from monolithic reinforced concrete B25, W6, F150. Basement floor slab - from monolithic reinforced concrete of concrete class B25, W6, F50 130 mm thick with thickenings up to 310 mm for brick partitions 250 mm thick on sand preparation from medium-grained sand 200 mm thick. Under the foundations, concrete preparation is provided with a thickness of 100 mm. The foundations are based on silty loams with interlayers of sand, hard and plastic EGE 3 - EGE 5 (e = 0.539-0.615, IL = -0.15-0.18, E = 180-140 kg/cm2). Structures of porches, ramps and pits are monolithic reinforced concrete, made of concrete B25, W6, F150. In order to protect the concrete of underground structures, the concrete grade for water resistance is W6, coating waterproofing of the surfaces of concrete structures in contact with the ground is provided.