Architectural and space-planning solutions

The design documentation provides for a major overhaul of the GOU building. The existing school building was built in the middle of the last century and is a detached brick 3-storey building with a hip roof with a basement, an attic and a later 2-storey extension with a flat roof. The building has a broken L-shaped outline with dimensions in the extreme axes (71.34+8.62)x(11.59+29.58)m. The height from the ground level to the parapet is 15.14m. The height from the planning mark of the ground to the highest point of the building - the ridge is 17.21m. The building is oriented with the main facade towards the embankment. For a relative mark of 0.000, the mark of the finished floor of the 1st floor of the building was taken. The functional purpose of the building is a secondary school of I, II and III levels of education, designed for 400 students. The maximum number of students in a class is 20. The design documentation provides for: redevelopment of premises; insulation of facades and attic floors; selective repair of the roof truss system, replacement of roofing, roof fencing; repair of blind areas, porches and replacement of stair and porch railings; replacement of window and door blocks; arrangement of visors over the entrances; replacement of structures and floor coverings; finishing facilities. The redevelopment of the premises did not entail a change in the structural scheme of the building and the volumetric-spatial and architectural-artistic solution. Ventilation chambers, a water metering unit and engineering communications wiring are arranged in the basement. On the ground floor, the following are planned: entrance and vestibule groups with wardrobes, offices of the director and teachers, an additional education office, a hall for mass events with a dressing room, a medical center, a reading room, a book depository, a dining room with a kitchen and a dining room, an electrical panel room, and latrines. On the second floor are designed: primary school classrooms, classrooms for special and exact disciplines, a teacher's room, a sports hall with auxiliary facilities (cloakrooms, showers, latrines, an instructor's room, an inventory room), latrines. On the third floor there are classrooms for the primary and senior schools, computer classes, laboratory rooms, a museum, and latrines. In the technical attic - ventilation chambers. In the school building there are 3 staircases of type L1, which have access to the territory adjacent to the building. There are exits from the basement floor, separated from the common staircases of the building and leading directly to the outside. Existing brick exterior walls are insulated from the outside with mineral wool boards, followed by the application of a protective and decorative layer of plaster. The plinth is insulated from the outside with polystyrene foam plates, followed by porcelain stoneware cladding. The newly erected partitions are brick. New windows - PVC profiles with double-glazed windows. Newly installed doors - metal-plastic and metal, service and wooden, glazed and deaf, fire-resistant and ordinary. Floors - ceramic tiles, homogeneous linoleum TZI, rolled sports flooring, ceramic granite, laminate, concrete. The covering of the main volume is a hip rafter, with a roof made of roofing steel. The covering of the extension is flat combined, insulated with a roof made of rolled material. Drainage - external organized. Interior decoration of walls and partitions - cement-sand plaster and decorative plaster, followed by painting with water-dispersed paints, glass, ceramic tiles. Ceilings - water-based paint. Suspended ceilings - type "Armstrong" and "Ekophon Industry". False ceilings - slatted. The project provides for measures to ensure the accessibility of the building for people with limited mobility. One of the entrances to the building is equipped with a ramp. The ramps have a width of at least 1.20 m, a slope of 8%, sides - a height of 0.15 m, a hard surface that does not allow slipping.

 Structural and space-planning solutions

 Structural scheme of the building: In axes A-E/1-5, A-E/10-18 - frameless with load-bearing longitudinal walls. In axes A-E/5-10, Zh-L/15-18 - incomplete frame. The spatial rigidity of the building is ensured by the joint work of the brick walls, frame and floor discs. The foundations for the walls are strip rubble and from prefabricated concrete wall blocks on reinforced concrete pillows. Under brick pillars - columnar rubble, under reinforced concrete columns - monolithic reinforced concrete columnar. The walls are made of solid clay bricks on a cement-lime mortar. Frame: In axes A-E/5-10 - brick pillars and metal girders. In the axes Zh-L / 15-18 - prefabricated reinforced concrete columns of the II20 series and crossbars. Ceilings: Above the basement - concrete vaults with brick filling along metal beams and prefabricated reinforced concrete hollow core slabs in the axes Zh-L / 15-18. Above the 1st floor - on wooden beams, on metal beams with concrete filling and from prefabricated reinforced concrete slabs. Above the 2nd floor and attic - on wooden beams. Roofing - from roofing steel on wooden layered rafters. Coating m / o Zh-L / 15-18 - combined on prefabricated reinforced concrete hollow core slabs. Roof - rolled. Stairs - reinforced concrete and stone steps on metal stringers. The technical conclusion based on the results of the survey of building structures of the building has been completed. A survey of the foundations with a fragment of the pits found that the foundations are in working order. The conclusion about the engineering-geological conditions of the site is made. The foundation soil is light, silty gray loam, with interlayers of sand, soft-plastic with the following physical and mechanical characteristics: ; c = 0,22 kg/cm2; E = 95 kg/m3. The maximum position of the groundwater level is at a depth of 0,20 m from the earth's surface at abs. elev. 4.20m. It was established by verification calculation that strengthening of the foundations is not required. Brickwork of walls and pillars is in working condition, reinforcement is not required. The compressive strength of the brickwork of the walls, determined by the non-destructive method with the IPS-MG4 device, R = 11-13 kg / cm2 (brick M75 for external walls, M100 for internal walls. Solution M25). The frame and reinforced concrete floor slabs and coatings m/o Zh-L/15-18 are in working order. The ceiling above the basement is in working order, except for the ceiling of m / o 8-9 / E-I, since the corrosion of metal beams is 40%. This section of the roof needs to be replaced. Ceiling over the 1st floor of m / o 5-10 / A-E - inoperative - chipping of concrete filling. Ceilings on wooden beams are subject to replacement according to fire safety requirements. The structure of the stairs is in working condition. In the rafter system, during the examination, areas with rotten maueralat wood, rafter legs, and battens were found. The general condition of the truss system is limited working capacity. The project provides for: replacement of the existing ceiling above the basement of m / o 8-9 / E-I with a monolithic reinforced concrete slab on metal beams; preservation of the existing metal floor beams above the 1st floor of m / o 5-10 / A-E with the replacement of the concrete filling, which is in an unsatisfactory condition, with a monolithic reinforced concrete slab along the H44-1000-0.7 corrugated board along the metal beams; dismantling of existing floors on wooden beams and installation of new floors from a monolithic reinforced concrete slab on H44-1000-0.7 corrugated board on metal beams. B20 class concrete; replacement and strengthening of elements of a wooden truss system; the device of new openings with the installation of metal jumpers from rolled profiles; repair of existing porches along axis 1, I/7-8; L/15-18. The new porch and ramp of the main entrance and the porch along the axis 15 m / o K-L are monolithic reinforced concrete. Concrete B15W6. Foundation - monolithic reinforced concrete slab 150mm thick; repair of pits with replacement of destroyed steps with monolithic reinforced concrete ones.