General information.

Children's educational institution for 125 places is designed 3 storey, with a basement, which is technical for wiring engineering communications. The building has a rectangular shape in plan with dimensions in the axes 35,00x28,00 m. The total height from the ground level is 13,940 m (elev. +90,390 in Baltic system of heights). The height of the basement is 3,4 m, the height of the first, second and third floors is 3,3 m. The level of responsibility of the building is normal, the reliability coefficient according to liability 1,0. The structural scheme of the building is cross-wall. Building designed with load-bearing longitudinal and transverse walls. Rigidity buildings are provided with the use of reinforced concrete load-bearing structures: horizontal floor and roof slabs, and vertical wall slabs panels. The stability of the load-bearing elements is ensured by a system of cross located wall panels acting as stiffening diaphragms, installed in the longitudinal and transverse directions and forming the core rigidity. Spatial rigidity and stability of the building and its individual elements is ensured by the joint work of the cross-wall system for account of the floor disks of the floor. Wall panels rest on each other floor by floor without local eccentricities. This ensures their operation as stiffening diaphragms throughout the height of the building up to the foundations. Element connection nodes designed in such a way that they convey the perceived vertical and horizontal loads on load-bearing structures and structures, providing rigidity.

Foundations.

The foundations of the kindergarten building are designed on a natural the base, which is a compacted sand and gravel pad (GOST 23735-79 Sand and gravel mixes for construction works. Specifications.) The foundations are designed as a monolithic slab 500 mm thick, mark the bottom of the slab is -4,100 m, which corresponds to the abs.elev. +72,350 m. When excavating the pit, the soils are bulk, compacted, light loams, dusty, semi-solid, collapsible, malleable when soaked, located up to the level of +71,100 are subject to complete excavation with their replacement with sand gravel backfill with layer-by-layer compaction up to a compaction factor of 0,95. For underground structures, concrete of strength class B25 is used, grades F100 for frost resistance and W8 for water resistance. The foundation slab is reinforced with separate longitudinal and transverse rods Ø12 A500S (GOST R 52544-2006) with a pitch of 200 mm. In places of support walls additionally fit transverse reinforcement Ø12 A500S (GOST R 52544- 2006) with a pitch of 200 mm in the lower zone between the main reinforcement plates. In the upper zone of the slab in the inter-wall space and additionally transverse and longitudinal reinforcement Ø12 A500S (GOST R 52544-2006) is laid with step 200 mm in the intervals between the main reinforcement of the slab. protective layer concrete on the bottom reinforcement is 50 mm, the protective layer of concrete on the top reinforcement - 30 mm.

Socle wall panels.

The outer walls of the basement are made of prefabricated three-layer reinforced concrete panels with a thickness of 400 mm with a protective shell made of concrete increased water resistance. Concrete outer and inner shells class B25 for strength, F100 for frost resistance and W8 for water resistance. The outer shell of the panel is reinforced with welded meshes of Ø6 A500C (GOST 23279-85) in 150 mm increments. The inner shell of the panel is reinforced with two welded meshes Ø8 A500S (GOST 23279-85) with a step of 150 mm. As a heater the material used is expanded polystyrene 80 mm thick. Cover thickness concrete is 30 mm. The internal walls of the basement are designed from prefabricated reinforced concrete panels 200 mm thick. Concrete class B25 for strength and W8 for waterproof. The panels are reinforced with welded mesh Ø8 A500C (GOST R 52544-2006) in 150 mm increments. The thickness of the concrete protective layer is 30 mm.

Above ground structures.

External walls of the building (bearing and self-supporting) - three-layer prefabricated reinforced concrete panels. Panel thickness 400 mm. Outer sheath (protective shell) is designed from concrete of strength class B25, grades F75 according to frost resistance and W6 for water resistance. Internal load-bearing part of the panel designed from concrete of strength class B25, grades F75 for frost resistance and W6 for water resistance. The outer shell of the panel is reinforced with welded grids from Ø6 A500S (GOST 23279-85) with a step of 150 mm. Inner shell panels are reinforced with two welded meshes Ø8 A500C (GOST 23279-85) with a step 150 mm. Rockwool merial used as insulation Concrete Element BATTS 170 mm thick. Connection of precast concrete exterior wall panels between is carried out using proven PVL embedded products. Used embedded products are certified and have high Specifications (Peikko Group Catalog). Internal walls of the building - precast concrete panels with a thickness of 200 mm. Concrete class B25 for strength and grade W4 for water resistance. Internal panels are reinforced with two welded meshes (internal and external) from Ø8 A500S (GOST 23279-85) with a step of 150 mm. Ceilings are made of prefabricated prestressed multi-hollow reinforced concrete slabs 220 mm thick. Applicable boards - multi-hollow with round voids without formwork molding. Plates are developed and produced at the plant of reinforced concrete products according to TU 5842-004- 59387767-2005 "Reinforced concrete multi-hollow slabs without formwork molding” (Certificate of conformity is attached). Overlaps are floor hard disks that transfer the horizontal load to the walls stiffness diaphragms.