Architectural and space-planning solutions

Eight 5-storey sectional residential buildings with a separate boiler house and BKTP have been designed. Buildings 1 to 4 are U-shaped in plan, 6 sections, with overall dimensions in the axes - 71,08 x 51,80 m. Height from ground level to the top of the roof - 16,1 m. Maximum height - 19,2 m. Building 5 - U-shaped in plan, 6 - and sections, with overall dimensions in the axes - 55,40 x 73,81 m. Heights - similar to the first 4 buildings. Building 6 is rectangular in plan, 3 sections, dimensions in the axes - 11,59 x 90,42 m. Heights - similar. Building 7 - L-shaped in plan, 3 sections, with overall dimensions in the axes - 57,34x21,80m. Heights are the same. Building 8 - U-shaped in plan, 6 - and sectional, with overall dimensions in the axes - 35,53 x 95,33 m. Heights - similar. L1-type staircases and elevators are provided in the residential sections. There are ramps at the entrances. On the ground floor there are pantries for cleaning equipment. In the basement - ITP, cable, water meter units, engineering communications. switchboard - on the first floor. External curtain walls - panels with a wooden frame impregnated with fire retardant and antiseptic, mineral wool insulation 150 mm thick with a volumetric weight of 37 kg / m3, sheathed on both sides with gypsum fiber sheets 12,5 mm thick and reinforced on the outside with a cement-mineral slab (“aquapanel”) 12,0mm thick. Armo-cement slab is covered on the outside with colored mineral plaster 7 mm thick on a plastic mesh. A vapor barrier is provided on the inside of the panel, and a windproof film on the outside. The seams between the panels are made according to the series 050.10-00-0 "Knots of wooden fences of external wall panels", developed by CJSC "LenoblDomStroy". Plinth - cladding with artificial unedged stone. Window fillings - PVC profiles with micro-ventilation valves and double-glazed windows. Roof - combined, flat, unexploited, rolled, with internal drains. Exits to the roof - through the hatches above the last landing of stairwells. Block complete transformer substation is designed from prefabricated reinforced concrete. panels. The dimensions in the axes are 4,92 x 4,64 m, the height of the roof ridge from the ground level is 3,30 m. An asphalt concrete blind area 1,0 m wide is provided. A gas boiler house was designed - walls made of "sandwich" panels 100 mm thick on a steel frame, dimensions in axes - 11,0x12,0 m., height to the bottom of the supporting structures - 5,25 m (average), height to the top of the parapet - 6,55 m, the height of the cornice overhang is 5,70. Easily dumped structures - window openings with an area of ​​19,8 m2. Roofing - from "sandwich" panels, flat, combined, rolled, with an unorganized drain. Two chimneys with a diameter of 600 mm and a height of 20,0 m are insulated and lined with sheet steel roofing. The pipes are fixed to a bearing steel spatial vertical truss, triangular in plan with side dimensions in the axes of 1800 mm and a height of 19,35 m.

Structural and space-planning solutions

The project provides for the construction of a residential complex consisting of eight buildings, a gas boiler house and a transformer substation. Responsibility level – II, normal. The main load-bearing structures are designed in monolithic reinforced concrete. The buildings of the residential complex are divided into temperature compartments with a length not exceeding 52 m by seams. The design scheme of the hulls is combined. At the basement level, it is a wall-column with load-bearing outer walls 300 mm thick, with pilasters with a section of 450 x 500 mm. The pitch of the supporting structures is 2,7 - 3,9 m. The thickness of the internal pylons is 500x800mm and 500x2600mm, the thickness of the walls: intersectional - 300 mm; intrasectional - 160 mm; lift shafts - 200 mm. Above the basement level - a column-wall system with load-bearing pylons with a section of 250 x 500 mm and internal intersection and stairwell walls 160 mm thick and elevator shaft walls 200 mm thick. Ceilings - monolithic reinforced concrete of class B 25 concrete, the ceiling above the basement is assumed to be 160 mm thick, the overlying ceilings are 180 mm thick, the coating slab is 200 mm thick. Elements of stairs - prefabricated reinforced concrete marches and monolithic platforms, in the basement level - prefabricated reinforced concrete steps along steel stringers. The outer walls are designed in two types. The load-bearing external walls are multi-layer, made of monolithic reinforced concrete 160 mm thick, mineral wool insulation 200 mm thick and decorative plaster 30 mm thick. Non-load-bearing external walls - from prefabricated panels with a wooden frame with a layer of plaster on a reinforced mesh. The panels are manufactured by CJSC "LenOblDomStroy" according to the technical specifications agreed upon in the prescribed manner. External wall panels - frame-sheathing. The frame is made of a wooden beam of coniferous species with a section of 43 x 143 mm, with individual elements fastened together with nails. The pitch of the frame racks is 400 mm. Panel sheathing - moisture-resistant gypsum-fiber sheets 12 mm thick (attached to the frame with galvanized brackets), insulation - mineral wool boards with a density of at least 37 kg / m3, 150 mm thick. Additionally, the panel is sheathed on the outside with a reinforced cement-mineral slab 12 mm thick, on the inside - with a plasterboard sheet. The panel is mounted on waterproofing pads, with a cantilevered overhang over the floor slabs (support - 50 mm) and fastened with a step of 1,0 m to the floor slabs of buildings along the bottom and top with HECO screws with a diameter of 10 mm through galvanized corners 50x100x4 mm and 70x100x6 mm with a device gap of 30 mm between the panel and reinforced concrete. The service life of the panels, established by the technical specifications, is 60 years, provided that the installation is carried out in accordance with the project and provided that the maintenance service of the building takes measures for technical maintenance and repair during operation: checks at least once a year of the condition of heating and plumbing fixtures in order to leakage prevention; Periodic visual inspection of the condition of the panel cladding at least once every five years. For wooden panels are presented: certificate of conformity on the panel No. ROSS RU.SL42.N00406 (for compliance with TU 5362-003-96143266-2008); TU 5362-003-96143266-2008. album "Knots of wooden enclosing external wall panels", code 050.10-00-0-KD (developed and approved by CJSC "LenObl-DomStroy"); report on static and dynamic testing of the panel, made by CJSC "LenOblDomStroy" dated 19.08.2010 according to the methodology developed in the "Manual for the design of residential buildings. Issue 3”, confirming the strength of the panels. The spatial rigidity and stability of the hulls is ensured by the joint work of vertical load-bearing elements united by monolithic floor disks. The calculation of load-bearing structures together with the base was carried out using the SCAD 11.3 computer system. For a relative mark of 0,000, the mark of the floor of the first floor is taken, corresponding to absolute marks from 20,450 m to 21,600 m. The foundations are designed on the basis of a technical report based on the results of engineering and geological surveys. F400. Under the foundations, concrete preparation is provided with a thickness of 100 mm. The ground for the base of building 5 is hard, light, silty loam. At the base of the rest of the buildings lie semi-hard clays, with interlayers of hard and light silty, brownish-gray.  The bulk soil lying under part of the base of the hull 7 is to be replaced with sand preparation 300 mm thick with layer-by-layer compaction. The expected design draft of the hulls is 5,0 cm. The maximum groundwater level is expected at the daytime surface of the earth. Groundwater is moderately aggressive in terms of the content of aggressive carbon dioxide in relation to concrete of normal water resistance. The project documentation provides for waterproofing of surfaces in contact with the ground, the use of concrete of a higher water resistance grade. The normative depth of soil freezing is 1,15 - 1,39 m. Basement walls are insulated with polystyrene foam 100 mm thick. The building of the transformer substation is designed from two underground and two above-ground prefabricated reinforced concrete blocks, installed on a monolithic reinforced concrete slab of B20, W6, F50 class concrete, 300 mm thick. Under the slab, a concrete preparation is made of class B7,5 concrete, 100 mm thick, on a cushion of coarse-grained sand, 500 mm thick, with layer-by-layer compaction. At the base there are hard loams, underlain by hard, light, silty dislocated clays. Drainage is provided to protect the buried part. The building of the boiler house is designed in steel structures according to the connection scheme. Frame elements are made of square closed profile pipes and rolled I-beams. The enclosing structures of the walls are hinged sandwich panels 100 mm thick, the covering is made of roofing sandwich panels 150 mm thick. The foundations of the boiler house building are a monolithic reinforced concrete slab made of B30, W8, F50 class concrete, 300 mm thick, on a natural base. Under the slab, a concrete preparation 100 mm thick is provided along a layer of crushed stone rammed into the ground with pouring with bitumen 300 mm thick. The project developed a double-barreled chimney, 20,0 m high. The exhaust shafts are designed from steel pipes with a diameter of 600 mm with external thermal insulation. The supporting structure of the chimney is a three-dimensional structure of the lattice type, 19,35 m high, triangular in plan, with external fastening of the flue pipes with clamps. The design consists of racks united by a spatial lattice. All elements are designed from steel electric-welded pipes. The rigidity and stability of the chimney is ensured by the geometric invariability of the spatial structure and the pinching of the pillars in the foundation. The foundation for the chimney is columnar, made of concrete of class B30, W8, F50, 2,2 m high. Under the foundations, concrete preparation is provided from concrete of class B7,5 with a thickness of 100 mm, along a layer of crushed stone rammed into the ground with pouring with bitumen 300 mm thick. The base of the foundation is semi-hard clay, with interlayers of hard light silty, R = 1,28 kg / cm2.