Architectural and space-planning solutions

Residential apartment building - a 9-storey detached 2-section building with a technical basement, an underground built-in-attached parking lot and built-in premises. The building is of complex configuration in plan, with a rounded corner, completed with a glazed segment of the dome. The height of the building from the ground level to the cornice is 28 m, to the ridge - 33 m. 66 kg) leading to both sections of the building. On the 1000st floor there are technical premises, an electrical panel room, vestibules of the residential part of the building, concierge premises, built-in premises (1 offices designed with a free layout and with separate entrances from the street facade of the building). From the 4nd to the 2th - residential floors. All apartments are designed with access to balconies or loggias, planning solutions provide for functional zoning of apartments and the possibility of combining living rooms with kitchens. The basement part of the building (stylobate) is designed with an inverted exploitable roof. Exterior finish of the stylobate and the first floor - with natural stone, above the 9st floor - decorative plaster with stone chips. Roof - flat combined with a covering. The sloping part of the roof of the 1th floor, designed as an attic floor, is semicircular metal. The drain is internal. Windows - metal-plastic, with double vacuum glass (triple glazing), with micro-ventilation and noise dampers. Stained glass glazing of living rooms - metal-plastic double-glazed windows, stained glass glazing of staircases - single-chamber double-glazed windows. Entrance doors to office premises - aluminum stained glass, to residential sections - metal insulated. The project has developed measures to ensure the accessibility of the building, including offices, for persons with disabilities and MGNs, conditions for unhindered movement inside buildings and safety of the traffic path are provided. Planning decisions provide for the possibility of living in the house of persons from among the MGN. Stair and lift halls are designed with the possibility of transporting stretchers and wheelchairs for the disabled.

Structural and space-planning solutions

The project provides for the demolition of a section of a one-story garage-workshop building that falls under the development spot, and the construction of a residential building and an underground parking lot. The level of responsibility of the building is II, normal. The residential building and the one-story underground car park are designed in monolithic reinforced concrete on a single pile foundation. The structural system of the building is column-wall, with irregular spacing of walls and columns from 3,3 m to 7,5 m, at the level of the parking lot - with load-bearing outer walls 200 mm thick. The columns are taken with a section of 400 x 400 mm, 500 x 300 mm, 550 x 400 mm, 600 x 200 mm, 600 x 300 mm, 720 x 200 mm, 1000 x 200 mm, 1400 x 200 mm. Internal and external walls are assumed to be 200 mm thick, elevator shaft walls - 160 mm thick. The roof slab above the attached part of the one-storey underground car park is designed to be 300 mm thick. Floor slab above the built-in part of the car park - 230 mm thick, floor slabs of standard floors and roofing - 200 mm thick. The structures of the stairs are monolithic reinforced concrete. The material of monolithic structures of the parking lot is concrete of class B30, F150, W8; up to the floor level of the second floor - class B30 concrete; above - class B25 concrete; fittings of class A400, A240. The truss structures of the attic are designed from steel square pipes, the pitch of the rafters is 1,0÷2,0 m. The rigidity of the coating is ensured by the frequent fastening of the steel profiled flooring to the rafters with self-tapping bolts and the connection of the flooring sheets to each other with combined rivets. External non-bearing walls - multi-layer, floor-by-floor cut with support on floors, made of hollow brick M100, F50, 250 mm thick. External load-bearing walls - from monolithic reinforced concrete 200 mm thick. The insulation of all external walls is provided with mineral wool slabs 150 mm thick, the cladding at the level of the basement is provided with natural stone (or porcelain stoneware), above - plaster over the grid. The connection of the layers and fastening to the supporting frame is carried out by flexible connections with an anti-corrosion coating. The spatial rigidity and stability of the building is ensured by the joint work of vertical load-bearing structures, united by hard disks of interfloor floors and roofing. The calculation of building structures was performed using the SCAD 11.1 computer system. The main load-bearing structures of the building are designed taking into account the fire resistance requirements in accordance with STO 36554501-006-2006 and in accordance with the calculations for progressive destruction according to SP 52-103-2007. The structure of the parking lot is calculated taking into account the load from the fire engine. The relative mark of 0.000 corresponds to the absolute mark of 4.200. The foundations were designed on the basis of a technical report on engineering and geological surveys carried out at the construction site. At the construction site, a pile field was partially completed according to the project. Some of the existing piles (124 pieces) are used in foundation structures, the rest are cut down 400 mm below the reinforced concrete structures and excluded from work. The foundations of the building are piled. Piles - driven with a section of 350 x 350 mm, 22 m long, immersed by the static indentation method. The connection between piles and grillage is rigid. The basis of the tip of the piles are light silty gray loams with gravel, hard-plastic pebbles (E=120kg/cm2, IL=0,34, e=0,622). The allowable design load on the pile, equal to 125 tons, was adopted based on the results of soil testing by driven piles with a vertical static indentation load. The expected design settlement of the building is 2,0 cm. The pile bushes are combined into grillages 800 mm high. Between the grillages and under the walls of the 1-storey part, a monolithic reinforced concrete grillage slab 500 mm thick is made. The material of the piles is concrete of class B25, F100, W4, the grillage is concrete of class B30, F150, W8; fittings of class A400, A240. Under the grillage, concrete preparation is provided from concrete of class B7,5, 50 mm thick and sand preparation 100 mm thick. The maximum position of the groundwater level is expected at a depth of 0,8 - 1,0 m. Groundwater is non-aggressive towards concrete of normal permeability. The project provides for the use of concrete grade W8 for water resistance, waterproofing of surfaces in contact with the ground. The normative depth of soil freezing is 1,45 m. The construction of the building is provided for in two technological stages. In the first stage, a multi-storey part of the building is being erected. In 2009, a survey was made of residential buildings in the surrounding area that fall within the 30-meter risk zone. Carried out a survey of the building of the garage-workshop house No. 2/20, lit.V. Structural schemes of buildings - wall. The foundations of buildings are prefabricated or stone. The walls are made of clay bricks on a cement-lime mortar. Ceilings - from prefabricated reinforced concrete multi-hollow slabs. Previously, construction work was carried out on the site of the projected construction. Due to the influence of construction, house No. 2/20 letter B received an additional draft. The result of the sediment was damage to the load-bearing brick walls of the building. House No. 2/20, letter B is closely adjacent to the site of new construction with an end wall. The building is assigned to category III of the technical condition of structures. The remaining buildings are assigned to category II of the technical condition of structures. A geotechnical justification for the construction was carried out. Based on the conclusions of the survey of building No. 2/20 letter B, as well as on the results of monitoring the settlement of the building, constructive solutions were developed aimed at strengthening the load-bearing structures of the building, imparting additional rigidity, and reducing the rate of ongoing settlement. The project for strengthening the foundations provides for the implementation of deep soil injections in two horizons, the installation of a stiffening belt at the level of the first foundation block and the installation of a system of strands at the level of the attic floor and the floor of the fourth floor. After the above measures, the arrangement of strands at the level of floors of 1-3 floors is provided. After the completion of construction, it is planned to carry out injections of brickwork and fix cracks with reinforcing brackets. After the activities carried out as part of the reinforcement project, the building can be classified as category II of the technical condition of the structures. Parallel to the end wall of house No. 2/20 lit. B, at a distance of 1,65 m, a sheet piling of steel sheet piling of the Larsen-4 profile, 12 m long, was previously installed. Most tongue and groove links do not have locks and are pressed in with a small gap. Before excavation of the excavation pit, this project provides for the sealing of the existing sheet piling by the injection of grouting slurries. According to the examination of the bearing capacity of the sheet piling is not enough, the calculated deformations exceed the maximum allowable. The project provides for the fastening of sheet piling with temporary supports made of metal pipes Ø325 x 8 mm, bursting into a foundation slab at the time of work, and then with structures of an underground parking lot during operation.

Organization of construction

Construction is supposed to be carried out with the use of complex mechanization of construction and installation works. The total duration of the reconstruction is -16 months, including the preparatory period -1 month. The maximum number of employees is 74 people. Labor costs for construction and installation works are 26048,0 man-days. The POS complies with current regulatory requirements.