Overview

The degree of responsibility of the object is normal. The year of putting the object into operation - 1976. A series of a standard project: VI-44. The constructive type of the object is prefabricated reinforced concrete and concrete structures of a factory product. The shape of the object in plan - the building has a W-shape in plan with dimensions of 73,74x36.67 m. Scheme of the object - a constructive scheme of the existing building - with load-bearing transverse walls made of concrete blocks with additional brickwork. In the central part of the building in the axes 6'-8 / V-Zh, the scheme of the building is a prefabricated reinforced concrete frame of prefabricated columns and crossbars with hinged support of the crossbars on the columns (vertical load-bearing elements - prefabricated concrete blocks and reinforced concrete columns that take the load from beams, ceilings and coatings, and transferring it to the foundations). Longitudinal outer walls are self-supporting expanded clay concrete panels. The building is divided into three temperature-shrinkage blocks. The temperature-shrinkage seams provided along axes 2 and 13 also perform the role of deformation. The year of development of the project of the object is the beginning of the 70s of the XX century. The presence of a basement, underground floors: basement technical floor. Object height configuration - the building has a multi-level configuration in which the central part is a one-story building, which in turn connects three wings of two-story buildings. Object height (height of floors): ground - 3 m; basement - 1,9-2,7 m. The height of the building is 7,885 m. Object length: 73,74 m. Width of the object: 36,67 m. Construction volume of the object: 9786 cubic meters. Bearing structures: transverse load-bearing wall concrete blocks and precast concrete columns. Walls: prefabricated concrete wall blocks according to GOST 19010 and brick walls of stairwells. Frame - prefabricated reinforced concrete columns with a section of 400x400mm in the central part of the building. The floor structure is prefabricated reinforced concrete multi-hollow slabs supported by prefabricated concrete wall blocks and crossbars. There are additional sections from a monolithic ceiling. The roof structure is rolled, with foam glass insulation and expanded clay gravel backfill. The supporting structures of the coating are prefabricated reinforced concrete multi-hollow slabs based on prefabricated concrete blocks and crossbars. The covering is combined with the roof. Wall barriers - the enclosing structures are self-supporting expanded clay concrete panels 400 mm thick, the supporting structures are concrete wall blocks. Partitions - brick. Foundations - strip foundations under load-bearing and self-supporting walls, and columnar glasses under columns. Category of the technical condition of the object: limited working condition.

Constructive decisions

load-bearing structures of the building. The superstructure of the second floor above the one-story part of the building in axes 2-11, B-E using a metal frame frame made of racks, beams and vertical and horizontal braces. The load from the steel columns is transferred to the monolithic belt along the wall panels and internal load-bearing walls. The coating is carried out on a steel profiled sheet. In the gym in axes 6-7, I-L, a part of the bearing wall is dismantled along the K axis with re-supporting the coating of concrete slabs on metal beams. The beams transfer the load to the metal studs with their newly developed foundations. Racks and beams cover form a rigid frame.

Designs of entrance groups and stairs. Four attached external evacuation ladders in axes 1-2, L; 1-2, A; 11-12, L; 11-12,A are made of metal structures. The frames of the stairs transfer the load to the designed reinforced concrete slab foundations. The new attached staircase in axes 6-7, Г-Б' is made of prefabricated monolithic on steel stringers with monolithic platforms and prefabricated steps. Stair railing - monolithic reinforced concrete wall with reinforced concrete slab foundation. On the second floor, in the axes 6'-6”, D-E, a part of the floor is dismantled with the support of new sections of the floor on metal beams. The beams transfer the load to the existing reinforced concrete girders.

 Space-planning solutions. The existing pool and part of the floor of the technical underground in axes 6-7, K-L are replaced with a monolithic reinforced concrete pool bowl and the floor area adjacent to it. The load is transferred to the designed reinforced concrete slab foundation from the monolithic reinforced concrete walls under the pool bowl. In axes 2-3, G; 10-11, D monolithic reinforced concrete walls are provided. From the walls, the load is transferred to the strip reinforced concrete foundations. The overall geometric immutability, stability and rigidity of the building as a whole is ensured by the rigidity of the nodes and due to the interfaces of existing structures with those being designed.

 Restoration and strengthening of existing structures

Underground part. The walls of the technical underground and the floor slab affected by the fungus should be cleaned of fungal infections, dried with a building hair dryer and treated with antifungal compounds; Perform jointing of cracks; In places of destruction and weakening of the masonry mortar, clean the seams and fill the seams with cement-sand mortar with cutting; In the lintels in the openings of the technical underground in places where the reinforcement is exposed, perform plastering. Cleaning and repair of the plaster layer; Perform replacement of the basement floor, as well as thermal and waterproofing of the basement floor and walls.

Walls. Fill joints between wall panels with polymer mastic; Clean the walls affected by the fungus from fungal infections, dry with a building hair dryer and treat with antifungal compounds; Cleaning and repair of the plaster layer; Insulation of external walls and facade structure, see KR3

For overlapping over the technical underground and the 1st floor: Clean the floors affected by moisture from lesions, dry with a building hair dryer and treat with antifungal compounds; Fill cracks and potholes; In places of delamination of the protective layer of reinforcement, perform plastering. 

For covering and roofing: Perform a complete dismantling of the roofing; Clean the floors affected by moisture from lesions, dry with a building hair dryer and treat with antifungal compounds; Fill cracks and potholes; Perform a new roof covering, according to section KP3. Perform roof fencing, according to section KP3. Reinforce openings in the ceiling with 20P channels.

Ladders. Repair cracks and potholes in stairs. Dismantle all external stairs and entrance groups. Execute new, according to the project.

Second floor extension. It is necessary to carry out the superstructure of the second floor of the building in the axes B-E / 2-5 and B-E / -8-11. The second floor is made of metal structures - columns and beams of an I-section. The columns rest on the existing load-bearing walls of the 1st floor. Expansion joints are provided between the retained parts of the building and the newly erected part in the axes B-M/5-9.