Volumetric-spatial solution

The building is designed: II degree of fire resistance; functional fire hazard class - F 4.4; constructive fire hazard class C0; I degree of durability (more than 100 years); building responsibility class – II. For a conditional mark of ±0,000, the mark of the clean floor of the 1st floor was taken. The relative elevation of ±0,000 corresponds to the absolute elevation of +3,55 m. in the Baltic height system. The projected building is 1 ÷ 3 storey without technical attic and basement. The complex planning and volume-spatial solution of the depot building is due to the L-shaped configuration of the site and the restrictions imposed by the territory. The two-height volume of the garage for 2 cars with a repair area and a car wash is oriented to the highway. The three-story part of the building (10,5 m high), which houses working, domestic, administrative, auxiliary and technical premises, is elongated from north to south. The stepped volume of this part of the building is dictated by strict functional requirements for the floor-by-floor arrangement of the main working premises. The vertical dominant of the building is a training tower 15,0 m high, which is also intended for drying fire hoses. The structural scheme of the one-story double-height part of the building is a prefabricated combined frame (prefabricated reinforced concrete columns and metal beams and girders) with a monolithic reinforced concrete coating along the corrugated board. The foundations are prefabricated free-standing with rand beams for the outer walls. Structural scheme of the three-story part of the building - load-bearing longitudinal and transverse brick walls with prefabricated reinforced concrete ceilings and coatings. The foundations are tape prefabricated. The enclosing structures of the entire building as a whole are brick walls with effective insulation and hinged ventilated facades made of porcelain stoneware. The roof is combined flat rolled with an internal drain. The 3-storey volume has a corridor planning scheme with a two-sided arrangement of premises. The building has two evacuation staircases. Corridors are provided with normative natural lighting and smoke removal. On the ground floor of the building there is a garage for 2 cars with a repair area and a car wash and functionally related premises (workshop, pantries of fire extinguishing agents and fire-technical equipment, washing and storage rooms for hoses, washing and drying rooms for overalls, GDZS rooms, control room with a control room, a rest room and a bathroom). In addition, on the ground floor there is an accumulator room, a gym, a thermal chamber with a locker room that has an independent exit to the outside, bathrooms, rooms for cleaning equipment and cleaning equipment, and technical rooms. From the deaf end to the building are attached the premises of the mechanic, the diesel generator set and the compressor room, which have independent entrances from the street. On the second floor of the building there are premises for the shift on duty, consisting of three crews of 6 people (2 on duty and one reserve). The premises of the duty shift include rest rooms and psychological unloading, a classroom, a meal room with a pre-cooking room and an office for the head of the duty shift. In addition, on the floor there is a medical examination room, an office of the head of the unit with a wardrobe, an office of the deputy head of the unit, a meeting room for 50 people, a commandant's office with a storage room for equipment, bathrooms and a room for cleaning equipment. The second floor corridor is connected to the garage by two elevators (metal poles Ø 200 mm). On the third floor there are 4 wardrobes for shifts on duty, a room for storing combat clothes, a shower room with a dressing room, a bathroom and an exhaust ventilation chamber. On the roof of the 2nd floor from the deaf end of the building, it is planned to install a roof boiler. In the volume of the 4th floor of the training tower, a hoist is installed under the roof to raise the sleeves. In the interior decoration of the premises it is supposed to use standard materials that have the appropriate fire and hygiene certificates. Floors in the garage and workshop - concrete with dust-removing coating, in lobbies, corridors - porcelain stoneware, in wet and technical rooms - ceramic tiles, in administrative and amenity rooms - homogeneous linoleum, in working rooms - antistatic linoleum, in the gym - special sports floor coating. Walls on evacuation routes, in working, domestic and administrative premises - plaster with subsequent painting with moisture-resistant PVA, in wet rooms - ceramic tiles, in technical rooms - finishing for painting and painting with moisture-resistant PVA. Ceilings on evacuation routes, in working, amenity and administrative premises - suspended modular type "Armstrong", in other premises - finishing for painting and painting with moisture-resistant PVA. The exterior finish of the building is a hinged ventilated facade with porcelain stoneware cladding. Plinth cladding - porcelain stoneware in anti-vandal design.

Constructive decisions

Due to the fact that this building is in terms of a building with dimensions of 57,9x30,0 m, consisting of different-storey (1 ... 4 floors) parts of various functional purposes, made of various materials, the project provides for its division into temperature-shrinkable blocks . At the same time, this division is made on the basis of the functional and space-planning features of the building and includes two blocks separated by a temperature-shrinkage joint between axes "3" and "4". The maximum length of the temperature-shrinkable block is 42,1m in axes. The constructive scheme of the building in the axes "1" ... "3" is adopted in the form of a frame in which steel roofing beams rest on prefabricated reinforced concrete columns. This decision was made in order to reduce the load on the roof of the building, as well as based on the absence in the range of prefabricated reinforced concrete structures of roof slabs other than 6,0 m in length. The pitch of the columns is 6,0; 5,4 and 4,2m, the span is 9,0 and 6,0m. The rigidity of the temperature-shrinkable block in the axes "1" ... "3" is provided by: in the vertical plane by the presence of columns pinched into glass-type foundations; in the horizontal plane by the presence in the level of the coating of a disk made of profiled flooring and secondary coating beams connected to the main beams and columns and transferring vertical and horizontal loads to them. The constructive scheme of the building in the axes "1" ... "3" is adopted in the form of stone walls installed with a step of 6,0 m, on which multi-hollow floor slabs are supported. The rigidity of the temperature-shrinkable block in the axes "4" ... "13" is provided by: in the vertical plane by the presence of stone longitudinal and transverse walls 380 mm thick, while the maximum step of the transverse walls is no more than 18,0 m; in the horizontal plane by the presence of a disk of prefabricated multi-hollow floor slabs that transfer vertical and horizontal loads to the walls. Due to the fact that the adopted design solutions and the applied designs for temperature-shrinkable blocks differ from each other, the description of the structures is given for each block separately.

Structures of the temperature-shrinkage block in the axes "1" ... "3"

Foundations

The foundations are designed glass type on a natural basis according to the series 1.020.1/87 issue. 1-1 dimensions in terms of 1,5x1,5m and 1,2x1,2m. At the same time, in order to ensure uniform settlement of the building and its parts, foundations are taken under the columns in terms of dimensions of 1,5x1,5 m, with the exception of the foundation along the “1” / “D” axis, for which, due to the insignificant load transmitted from the column and wall, the foundation was adopted with dimensions in terms of 1,2x1,2m. Due to the fact that the total height of the foundation is 0,9 m, in order to ensure the landing of the foundation sole on the soils of the EGE-2 layer and ensure the required freezing depth, a single absolute mark of the foundation sole with a temperature-shrinkage block in the axes "4" ... "13" is adopted , which is 1,73m. To ensure this landing in height, a concrete preparation is arranged under the foundations from concrete of class B7,5 with a height of 0,5 m.

Колонны

The columns are prefabricated reinforced concrete according to the series 1.423.1-3/88 issue 1 with a length of 6,9 m and 3,8 m. To ensure the stability of a stone wall 250 mm thick, the columns are provided with embedded parts to ensure the anchoring of the masonry, as well as embedded parts for installing steel roofing beams.

Steel Structure Coating

Steel roof beams are made of hot-rolled steel I-beams with parallel edges of the shelves according to STO ASChM 20-93 with a section according to the calculation. The material of the beams is C245 steel according to GOST 27772-88*. The pavement beams are connected in one level for pavement at elev. +6,39 and in two levels for overlapping at el. +3,08, which is related to the architectural features of the block. The support of the beams is carried out according to the standard units of the 2.440-2 series, issue. 1. The flooring is made of cold-formed sheet profiles with a trapezoidal corrugation according to GOST 24045-94 with a section according to the calculation. The flooring material is C235 steel according to GOST 27772-88*. Steel structures are to be painted 2 times with PF-115 enamel after priming GF-020.

Structures of the temperature-shrinkage block in the axes "4" ... "13"

Foundations

The foundations are designed as strip foundations on a natural foundation from foundation slabs in accordance with GOST 13580-85. At the same time, for sections of walls with different loads, foundation slabs of various widths are adopted. To plant the foundation sole on the soils of the EGE-2 layer and ensure the required freezing depth, a single absolute mark of the foundation sole with a temperature-shrinkage block in the axes "1" ... "3" is taken, which is 1,73 m. To ensure this fit, basement wall blocks are installed on the foundation slabs in accordance with GOST 13579-78 with a total height of 1,5 m. Blocks of basement walls are installed on cement mortar grade 100 with dressing of seams along the length and in the corners of the block. On top of the foundations, waterproofing is arranged from two layers of waterproofing.

Floors and coatings

Floors and coverings are taken from hollow-core slabs from the catalog. The main span of the slabs is 6,0 m. To ensure layout with a minimum number of monolithic sections, slabs with a width of 1,0 are used; 1,2 and 1,5m. At the same time, monolithic sections are arranged in the places of passage of engineering communications, for which one of the dimensions exceeds 150 mm (holes up to 150 mm are punched in place within the void of the slabs, without violating the integrity of the ribs of the slabs), as well as to support the structures of the stairs m / o "7" / "8" (see below). Since the load on the slabs, taking into account a significant amount of snow "bags", is 1000 kg/m2 (without taking into account the own weight of the slabs), in order to avoid incorrect installation of the slabs during installation and reduce the range of products used, the project provides for the installation of slabs under the design load of 1000 kg/m2. In places where openings are made to support floor slabs, additional installation of prefabricated reinforced concrete girders according to series 1.225-2, issue 12 (for openings up to 3,2 m) and according to the series 1.225.1-3 (for openings of greater width).

Stair flights and landings

Stairs m / o "5" / "6" and "9" / "10" are made fully assembled, while flights of stairs are made according to series 1.251.1-4, landings - according to series 1.252.1-4. The staircase m / o "7" / "8" due to technological features (the presence of a gallery for drying fire hoses) is made of separate reinforced concrete steps according to GOST 8717-81 according to stringers. Stringers are made of a hot-rolled steel channel according to GOST 8240-97 with a section according to the calculation, supported by a stone wall and a steel profile of a monolithic floor section. The material of the stringers is C245 steel according to GOST 27772-88*. Intermediate landings are made of monolithic reinforced concrete 80mm high. Steel structures are to be coated with cement laitance, followed by plastering on a grid with a 20 mm thick mesh.