Architectural and planning solutions

The project for the reconstruction of the existing four-story administrative and production building was completed on the basis of and in accordance with the requirements of the terms of reference approved by the Customer. The existing administrative and production building is a rectangular building with dimensions of 103,9 m x 31 m in plan, with an extension from the courtyard approaching a square with dimensions of 24 m x 18 m. The walls of the building are made of red brick, painted in beige. The constructive scheme of the building is an incomplete frame (Series II-04) with load-bearing outer brick walls. A building with a technical fifth floor (in axes 4-18 / B - E), in which machine rooms for elevators and ventilation chambers are located, and a basement in which a heating center, water supply inlet units, a pumping station and a shelter are located (in axes 8-13 / E- L). The building is equipped with three staircases from the first to the fourth floor, located in the stairwells and providing access directly to the outside through the vestibule, as well as two elevators - cargo (in axes 9-10 / D-E) and passenger (in axes 3-4 / D- D). In axes 12 - 14, a ladder is placed in the shelter. Currently, the building houses various organizations renting premises for various purposes. The roof is flat with internal drainage. The relative mark of the finished floor of the first floor 0.000 corresponds to the absolute mark +11.800. The reconstruction project was developed based on the materials of the engineering survey of the main load-bearing structures of the building. A complete floor-by-floor redevelopment of the existing building and an add-on of the fifth floor are envisaged with the preservation of the functional purpose - an administrative and production building. On the first floor of the building there are production facilities of the service center for the repair, adjustment and maintenance of electronic computers, a cafe for 90 seats. On the second floor there are production facilities for the assembly and adjustment of computers and related production facilities. Office premises are located on the third and fourth floors. On the fifth floor for employees working in the administrative and production building, there are conference rooms, rooms for rest and relaxation. The building is additionally equipped with two passenger elevators, two (internal and external) stairs connecting the first and second production floors with exits directly to the outside. The project for the reconstruction of the administrative and production building was developed in accordance with the town-planning plan of the land plot. The reconstructed building is located on a site located in the territorial subzone TPD1_2, which is intended to accommodate industrial and warehouse facilities, engineering infrastructure of IV and V hazard classes. The maximum height is not more than 54 m, the maximum total area for non-residential facilities is not set. In the solution of facades, a system of "ventilated facades" with active glazing from the side of the street was used, the first floor was accentuated by the use of porcelain stoneware panels. Side facades of the panel - "Aluco-bond", courtyard facades are made using panels of low-profile corrugated board. The use of ventilated facades is due to the following factors: the position of the building, which requires a higher quality of facades than the existing ones, and also from the consideration of warming the contour of the outer walls of the building, since the thickness of the existing brickwork did not provide the necessary heat saving. The interiors of the premises were not decided by this project. The interior of the entrance vestibule was developed according to a separate project. Finishing of premises for both industrial and office purposes was carried out on the newly erected partitions of plasterboard sheets on a metal frame with gluing "Raufazer" followed by painting with water-dispersed compositions. In rooms with a wet regime, partitions are made of ceramic bricks, followed by plastering and painting with waterproof paints. In other rooms with a humid regime - partitions made of moisture-resistant GKBi gypsum boards on a metal frame, followed by ceramic tiling. In the existing auxiliary premises - a heating point, a water metering unit, a shield layer, the layers of plaster are removed, the walls are plastered with a cement-sand mortar, and painted with waterproof paints.

Noise protection measures.

The project uses high-quality imported equipment from leading ventilation companies, which has good noise characteristics. In addition, the following activities were envisaged:
1. Ventilation equipment of supply units is installed in soundproof sections.
2. Supply and exhaust units are installed on the floating floors of ventilation chambers.
3. The air intake shafts are sound-absorbing.
4. The internal walls of the ventilation chambers are soundproofed.
5. Before and after the fans, silencer sections or silencers are installed on the air ducts.
6. Roof fans are installed on noise-absorbing boxes.
7. Fans with air ducts are connected through flexible connectors.
8. Inline fans installed behind a suspended ceiling have a low sound pressure level.
9. The outdoor units of air conditioners installed on the roof have a low sound pressure level.
10. Mounting of ventilation equipment and air ducts to the ceiling is carried out on vibration-isolating hangers.
11. Fastening to siennas is carried out through rubber gaskets.
12. Places of passages through walls and ceilings are vibration-isolated with a mineral wool board or silicone.
13. Openings for air ducts should be 5 cm more air ducts on all sides.
A blind area 900 mm wide is made around the building. 3a, a relative mark of 0,000 is taken as the mark of the finished floor of the first floor, which corresponds to the absolute mark. 11,800. The geological structure of the site is characterized by the following stratification of soils: from an absolute mark of 10,0 - 10,7 m, there is a bulk layer - brick crushed stone, slag - with a thickness of 1,7-2,0 m, abs. elev. soles 8,2 - 9,0 m. Below, post-glacial deposits were discovered; - a) sandy loamy, silty, gray, hard-plastic, layer thickness 0,4 - 0,6 m; - b) loams and clays, silty, ribbon, in places with rare plant remains, semi-solid and hard-plastic consistency to a depth of 3,0 - 4,0 m, to abs. elev. 6,1 -7,5m; - c) loams are silty, layered, with rare gravel, semi-solid, having a local distribution near well No. 8792; Glacial deposits are found everywhere and are represented by sandy loams, silty loams containing gravel-pebble inclusions, nests of light sandy loams, silty in interlayers of silty fine-grained and coarse-grained sands. The consistency of sandy loams and loams is tight-plastic and semi-solid. The total thickness of the layer is 3,4-6,7 m, abs. elev. soles 2,7 m - "minus" - 0,13 m. In the area of ​​the well. Nos. 8790, 8792 and 8793 at depths of 8 - 0 m, intra-moraine silty sandy loam with interlayers of sand, hard-plastic were noted; Their bottom is located at a depth of 10,0 and below 11,0 m. Below the glacial deposits, on most of the site, light, silty intermorainic sandy loams and fine-grained and fine-grained silty sands, dense, saturated with water were discovered. The basis of the existing foundations, according to the working drawings of the LenNIIproekt, are belt silty semi-solid clays and loams, which are under a layer (up to 12,0 meters) of bulk soil. The design soil resistance of the base, for the calculation of foundations, is taken equal to 2, kgf / cm2. Groundwater for the design period was at the daylight surface. The level of groundwater according to the materials of the technical report as of this period is fixed at el. - 2 - 1.4m from the layout.

Brief description of the existing building

Prior to the start of design and construction and installation works for reconstruction, justified, adoption of a design decision and timely introduction of changes to the decisions made, in order to determine the actual settlement of the building and the nature of possible deformations of the base during the operation period, it is necessary to perform a geodetic survey of existing structural marks, analysis of possible uneven settlement adjacent structures of the building and additional inspection of the condition of the nodes of structural elements in the course of work and opening of nodes that are inaccessible during visual inspection. In addition to the materials of the survey, identified defects in building structures during the period of operation of the building, which are subject to elimination before the start of work on the reconstruction of the building, this set contains a brief description of the structural elements used in the design of the existing building. The existing building is T-shaped in plan with dimensions of 24,35x102,32 m in axes A-E / 1-21 and 24,7 x 18,35 m in axes 8-13 / E-L with a height of 2-4 floors - 4.2m, 1st floor -4.8m, with the 5th technical floor in the axes B-E/4-18 (with a height difference and loads along the axes E, B, 4,18), designed using materials of the II- 04-0 issue 1, II-04-12 issue O. In the instructions for the use of products of the II-04-12 series, no. About for buildings with an incomplete frame and brick walls as amended in 1968, frame products are intended for the design and construction of buildings in regions I-IV in terms of snow and wind loads, under unified live loads from 200 kgf / m2 (2.0 kPa). The frame of the building is designed according to the frame-braced scheme for all floors and spans. The frame is a rigid pairing of racks and horizontal beams. In the plane of the main frame frames, horizontal loads are perceived mainly by stiffening diaphragms installed in the plane of individual frames. From the plane of the main frames of the frame, all horizontal forces are perceived with brick d. f. diaphragms only. The limit of application of frame schemes is determined by the bearing capacity of the junction of the crossbar with the column in terms of the perception of the bending moment up to 17,6 tm (176kNm) along the edge of the column. In the project drawings, the frame of the building in the longitudinal direction is designed with frame junctions of columns and crossbars. The coupling of crossbars with brick longitudinal walls along the G axis, acting as brick stiffening diaphragms, with stiffening cores from brick stairwells and elevator shafts, is made rigidly on the 1st - 3rd floors due to the size of the embedding in the wall and pivotally over the 4th and 5th floors along axis 11 with the support of the crossbar on the wall through the well. b. pillow. In the transverse direction, the frames of the frame have an incomplete well. b. frame with support of floor slabs on brick load-bearing external walls along axes A, E, 8,13, as well as with a full frame along digital axes 4-9,12,17,18, creating transverse stiffness from frame-and-braced blocks for external brick walls along the extreme axes A, E, 8,13, The building, according to the design scheme, refers to a rigid structural scheme. The adopted planning and design decisions in the building project were carried out in accordance with the recommendations and instructions of the II-04 series. According to the materials of the II - 04 series, when calculating the frame frames for the mounting schemes of the frames, the vertical design loads from the ceilings were taken into account: a) on the crossbars of ordinary frames at the level of interfloor ceilings - 7,2 t / r.m. and 5,2 t/r.m., including the temporary load, respectively - 3,0 and 1,7 t/r.m. b) on crossbars of ordinary frames at the level of roofing - 5,2 t / m.