TECHNICAL INSPECTION OF BUILDING STRUCTURES OF A FOUR-STORY BUILDING IN CONNECTION WITH RECONSTRUCTION AND RE-PROFILING FOR A HOTEL COMPLEX

Аннотация

INTRODUCTION Reconstruction of buildings and structures at the present stage, regardless of economic, social and political views, has become one of the main directions in the field of capital construction. Its volumes are steadily increasing. Due to its specificity, the design and implementation of construction and installation works, reconstruction differs significantly from the process of creating new buildings and structures and determines some other approaches and views [1]. Reconstruction of buildings and structures is their reconstruction, technical improvement with the aim of partially or completely changing the functional purpose, installing new effective equipment, improving the development of territories, and bringing them in accordance with modern increased regulatory requirements. It is part of the general reconstruction of the industrial complex, urban areas, residential areas, and a complex of social, cultural and mass institutions. The need to reconstruct any buildings and structures requires solving issues of the operability of existing structures, elements and products, identifying reserves in them for increasing loads or, conversely, defects that reduce the likelihood of their https://www.theamericanjournals.com/index.php/tajet 23 THE USA JOURNALS THE AMERICAN JOURNAL OF ENGINEERING AND TECHNOLOGY (ISSN – 2689-0984) VOLUME 06 ISSUE05 trouble-free operation. In this process, the issue of operational suitability and seismic resistance should be resolved as a result of analysis and processing of the data obtained, if the object in question is located in a seismic area (score 7 or more). Reconstruction of buildings and structures of a production enterprise is carried out mainly during technical re-equipment, but in this case the costs of construction and installation work should not exceed 10% of the total capital investment. It must be comprehensive and take into account the long-term development of the area where the facility is located. Incompetence of the approach, satisfaction of interests only of the present time, lack of a long-term plan can lead, after a certain time, to the impossibility of carrying out subsequent reconstruction without demolishing the existing buildings after the reconstruction [2]. Main part. Location object and his brief description. The building is located in the Tashkent region, city Yangiyul, MSG "Navruz" st. Nizami, house 16. On moment examinations building partially operated. Characteristic district subject object: • standard snow load So=0.5 kPa (50 kgf/) (KMK 2.01.07-96 [3]); • normative express pressure wind Wo =0.38 kPa (38 kgf/m) [KMK 2.01.07-96]; • seismicity district 8 points [map MSR suburbs Tashkent]; • co-factor repeatability earthquakes Kp =1.2 (KMK 2.01.03-96 [4]); • standard soil freezing depth is 0.7 m [according to geotechnical surveys]; • soils grounds – loams loess-like [on basis opening of foundations and engineering-geological surveys]; • category soil By seismic properties – III (KMK 2.01.03-96 [4]); • type ground conditions by subsidence – second [by data from engineering and geological surveys]; • groundwater lies at a depth of more than 11.5-11.6 m from the surface land [according to engineering-geological surveys]. Figure 1 - Exterior view of the building Figure 2 - Interior view of the building https://www.theamericanjournals.com/index.php/tajet 24 THE USA JOURNALS THE AMERICAN JOURNAL OF ENGINEERING AND TECHNOLOGY (ISSN – 2689-0984) VOLUME 06 ISSUE05 crossbars in the transverse direction are of T- Architectural and planning and constructive section; in the longitudinal direction, the crossbars description object are made in the form of trough-shaped tie beams. Responsibility class of the building – II, reliability The cross-section of the load-bearing prefabricated coefficient for the intended purpose Up=1.0 (KMK reinforced concrete crossbars is 640x800(h)mm. 2.01.07-96, [1, p. 125]), category of responsibility The cross-section of the prefabricated reinforced of the building – I, liability coefficient K o =1.0 [2, concrete middle beams is 1550x400(h)mm. The (Change 1, Table 2.3.)], The degree of fire cross-section of the outer tie beams is 800x400mm. resistance of buildings is II. The floors and covering are made of ribbed slabs Complex buildings consist of from several 400mm high, 1500mm wide according to the IIS buildings on one site. 24-2-73 series. Subject building - block "B". The external wall fencing is made of hinged Block B - four-story building, sizes B plan prefabricated expanded clay concrete wall panels 71.2x24.0m. B axes "1-14/A-D." according to the IIS 29-5 series. In axes "7-8" divided by an expansion joint into The internal walls and partitions are made of structurally independent compartments. ordinary solid brick. Heights floors: Constructive solutions for pairing frame elements have been completed by series TDSM 22-1, TDSM height of the 1st floor – 4.8 mm (from the floor level 24-1, TDSM 25-1, TDSM 24-2, TDSM 25-2