The article presents a survey and a technical solution for strengthening precast reinforced concrete ribbed coating slabs. Due to the destruction of the roofing material, precipitation freely penetrated into the interior of the building, and the coating plates were soaked for a long time. The constant soaking of the coating plates caused the development of corrosion processes in the working and structural fittings, destruction and detachment of the protective layer of concrete. The weighting of the roof composition led to the appearance of inclined cracks in the longitudinal ribs of individual slabs. The analysis of the defects in the plates showed that some plates are not able to perceive the actual values of loads. Their condition is assessed as emergency, these plates require reinforcement. Subject of research: prefabricated reinforced concrete ribbed coating plates. Materials and methods: The materials for this article were obtained during the survey of precast reinforced concrete ribbed slabs covering the production building of ROSSNAB LLC. The general parameters of the plates and visible defects were determined by visual inspection. During the instrumental examination, autopsies and measurements of the coating plates were performed, the strength and deformative parameters of the structures were determined. Results: According to the results of the study, data were obtained to assess the technical condition of precast reinforced concrete ribbed coating slabs. Lists of defects and damages have been compiled with a description of the set parameters and their values. Some plates are not able to perceive the actual values of the loads. Their condition is assessed as emergency, these plates require reinforcement. Conclusions: In view of the current emergency situation and to prevent the development of subsequent deformations, resulting in destruction, an engineering solution was prepared to strengthen the coating plates. The recommended composition of repair and restoration work and reinforcement provides for the possibility of further safe operation of the production building of ROSSNAB LLC.
reinforcement, plates, accident, collapse, concrete, inspection, defects
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