The study object is a prototype of a composite bridge prestressed concrete beam with a length of 42.0 m for road bridge desks for perception of impact from motor vehicles in the form of A14, NK-120 and NK-180 loads.
The experimental deflection of the beam in the midspan had a value equal to fexp = 62.4 mm at a load of 2Pк = 436 kN, which was 75.2% of the control deflection value.
Based on the test results, the girder block joints with "tooth" and "notch" device are found to be imperfect.
The experimental load of 2PMAX = 822.7 kN was achieved during the tests, which exceeded the control load equal to 2Pк = 744 kN when checking the strength of the composite beam and the control load equal to 2Pк = 790 kN when checking the strength of No. 1 and No. 2 joints.
The paper presents the results of a test on a composite bridge girder of a length of 42.0 m, which was performed to assess its resistance, stiffness and crack resistance. Composite reinforced concrete beam with three blocks is joined by the two monolithic joints. When testing a beam with monolithic joint in terms of stiffness, crack resistance and strength, a load of 943.5 kN was achieved without cracking, which is 26.8 % higher than the required one.
The 33.0 m long reinforced concrete bridge beams of the overpass superstructure after vehicular impacts were taken as a research object. The overpass consists of 14 beams, six of which were repaired by restoring the widened lower part with EMACO FAST TIXO, manufactured by BASF. The remaining 8 beams were completely dismantled and replaced with new ones. The new beams have been fully tested for the perception of vehicular loads. The fully reconstructed span structure showed compliance with the design loads of A14, NK-120 and NK-180 based on test results.
Greening of industrial areas with the use of tree species and shrubs resistant to chemical pollution can reduce dangerous concentrations of dust and gas, reduces the negative physical impact of noise, vibration, electromagnetic fields around the facility on the surrounding area. The extent of damage to green areas by industrial emissions indicates that the pollution of the territory of the facility is becoming increasingly limiting for the environment. The most powerful sources of phytotoxic pollutant emissions are oil production and refining enterprises. The article is devoted to the problem of greening the territory of LLP "Sazankurak" of Atyrau region. One of the main pollutants at the enterprise is inorganic dust. The concentration and duration of exposure to dust depends on the wind rose, topography and location of emission sources. Based on a comprehensive analysis of the operating mode of the enterprise taking into account local climatic conditions, recommendations for establishing sustainable plantings in the sanitary protection zone have been developed. The features of biological sorption of pollutants and the formation of anthropogenic anomalies in the territory of industrial facilities have been studied. The characteristic of species and individual stability of the main species of trees and shrubs of Western Kazakhstan is given. The system of measures for landscaping areas in the crude oil production field "Sazankurak" was substantiated.
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