Assessment of the technical condition of bridge crossings on the main canals of irrigation systems

Currently, it is necessary to assess competently and timely the technical condition of long-operated bridge crossings on the main canals of irrigation systems with increasing loads. The article considers structures with various defects and damages by the example of the Abinsky irrigation system of the Lower Kuban, examines the history of the issue of assessing the remaining resource of bridge structures. It includes the values of coefficients of significance of bridge crossing structures on the main canals of irrigation systems obtained by the authors based on the results of calculation. When designing irrigation systems, the estimated service life was no more than thirty years. Currently, on average, more than fifty years have already passed since the commissioning of the main irrigation systems, for example, in Krasnodar Territory. At the moment, the determination of the true value of the remaining resource is massively in demand not only in the construction field and hydraulic engineering, but also in many other branches of industrial production. For more effective control over the technical condition of bridge crossings on the main canals of irrigation systems, scientific and practical interest is primarily not only an understanding of the actual condition of the structure at the time of the survey, but also its alternative change, i.e. the forecast of its remaining resource. Assessment of the technical condition of the bridge crossing structures on the main canal is determining the possibility of their further long-term operation, the need for strengthening, reconstruction of bridge crossings on the main canals of irrigation systems.