Design and Experimental Studies of Strengthening of Backwater Type Hydraulic Structures with Composite Materials

During long-term operation of hydraulic structures of sluices, retaining walls, abutments, there are non-design settlements, tilts, displacements, opening of inter-block construction joints, corrosion of working reinforcement, change in strength characteristics of concrete, which leads to a decrease in operational properties and bearing capacity. The analysis of scientific and technical documentation is presented, the results of surveys are analysed, a spatial mathematical model based on the finite element method is developed. The computational research of the stress-strain state of sluices is carried out, including taking into account the reinforcement with prestressed basalt-composite reinforcement. The scheme of reinforcement of sluice walls has been justified by calculation. In experimental researches the complex problem on definition of strength, deflections, width of opening of inter-block construction joints, deformations of steel and prestressed basalt-composite reinforcement of reinforced concrete structures including those exposed to water environment was solved. The conducted design and experimental studies substantiate the use of prestressed basalt-composite reinforcement as an effective method of reinforcement of retaining structures, increasing their load-bearing capacity and maintaining deflections, width of opening of interlock construction joints, deformations of steel and prestressed basalt-composite reinforcement within the limits allowed by normative documents.