ASSESSMENT OF TECHNICAL STATE OF UNFINISHED STRUCTURES OF THE DNISTROVSKA PSP

Abstract

The paper considers the results of the research of civil structures reliability and safety of the Dnistrovska PSP hydraulic structures (HS). The considerable attention is paid to the reliability issues in the world. The reliability and safety of hydraulic structures must be ensured during their operation, as well as during their repair, reconstruction, maintenance and their liquidation. The HS are widely used in the various areas of the economy. Therefore, an important task of the Ukrainian hydropower industry is to ensure the safety and reliability of these structures. The HS operation features that require to be considered in the design, construction and operation are presented, and a brief description of the Dnistrovska PSP hydraulic structures is given. The NIISK State Enterprise experts commissioned by the PJSC "Ukrhydroproekt" performed a visual and instrumental survey (by destructive and nondestructive methods) of the reinforced concrete structures of the fixture of the water intakes and water outlets flow-through part for hydraulic units 5 and 7 and the reinforced concrete areas of the penstock conduits 5 and 6 of the Dnistrovska PSP, as well as conducted an instrumental survey of bored piles of the upper structure of the PSP building and the technological building within hydraulic units 5-7 and based on the survey results prepared their technical condition assessment. The concrete
carbonation depth was determined in all surveyed areas. The concrete strength determination was carried out with core drilling in laboratory conditions at the NIISK State Eenterprise. It is shown that the regulatory criteria for safety and technical conditions of hydraulic structures being in operation are outdated and therefore it is necessary to develop a standard (DBN) to regulate the principles of determining the criteria of safety, reliability and technical conditions of
hydraulic structures. To ensure the hydraulic structures reliability and safety and legal regulation of relations, it is necessary to complete the draft  development as soon as possible and adopt the law of Ukraine "On the Hydraulic Structures Safety".