Cause Analysis of Cracks in Concrete Panels during Operation Period of Pumped Storage Power Station in the Cold Area and Corresponding Treatment

Abstract

Cracks tend to appear on the concrete panels of pumped storage power stations during operation with frequent changes in water level in cold regions in winter. The number of cracks increases gradually with time, which adversely affects the seepage resistance and durability of the panels. This paper conducts calculation and analysis of the temperature stress of the concrete panel during winter operation, by taking the Shisanling Pumped Storage Power Station as an example, taking full consideration of the external climatic conditions of the reinforced concrete panel operation and the operating conditions of the power station, thus obtaining the variation law and distribution characteristics of temperature stress of concrete panels. According to the above calculation and the test result of concrete panel cracks, it is considered that the temperature stress during winter operation is the main reason for the generation and development of cracks on the concrete panel. In order to ensure the long-term safe operation of the reinforced concrete panel of the upper reservoir, this paper selects SK cracked polyurea to treat the concrete cracks, which delivers good result and achieves the intended purpose of the crack treatment, thus ensuring its long-term safe operation.