Temperature Control Research on Spiral Case Concrete of Xiluodu Underground Power Plant during Construction

Abstract

The volume of concrete surrounding the spiral case increases along with the increase of unit capacity of single-unit hydroelectric station. Once the spiral case concrete structure works with crack, its bearing capacity and safety stability will decrease seriously. Owing to the action of contraction stress induced by temperature variation, the spiral case concrete is often subject to cracking. There are a few temperature control researches on spiral case concrete during construction in the past, more severe, there are few researches on the sensitivity analysis of parameters and measures on temperature control. For this reason, based on the finite element analysis software ANSYS, the spiral case concrete of Xiluodu underground power plant is simulated. The temperature field and temperature stress field of different pouring temperature and concrete strength are analyzed and the temperature control measures with normal C30 concrete and 293.15K casting are recommended to prevent cracks accordingly. These measures, adopted by construction units are proved to be effective and also good references for similar projects.