Research on temperature control of special-shaped and high strength mass concrete in construction

Abstract

Based on the construction of V-shaped rigid pier of cross-railway viaduct, the temperature control measures of high-strength special-shaped mass concrete were studied. The finite element models of the pier and the two sections of the inclined leg were established respectively. The characteristics of the temperature peak with age and the internal temperature field under different cooling measures were analyzed. The result of temperature monitoring and simulation were compared. The result show that the key parameters of temperature control are different in different sections. The peak temperature of the pier is the maximum temperature difference between the surface and the inside of the inclined leg, which is the peak temperature for pier and the maximum temperature difference between surface and inside for inclined leg. The crack resistance of high strength mass concrete is improved, the peak temperature and the maximum temperature difference between the surface and the inside are increased by 5 ℃ compared with the existing specifications, and the temperature difference between the surface and the atmosphere can be increased by 10 ℃.

Keywords

V-shaped rigid frame pier / mass concrete / temperature field / in-situ monitoring