Numerical Simulation of Temperature Control and Anti-cracking Measures for the Ming River Aqueduct of the South-to-North Water Diversion Project

The Ming River aqueduct adopts the high-performance C50 concrete with high speed of heat generation and high calorific value.The surface cracks are prone to occur in the thin concrete structures such as the bottom board,side wall,longeron,and crossbeam during the early period of construction,and they may expand and thus form the throughout cracks.In addition,the aqueduct is divided into two layers.When the temperature of the concrete at the upper side walls drops,the throughout cracks may occur caused by the strong constrictions of the bottom concrete.In this paper,the three-dimensional numerical analysis is conducted to obtain the measures and indexes of temperature control for the aqueduct in different months during the construction period,which can provide the feedback for the design and guidance for the construction and thus prevent the formation of cracks in the concrete.Moreover,the results in this paper can be used as references for other similar projects.