Study On Simulation Of Concrete Crack Control Of Soleplate In Sancha River Of QinHuai River In NanJing

It has been proved by research about micro research of concrete strength and a great deal of engineering experience in modern science that cracks in hydraulic structures is inevitable due to their special configuration, environment and geological conditions. But the fatalness can be controlled if practical and effective comprehensive measures of cracking prevention are adopted.The paper is mainly about Sancha Engineering, the key engineering of Qinhuai River and the temperature field and temperature stress of its ship lock floor are analyzed during construction with ANSYS. The main contents of this paper are listed as following:(1) The important research significance and purpose are introduced, as well as general development and temperature crack control of mass concrete in and abroad.(2) The characteristics and reasons of concrete temperature crack are analyzed. The process of temperature transformation, the development of temperature stress and the measures of preventing cracks are expounded.(3) It is expounded in detail about the ANSYS principle of temperature field and temperature stress of mass concrete, as well as calorific capability including heat hydration of cement, adiabatic heating and equation of transient temperature field. Temperature control measure about pipe cooling and FEM calculating about transient temperature field are expatiated.(4) It is analyzed with ANSYS about the temperature fields and temperature stress of concrete ship lock floor in Sancha River during integer molding construction with ANSYS. There are some factors mainly considered such as heat hydration of cement, exterior heat preservation measure, influence of temperature change, pipe cooling, inflation (UEA) and so on. It is more accurate to fix on the positions where cracks easily take place during construction by simulation analysis. The construction scheme of construction and temperature control can be optimized by contrasting the results with and with no mixture.The paper provides effective reference for temperature crack prevention of mass concrete during construction, especially the measures of crack prevention using pipe cooling and with UEA.