The Influence of Construction Parameters on the Temperature Field of Rock-Filled Concrete

This paper investigates the distribution characteristics and variation rules of the temperature field of rock-filled concrete during pouring. Based on the thermal model accounting for the hydration rate, it uses ANSYS software to study the influence rules of construction parameters, such as the rock-filled ratio, time between pours, pouring thickness at the peak value of rising temperature, temperature difference in the core and surface, and the position of the peak value of rising temperature during the construction of rock-filled concrete. The results indicate that, under varied rock-filled ratios, time between pours, and pouring thicknesses, the variation rules of the peak value of rising temperature, temperature difference in the core and surface, and the position of the peak value of rising temperature are the same. As the rock-filled ratio increases, the peak value of rising temperature and the temperature difference in the core and surface decrease, and the variation range of the position of the peak value of rising temperature enlarges as the number of pouring layers increases. When the time between pours is extended, both the peak value of rising temperature and the temperature difference in the core and surface decrease, and the fluctuation amplitude of the position of the peak value of rising temperature increases with the number of pouring layers. With the increase in the pouring thickness, the peak value of rising temperature and the temperature difference in the core and surface increase, and the position of the peak value of rising temperature does not change significantly with an increase in pouring layers. The maximums of the peak value of rising temperature and temperature difference in the core and surface are 15.56 °C and 14.54 °C, respectively, which meet the requirements of the specifications. The peak value of rising temperature has a linear relationship with the pouring layers. Therefore, constructing a hundred-meter-high dam is possible by controlling construction parameters, such as the rock-filled ratio, time between pours, and time between pours without taking temperature control measures.

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