Study of control measures for hydration heat of mass concrete with cold pipe
There are many factors that affect the hydration heat temperature of large volume concrete bearing platforms,among which the diameter and material of the cooling water pipes,as well as the inlet temperature and flow rate of the cooling water,have a significant impact.In order to explore the actual impact of these factors on the hydration heat,taking the Huqing Yakou Grand Bridge as the engineer-ing background,the impact of various factors on the bridge cushion cap is explored through finite element model calculation.The results show that the diameter of the cooling water pipe and the inlet temperature of the cooling water have a greater impact on the hydration heat,and are positively correlated.However,in order to consider its economy and feasibility,0.03 m diameter and 20 ℃ inlet temperature are the best choices.Although the flow rate of cooling water,the material and arrangement of cooling water pipes have little impact on the hydra-tion heat temperature,choosing a reasonable plan can help reduce the temperature gradient inside the bearing platform.The research results have guiding significance for the hydration heat temperature control scheme of prestressed concrete rigid frame bridge caps.
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