Temperature Control and Numerical Analysis of Mass Concrete on Bearing Platform of Huaihe River Bridge in Linhui Pass
Crack control is the key technology in bridge cap construction,and its quality is directly related to the safe operation of the whole bridge.However,in the process of cap pouring,due to the large volume of concrete,large temperature change and other factors,it is easy to cause temperature cracks in the concrete cap,which will affect the service life and safety of the cap.In this paper,based on the construction project of Huaihe River Bridge in Linhui Pass,MIDAS/FEA was used to establish a finite element model of large volume concrete bearing table to simulate and analyze the temperature field of concrete,and the rationality of the model was veri-fied by comparing the simulation results with the measured temperature.The direct influence of external environ-ment temperature could be significantly reduced through the arrangement of cooling water pipes and the mainte-nance of heat storage.The maximum temperature difference in the pouring stage of mass concrete cap is con-trolled in a reasonable range,and the temperature crack of concrete cap is reduced.
mass concreteheat of hydrationtemperature crackspipe coolinginsulation measures
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