For the pouring of the zero block of a prestressed concrete continuous rigid frame bridge,due to the time limit,the one-time pouring method is adopted,which has caused hydration heat temperature control problems.This paper puts forward a large-volume cooling water tank inside the hollow part of the zero block,so as to control the concrete hydration heat temperature of the zero block.Firstly,MIDAS/FEA finite element software is used to simulate the temperature field and temperature change of the hydration heat of the zero block.Then,according to the simulation results,the temperature measurement system for the zero block is designed to observe the temperature change of the zero block in real time.By comparing the calculated and measured values of temperature at each measuring point,it is found that the new temperature control method can effectively control the peak temperature within 76 ℃,and the maximum temperature difference within 20 ℃.
关键词
大体积混凝土/连续刚构桥/零号块/水化热/温控方法
Key words
mass concrete/continuous rigid frame bridge/zero block/heat of hydration/temperature control meth-od
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