基于温度监测试验的底板温度变化规律分析

Analysis of temperature variation of concrete slab based on temperature monitoring test

基于综合服务中心工程的温度监测试验,对混凝土底板长期的温度变化规律进行研究,得到环境温度在水化热阶段和施工阶段对结构内部温度的影响.对实测的温度数据和相应温差进行线性回归,提出了底板温差的计算公式.对水化热温差、当量温差、环境温差等进行对比分析,得到底板前期的温差以水化热温差为主,中长期温差的主要构成是水化热温差和当量温差,环境温差的占比则与底板的厚度和浇筑后的季节条件相关,并根据分析结论提出了减小温差的措施.

Based on the temperature monitoring test of the comprehensive service center project,the long-term temperature change law of the concrete slab is studied to obtain the influence of the ambient temperature on the internal temperature of the structure during the hydration heat phase and the construction phase.Linear regression is carried out with the measured temperature data and the corresponding temperature difference,the calculation formula of the temperature difference of the concrete slab is proposed.With a comparative analysis of hydration heat temperature difference,equivalent temperature difference,ambient temperature difference,etc.,it is concluded that the temperature difference in the early stage of the concrete slab is mainly hydration heat temperature difference,the main components of the mid-long term temperature difference are hydration heat temperature difference and equivalent temperature difference,and the proportion of ambient temperature difference is related to the thickness of the concrete slab and the seasonal conditions after pouring.Measures to reduce the temperature difference are proposed according to the analysis conclusion.