大体积混凝土温度演变规律研究  

Research on temperature evolution law in mass concrete

作　　者：夏雄[1] 吴炎[1] 胡坤[1] 肖世国[2] 

机构地区：[1]常州大学岩土工程研究所,江苏常州213164 [2]西南交通大学地质工程系,四川成都610031

出　　处：《混凝土》2017年第6期152-156,160,共6页Concrete

基　　金：国家自然科学基金项目(51578466)

摘　　要：为研究大体积混凝土温度演变规律,以烟台毓璜顶片区筏板基础大体积混凝土工程为背景,采用现场实测和理论分析相结合的方法,着重分析对温度场经时变化规律以及空间分布规律。通过分析大体积混凝土中心温度的经时变化、表面温度的经时变化,总结出大体积混凝土中心最高温度、表面温度随时间变化的3个阶段并对其变化曲线进行描述,而对温度场的空间分布发现各测位温度沿垂直方向呈">"形态分布,由中心向上表面、下底面逐渐减小;沿水平方向,由中心向边缘逐渐减小;同一时刻,靠近混凝土中心部位的温度梯度大于靠近混凝土上、下表面以及边缘部位的温度梯度。In order to study temperature evolution law in mass concrete, based on raft foundation mass concrete of Yuhuang top in Yan- tai,the temperature variation with time and spatial distribution were observed by the way of field measurement and theoretical analysis. Through analyzing the time variation of the center and surface temperature of mass concrete, summed up the three stages with time change of the center and surface temperature of mass concrete and the curve was described.The results of spatial distribution showed that the distri- bution of temperature along the vertical direction was in the form of ＂〉＂, which was gradually decreased from the center to the upper sur face and bottom surface.Along the horizontal direction,temperature gradually decreased from the center to the edge.At the same time,the temperature gradient near the center in the concrete was larger than that in surface and edge.

关 键 词：大体积混凝土 温度 演变规律 经时变化 空间分布 

分 类 号：TU528.01[建筑科学—建筑技术科学]