承台大体积混凝土温度场计算与温控防裂措施  

Temperature field calculation and preventing crack measure in massive concrete about pillar abutment

作　　者：季日臣[1] 夏修身[1] 陈尧隆[2] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]西安理工大学水利水电学院,陕西西安710048

出　　处：《混凝土》2006年第9期92-93,95,共3页Concrete

基　　金：兰州交通大学"青蓝"人才工程基金项目(QL-05-13A)

摘　　要：根据三维热传导理论,用有限元程序ANSYS对兰州小西湖黄河大桥承台大体积混凝土的浇筑温度场进行仿真分析,计算表明:大体积混凝土施工时,由于水泥水化热的作用,造成混凝土表面与中心产生较大的温差,将导致混凝土表面产生裂缝。施工时应采取温控防裂措施,减小混凝土的水化热和内外温差。According to three-dimension thermal conductivity theory and boundary condition, temperature field of massive concrete of pillar abutment was calculated in Lanzhou Xiaoxihu Yellow River Bridge. Calculation result indicates that when massive concrete is constructed, cement hydration heat will bring difference in temperature between surface and center. It induces to produce crack on surface. In final the suggestion on crack control measure for worksite is given.

关 键 词：桩基承台 水化热 温度场 防裂措施 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]