Temperature Difference Control of Radiation-shielding Mass Concrete Construction in Winter
Taking the linac chambers of the cancer hospital branch of Chinese Academy of Medical Sciences(Lang-fang Campus)as an example,a study was conducted on the temperature difference control of radiation-shielding mass concrete constructed in winter.The distribution pattern of the concrete temperature field was finite element numerical simulation.It was proposed that different temperature difference control measures should be adopted in different parts of concrete construction.The effectiveness of the temperature difference control measures was verified by on-site monitoring.The research results show that the environment temperature and concrete molding tempera-ture only affects the peak temperature and temperature rise of concrete in different components,and don't change the temperature distribution law of concrete temperature field.That is,the high and low temperature distribution ar-eas of concrete of walls,top plates,and bottom plates are consistent;The duration of concrete pouring affects the molding temperature,resulting in a certain difference between the numerical simulation results and the on-site monitoring results.The numerical simulation results should be improved.The temperature difference control mea-sures adopted in this study include double-layer formwork for the wall,water storage and maintenance on the top plate,and thermal insulation quilt covering the bottom plate,which are effective and stable.
radiation-shielding mass concreteconstruction in wintertemperature difference controlnumerical simulationon-site temperature monitoring
国家科技期刊平台
NSTL
万方数据
维普
