摘要
Abstract
Taking a high-rise building as an example,this paper probes into the calculation method of temperature crack of mass concrete in raft foundation and concrete construction technology.The parameters such as shrinkage deformation,elastic modulus and thermal stress of concrete of each age are calculated respectively,and then the anti-crack safety factor is calculated.The calculation results show that the anti-crack safety factor of mass concrete at each age is more than 1.0,which meets the anti-crack requirements.In the construction of mass concrete,emphasis is placed on strengthening the material quality inspection and mix design,as well as the construction management of concrete pouring and maintenance,and grasping the key points of construction technology in order to improve the construction quality of raft foundation.The temperature measurement and control is carried out after the end of concrete curing,and the results show that the internal and external temperature difference of mass concrete is small,and there is no risk of temperature cracks.关键词
筏板基础/大体积混凝土/温度裂缝/配合比/温度测控Key words
raft foundation/mass concrete/temperature crack/mix ratio/temperature measurement and control分类
建筑与水利
