论文部分内容阅读
大体积混凝土施工养护方式及技术指标选取往往以工程经验为基础,结合现场温控施工进行养护调整。由于缺乏一定的理论基础,不恰当的养护方式和技术指标往往会导致施工裂缝的进一步加剧。以CPR1000核电站基础为例,开展有限单元法分析养护技术指标及养护方式,分析不同养护方式和技术指标下混凝土可能出现的应力状态,进而优化养护方式和技术指标的选取及指导施工养护技术措施的制定。理论分析结果表明,有区别的动态的养护技术措施更有利于混凝土的成型质量,倡导的有限单元法确定养护方式及技术指标法可为类似基础施工养护提供经验积累和理论支持。
Mass concrete construction maintenance methods and technical indicators are often selected based on engineering experience, combined with on-site temperature control construction conservation adjustments. Due to the lack of a certain theoretical basis, inappropriate maintenance methods and technical indicators often lead to further aggravation of construction cracks. Taking the foundation of CPR1000 NPP as an example, the finite element method is used to analyze the maintenance technical indexes and maintenance methods, and to analyze the possible stress states of concrete under different curing methods and technical indexes so as to optimize the selection of curing methods and technical indexes and to guide the technical measures of construction maintenance Make. The results of theoretical analysis show that the dynamic curing technologies are more conducive to the forming quality of concrete, and the finite element method advocated by the finite element method can provide experience accumulation and theoretical support for similar basic construction maintenance.