主墩承台大体积混凝土温控措施分析  

Analysis of Temperature Control Measures for Mass Concrete of Main Pier Bearing Platform

作　　者：骆伟 Luo Wei(Hunan Shangshang Municipal Construction and Development Co.,Ltd.,Changsha,China)

机构地区：[1]湖南尚上市政建设开发有限公司,湖南长沙

出　　处：《科学技术创新》2023年第12期162-165,共4页Scientific and Technological Innovation

摘　　要：由于桥梁承台属于大体积混凝土结构,水化热高、温度应力开裂是大体积混凝土承台浇筑典型病害,为了解决上述病害,必须采取行之有效的施工控制措施。文章以某特大桥承台大体积混凝土结构浇筑施工为例,根据现场施工条件,针对性提出了冷却管温度控制方案,使用有限元方法就大体积混凝土承台结构的温度场及温度应力进行分析,验证了所设计的冷却管降温方案的可行性,并总结了承台混凝土施工阶段防裂措施。该桥梁工程承台砼采用的温控方案以及一系列其它防裂措拖的运用,最终达到了预期的控裂目标,取得了良好的效果。Due to the large volume concrete structure of bridge bearing platforms,high hydration heat and temperature stress cracking are typical diseases in the pouring of large volume concrete bearing platforms.In order to solve these diseases,effective construction control measures must be taken.The article takes the pouring construction of a large volume concrete structure on the bearing platform of a certain super large bridge as an example,and proposes a targeted cooling pipe temperature control plan based on on-site construction conditions.The finite element method is used to analyze the temperature field and temperature stress of the large volume concrete bearing platform structure,verify the feasibility of the designed cooling pipe cooling plan,and summarize the crack prevention measures during the construction stage of the bearing platform concrete.The temperature control scheme adopted for the bearing platform concrete of this bridge project,as well as the application of a series of other crack prevention measures,ultimately achieved the expected crack control goal and achieved good results.

关 键 词：承台大体积砼 冷却水管 有限元分析 防裂措施 

分 类 号：U445.57[建筑科学—桥梁与隧道工程]