Abstract: With the large-scale construction of expressway in China , biulding big-volume concrete and how to keep its quality are often met in bridge construction .This paper analyses the reasons why the crack often appears in biulding bigvolume concrete , puts corporated method , and offers some new ideas on the development of the technique of biulding big-volume concrete in bridge construction

Key words: big-volume concrete , concrete casting , expand by heating , temperature field

摘要： 随着我国高速公路的兴建，在桥梁施工过程中经常会遇到大体积砼的浇注。如何确保其施工质量是一个非 常重要的问题。笔者就大体积砼在桥梁施工过程中裂缝原因的分析，并提出相应的解决方法以供同行参考，为桥 梁大体积砼施工技术的发展提出自己的看法

关键词: 大体积砼, 砼浇注, 热膨胀, 温度场