建(构)筑物长大结构取消后浇带的技术探索  

Exploring the Technology of Canceling Post-casting Belt for Building(Structure)Long and Large Structure

作　　者：朱崎颖 ZHU Qi-ying(China Railway Construction Dawan Area Construction Co.,Ltd.,Nansha 511455,China)

机构地区：[1]中铁建大湾区建设有限公司,南沙511455

出　　处：《价值工程》2020年第14期182-184,共3页Value Engineering

摘　　要：对于建(构)筑物的长大结构或是大体积砼结构,因砼凝固水化热产生的温差收缩及自身干缩等变形原因使结构内部出现拉应力,如设计或是施工不当则使结构出现危害性裂缝。以往,通常采取设置后浇带等方案解决上述问题。但设置后浇带影响了结构整体性或难以满足特殊的使用功能要求,故有些建筑对结构提出了无缝要求。本文依托工程实例,简述添加UEA膨胀剂对砼收缩进行补偿而取消后浇带的设计理论、施工工艺及技术措施,以期能够对其它结构取消后浇带的施工起到些许借鉴作用。For long structures or large-volume concrete structures of buildings(structures), tensile stresses appear inside the structure due to deformation such as temperature difference shrinkage and self-shrinkage due to heat of solidification and hydration of the concrete,such as improper design or construction. It will cause harmful cracks in the structure. In the past, the above problems were usually solved by installing a post-casting belt. However, the setting of post-casting belts affects the structural integrity or it is difficult to meet the special functional requirements, so some buildings put forward seamless requirements for the structure. Based on engineering examples, this article briefly describes the design theory, construction technology and technical measures of adding UEA expansion agent to compensate for the shrinkage of the concrete and canceling the post-casting belt, in order to be able to play a reference role in the construction of the postcasting belt cancellation of other structures.

关 键 词：长大结构 裂隙控制 结构拉应力分析 取消后浇带 UEA膨胀剂 

分 类 号：TU7[建筑科学—建筑技术科学]