超宽连续刚构C70高性能混凝土落地支架施工技术  

Advanced Continuous Girder C70 High-performance Concrete Pile-supported Construction Technology

作　　者：张涛 ZHANG Tao(Road and Bridge Construction Co.,Ltd.,Zhongshan Guangdong 528405)

机构地区：[1]中交路桥华南工程有限公司,广东中山528405

出　　处：《中国科技纵横》2024年第24期131-133,共3页China Science & Technology Overview

摘　　要：预应力混凝土连续刚构是目前国内常用的桥梁结构形式,具有造型简洁优美、整体性能强、抗弯抗扭刚度大、养护简单、施工便捷和造价低廉等优点,在桥梁工程领域获得广泛应用。连续刚构桥主梁在施工、运营阶段中出现不同形式的裂缝难以杜绝,且随着混凝土标号和跨度的提升,裂缝出现的概率增大。为解决超宽连续刚构C70高性能混凝土落地支架施工存在的早期开裂问题,提高混凝土结构的耐久性,本文研究并介绍超宽连续刚构C70高性能混凝土落地支架施工技术的工艺要求与优势等内容。Prestressed concrete continuous rigid frame is the current commonly used bridge structure form in China,which has the advantages of simple and elegant appearance,strong overall performance,large anti-bending and torsional rigidity,easy maintenance,convenient construction,and low cost.Therefore,it has been widely applied in the field of bridge engineering.The various types of cracks that appear in the main beam of the continuous rigid frame bridge during construction and operation are difficult to eliminate,and the probability of cracking increases as the concrete grade and span increase.In order to solve the problem of early cracking in the superwide continuous rigid frame C7o high-performance concrete ground support construction and improve the durability of concrete structures,the"superwide continuous rigid frame C7o high-performance concrete ground support construction technology"was born.

关 键 词：超宽连续刚构 C70高性能混凝土 连续刚构落地支架 C70混凝土防开裂 

分 类 号：U448[建筑科学—桥梁与隧道工程]