固化处理技术在预应力混凝土连续箱梁施工中的应用  

Application of Curing Treatment Technology in Prestressed Concrete Continuous Box Girder Construction

作　　者：张钊 陈胜东 周明洪 张群生 朱建华 ZHANG Zhao;CHEN Shengdong;ZHOU Minghong;ZHANG Qunsheng;ZHU Jianhua(China Construction Sixth Bureau Civil Engineering Co.,Ltd.,Tianjin 300457,China)

机构地区：[1]中建六局土木工程有限公司,天津300457

出　　处：《施工技术（中英文）》2023年第3期61-65,共5页Construction Technology

基　　金：国家重点研发计划(2016YFC0802008,2020YFC1511904);中建股份科研课题(CSCEC-2018-Z-22)。

摘　　要：考虑到大跨度桥梁对稳定性的需求,分别使用环氧树脂、碳纤维布、钢板与混凝土混合进行固化处理,并将其应用于预应力混凝土连续箱梁施工中。研究结果表明,使用环氧树脂、碳纤维布、钢板与混凝土混合的固化处理技术均能在预应力混凝土连续箱梁施工中获得较好的效果;环氧树脂混凝土固化技术能够提升预应力混凝土抗剪性能,满足坍落度要求,可在砂石率适中的情况下获得较高的抗压强度;碳纤维布混凝土固化技术能够提升预应力混凝土抗弯性能和抗破坏性能;钢板混凝土固化技术能够提升箱梁刚度,在中载与偏载作用下具有较好的固化处理效果。Considering the demand for stability of long-span bridges, this paper uses epoxy resin, carbon fiber cloth, steel plate and concrete mixed curing treatment technology, and applies it to the construction of prestressed concrete continuous box girder. The research results show that the curing treatment technology of epoxy resin, carbon fiber cloth, steel plate and concrete can achieve good results in the construction of prestressed concrete continuous box girder. The curing technology of epoxy resin and concrete can improve the shear resistance of prestressed concrete, meet the requirements of slump, and obtain higher compressive strength under the condition of moderate sand-gravel ratio. The curing technology of carbon fiber cloth and concrete can improve the flexural performance and failure resistance of prestressed concrete. The curing technology of steel plate and concrete can improve the stiffness of box girder, and has good curing effect under the action of medium load and partial load.

关 键 词：连续箱梁 混凝土 预应力 固化处理 施工技术 

分 类 号：TU74[建筑科学—建筑技术科学]