城市立交桥桥墩上部盖梁UHPC120混凝土实践
Practice of UHPC120 Concrete for the Upper Cover Beam of Urban Interchange Piers
刘烨河 1刘福峰2
作者信息
- 1. 广州轨道交通建设监理有限公司,广东 广州 511400
- 2. 湖南有色金属职业技术学院,湖南 株洲 412006
- 折叠
摘要
城市立交桥盖梁质量要求极高,为达到设计指标,应用UHPC120混凝土是一种新的解决方案.采用UHPC120混凝土一次成型施工来保证其结构力学性能要求,但盖梁体积大,内部最高温度可达120℃以上,温度应力和收缩应力叠加,UHPC120混凝土实体容易开裂,甚至报废.通过实际工程应用,找到解决方案.
Abstract
UHPC120 concrete is an innovative solution to satisfy the high-quality requirement of the cover beam of an urban overpass bridge.The UHPC120 concrete was used in one-stage construction to ensure the structural mechanics and performance requirements.However since the cover beam had a large volume and the maximum internal temperature could be over 120℃,the superposition of temperature stress and shrinkage stress would trigger the crack or even scrap of UHPC120 entity.This study has reviewed the actual engineering application and gives the solution.
关键词
UHPC120/一次成型/盖梁/温度应力/收缩应力/开裂Key words
UHPC120/one-stage construction/cover beam/temperature stress/shrinkage stress/cracking引用本文复制引用
出版年
2024
NETL
NSTL
万方数据