多箱室宽幅长联连续梁施工技术  

Construction Technology of Multi-box Wide and Long Continuous Girders

作　　者：林晓旭[1] 范道林[1] 黄艳梅[1] LIN Xiaoxu;FAN Daolin;HUANG Yanmei(Sinohydro Bureau 7 Co.,Ltd.,Chengdu Sichuan 610213)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213

出　　处：《四川水力发电》2024年第5期71-75,共5页Sichuan Hydropower

摘　　要：随着预应力混凝土技术的不断进步以及高强材料和高性能混凝土在桥梁工程中的广泛应用,连续箱梁已逐步向多箱室、宽幅、大跨度长联的方向发展。但对于3箱以上的多箱室、20m的宽幅、长度为169m的多跨连续梁的施工却鲜有经验可供借鉴。结合某市政工程桥梁的特性,阐述了采用大量先进的设计、施工技术和监控监测手段解决大方量、薄壁混凝土施工质量控制难度大、梁体养护控制难度大、预应力张拉压浆安全质量控制难度大、预应力穿束施工困难等难题的研究与应用过程。With the continuous advancement of prestressed concrete technology and the widespread application of high-strength materials and high-performance concrete in bridge engineering,continuous box girders are gradually moving towards the direction of multi box compartments with large spans and long connections.However,there is little experience in the construction of multi box compartments with more than 3 boxes,20m width,and 169m length multi span continuous girders.Combined with the characteristics of a municipal engineering bridge,this paper describes the research and application process of using a large number of advanced design,construction techniques,and monitoring methods to solve the difficulties in quality control of large volume thin-walled concrete construction,girder maintenance control,safety quality control of prestressed tensioning and grouting,and difficulties in prestressed girder penetration construction.

关 键 词：多箱室 连续梁 薄壁 预应力 

分 类 号：U445[建筑科学—桥梁与隧道工程] U443.32[交通运输工程—道路与铁道工程]