大型船坞龙门吊建造技术要点  

The Key Points in Construction Techniques of Large Scale Dock Gantry Crane

作　　者：李冬明 沈旭东 LI Dong-ming;SHEN Xu-dong(Hudong-Zhonghua Ship Building(Group)Co.,Ltd.,Shanghai 200129,China)

机构地区：[1]沪东中华造船(集团)有限公司,上海200129

出　　处：《船海工程》2020年第3期73-76,共4页Ship & Ocean Engineering

基　　金：国家发改办高技[2015]1409号。

摘　　要：为保证大型船坞龙门吊建造项目的顺利施工,提高建造质量及精度,提出钢结构分段划分原则及余量加放方案,采取抛物线进行主梁预拱设计,明确主梁、刚性腿、柔性腿的建造难点在于精度控制,制定建造施工方案,针对其各自特点提出控制焊接变形具体的工艺方法。对龙门吊进行完工检验,所有指标满足设计要求。To ensure the construction project of large scale dock gantry crane,and improve its quality and precision,the segmentation principle and margin increment scheme were proposed to guide construction.The parabolic curve was used to design the main beam pre-camber.The construction difficulties for main beam,rigid leg and flexible leg were also point out.The construction schemes were made,and some concrete processing methods were given to control welding deformation.The completion inspection of the gantry crane showed that all the indexes meet the design requirements.

关 键 词：龙门吊 精度控制 焊接变形 建造工艺 

分 类 号：U673.3[交通运输工程—船舶及航道工程]