摘要
深中通道伶仃洋大桥东、西泄洪区非通航孔桥为跨径110 m的连续钢箱梁桥,有2孔钢箱梁上跨伶仃洋大桥海中锚碇。因中山大桥提前合龙,受通航限制,该区域共20片大节段钢箱梁(4片长86.1 m,重1097 t;16片长110 m,重1408 t)需由武船中山基地码头船运至中铁南方基地码头吊装卸船,转运后再由“天一号”运架一体船取梁。根据中铁南方基地码头2台2000 t龙门吊情况,进行大节段钢箱梁吊装卸船方案比选及配套吊具设计。对单钩单梁、双钩单梁、双钩双梁3种吊装卸船方案进行分析,考虑经济性和操作便利性,选择双钩双梁方案。根据吊装需要,设计4套相同的吊具(主要由扁担梁、销轴、绳轮、绳圈和卸扣等组成),110 m和86.1 m大节段钢箱梁分别设置16套和12套吊点,每根扁担梁下设4个吊耳。采用MIDAS软件建立钢箱梁及扁担梁整体模型,分析钢箱梁、吊具及连接构件的力学性能。结果表明:钢箱梁、钢箱梁吊耳及连接螺栓、扁担梁、扁担梁吊耳及销轴的受力均满足规范要求。设计的吊具已成功应用于20片大节段钢箱梁的吊装卸船施工。
The non-navigable bridges in the east and west flood diversion zones of Lingdingyang Bridge of Shenzhen-Zhongshan Link are continuous steel box girder bridges with spans of 110 m.The installation of 20 large steel box girder segments in two spans over the offshore anchorages of Lingdangyang Bridge,including four 86.1 m-long segments weighing 1097 t each,and sixteen 110 m-long segments weighing 1408 t each,was challenging,due to the ahead-of-schedule closure of the Zhongshan Bridge and the navigation clearance limitation.The segments should be shipped from the jetties owned by the Wuchang Shipbuilding Industry Group Co.,Ltd.in Zhongshan City to the jetties owned by the China Railway South Investment Group Co.,Ltd.,afterwards,unloaded and transferred to the locations for installation by Crane Tianyi which is capable of transporting and installing girders.Customized hoisting and unloading plans for the large steel box girder segments and spreaders were developed to accommodate the two 2000 t-capacity gantry cranes.Three hoisting plans were compared,including the single hook and single segment plan,double-hook and single segment plan,and double-hook and double-segment plan.The double-hook and double-segment plan was selected,considering the economy and ease-of-operation.Four sets of spreaders were used,each consisting of primary components of spreaders,pins,pulleys,rope coilers and shackles.The 86.1 m and 110 m-long segments are fitted with 12 and 16 hoisting points,respectively,with 4 under each spreader.The numerical simulation was carried out in MIDAS software to analyze the mechanical properties of the steel box girder segment,spreader and connecting components.It is shown that the load bearing capacities of the steel box girder segments,lifting lugs and bolts in the steel box girder segments,spreaders,as well as lifting lugs and pins in spreaders met the requirements.The hoisting and unloading of the 20 large steel box girder segments was carried out smoothly.
作者
孙悦楠
黄利航
阮家顺
向晋华
SUN Yuenan;HUANG Lihang;RUAN Jiashun;XIANG Jinhua(Shenzhen-Zhongshan Link Administration Center,Zhongshan 528400,China;Wuchuan Heavy Engineering Co.,Ltd.,Wuhan 430415,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2024年第1期140-147,共8页
Bridge Construction
基金
广东省重点领域研发计划项目(2019B111106002)。
关键词
连续钢箱梁桥
大节段钢箱梁
吊装卸船
双钩双梁方案
扁担梁
吊具设计
有限元法
continuous steel box girder bridge
large steel box girder segment
hoisting and unloading
double-hook and double-segment plan
spreader
spreader design
finite element method
