摘要
查考大桥(Puente Chacao)位于智利南部,连接智利本土和奇洛埃岛,由智利公共工程部面向国际招标,采用EPC模式建设。中国一家联合体提交的投标方案为(216+1 045+1 190+319)m的三塔两跨连续钢箱梁悬索桥。为了满足招标文件对工程功能及施工工期的要求,对各重要的施工分项经过方案比选后确定:桥塔均采用混凝土塔,塔柱采用液压爬模分节段现浇;南塔和中塔桥塔基础采用扩大基础,北塔采用钻孔灌注桩基础,南、北锚碇均采用重力式锚碇,基坑采用分台阶明挖;加劲梁采用钢箱梁,在国内加工完成后节段整体海运至桥位,采用跨缆吊机吊装架设;主桥设2根主缆,采用PPWS法架设。
Chacao bridge is located in the south of Chile ,linking the mainland and Chiloe Is-land .The tender conducted by Chile′s Department of Public Works is for companies worldwide , and the project will adopt EPC mode . A consortium from China proposed a scheme of （216 ＋1 045＋1 190＋319）m three-tower two-span continuous steel box girder suspension bridge .To ac-commodate functions of the project and the construction schedule prescribed in the tender docu-ments ,the solutions for each key construction items were determined through scheme comparison and selection .All the towers are concrete towers ,the columns of which are cast in situ in sections by hydraulic climbing formwork .Spread foundations are chosen for the south and intermediate towers ,and the bored pile foundation for the north tower .The south and north anchor blocks are of gravity type ,foundation pits of which are to be excavated in steps .The stiffening girder adopts steel box girder ,w hich is to be fabricated in China in segments before being shipped to the bridge site .The girder sections will be erected by cable cranes .The main bridge has two main cables which are erected by parallel wire strand method .
出处
《世界桥梁》
北大核心
2014年第4期20-24,共5页
World Bridges
关键词
三塔悬索桥
桥塔
钢箱梁
主缆
猫道
锚碇
施工
three-tower suspension bridge
bridge tower
steel box girder
main cable
cat-walk
anchor block
construction
