武西高速桃花峪黄河大桥主桥施工方案  

Construction Schemes for Main Bridge of Taohuayu Huanghe River Bridge on Wuzhi-Xixia Expressway

作　　者：金雷 

机构地区：[1]河南高速公路发展有限公司,河南郑州450052

出　　处：《桥梁建设》2011年第1期75-78,共4页Bridge Construction

摘　　要：桃花峪黄河大桥主桥为双塔三跨自锚式悬索桥,跨度布置为(160+406+160)m。桥塔为门式混凝土结构,加劲梁为流线型钢箱梁,主缆采用高强镀锌钢丝预制平行索股。结合该桥主体结构特点和桥位处施工条件,桩基采用旋挖钻机与回旋钻机结合施工,水中承台采用钢管桩围堰施工,岸边承台采用大开挖配合深井降水施工;塔柱采用液压自升式爬模施工,塔柱上横梁采用托架法施工,下横梁采用支架法施工;上部结构采用先梁后缆顺序施工,加劲梁利用单向多点顶推计算机控制系统进行各点同步顶推施工,与钢锚梁合龙后采用PPWS法施工主缆,主缆完成体系转换后进行桥面系施工。The main bridge of Taohuayu Huanghe River Bridge is a two-tower and three-span self-anchored suspension bridge with span arrangement（160＋406＋160） m.The towers of the bridge are the concrete portal frames,the stiffening girder is the streamlined steel box girder and the high strength galvanized prefabricated parallel wire strands（PPWS） are used for the main cables.In the light of the characteristics of the principal structure of the bridge and the construction conditions at the bridge site,the pile foundations were constructed by the combined application of rotary boring machine and abrasion boring machine,the in-water pile caps by the steel pipe pile cofferdams and the pile caps nearby the river banks by the mass excavation combined with the deep well dewatering.The tower columns were constructed by the hydraulic self-climbing formwork,the upper cross beams of the columns by the bracketing method and the lower cross beams by the scaffolding method.The superstructure was constructed by the sequence of ＂erecting the girder first and cables late＂.The stiffening girder was erected by the one-way,multi-point and synchronous incremental launching controlled by computer system and after the girder was closed with the steel anchor girders,the main cables were erected by the PPWS method and the deck surfacing was finally constructed after the construction of the main cables was completed and the system of the cables was transformed.

关 键 词：悬索桥 钢梁 箱形梁 顶推法架桥 方案 桥梁施工 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U445.462[交通运输工程—道路与铁道工程]