世界桥梁
世界橋樑
세계교량
WORLD BRIDGE
2014年
4期
6-9
,共4页
铁路桥%连续钢桁梁%双柔性拱%分层架设%分次合龙%起重机%桥梁施工
鐵路橋%連續鋼桁樑%雙柔性拱%分層架設%分次閤龍%起重機%橋樑施工
철로교%련속강항량%쌍유성공%분층가설%분차합룡%기중궤%교량시공
railway bridge%continuous steel truss girder%double flexible arch ribs%erection carried out at different levels%closure in phases%crane%bridge construction
厦深铁路榕江特大桥主桥为（110＋220＋220＋110） m连续钢桁梁柔性拱桥。主桥钢梁由连续钢桁梁、V形加劲弦钢梁和柔性拱钢梁三部分组成，连续钢桁梁为N形结构，其正交异性整体钢桥面板顶面与下弦杆顶面平齐；柔性拱钢梁由箱形拱肋、吊杆和平联组成，拱肋按二次抛物线布置。针对主桥钢梁结构复杂、连续钢桁梁与柔性拱合龙难度大等技术难题，制定了将连续钢桁梁与柔性拱分层架设、分次合龙的架设方案，先施工连续钢桁梁，再施工柔性拱钢梁。连续钢桁梁用4台全回转架梁起重机，分4个架梁作业面进行架设，分别在两主跨的跨中进行合龙；2个柔性拱钢梁用2台全回转架梁起重机分别从2个柔性拱的外则向主桥中间架设，在主桥中墩处进行对接合龙。
廈深鐵路榕江特大橋主橋為（110＋220＋220＋110） m連續鋼桁樑柔性拱橋。主橋鋼樑由連續鋼桁樑、V形加勁絃鋼樑和柔性拱鋼樑三部分組成，連續鋼桁樑為N形結構，其正交異性整體鋼橋麵闆頂麵與下絃桿頂麵平齊；柔性拱鋼樑由箱形拱肋、弔桿和平聯組成，拱肋按二次拋物線佈置。針對主橋鋼樑結構複雜、連續鋼桁樑與柔性拱閤龍難度大等技術難題，製定瞭將連續鋼桁樑與柔性拱分層架設、分次閤龍的架設方案，先施工連續鋼桁樑，再施工柔性拱鋼樑。連續鋼桁樑用4檯全迴轉架樑起重機，分4箇架樑作業麵進行架設，分彆在兩主跨的跨中進行閤龍；2箇柔性拱鋼樑用2檯全迴轉架樑起重機分彆從2箇柔性拱的外則嚮主橋中間架設，在主橋中墩處進行對接閤龍。
하심철로용강특대교주교위（110＋220＋220＋110） m련속강항량유성공교。주교강량유련속강항량、V형가경현강량화유성공강량삼부분조성，련속강항량위N형결구，기정교이성정체강교면판정면여하현간정면평제；유성공강량유상형공륵、조간화평련조성，공륵안이차포물선포치。침대주교강량결구복잡、련속강항량여유성공합룡난도대등기술난제，제정료장련속강항량여유성공분층가설、분차합룡적가설방안，선시공련속강항량，재시공유성공강량。련속강항량용4태전회전가량기중궤，분4개가량작업면진행가설，분별재량주과적과중진행합룡；2개유성공강량용2태전회전가량기중궤분별종2개유성공적외칙향주교중간가설，재주교중돈처진행대접합룡。
The main bridge of Rongjiang River Bridge on Xiamen-Shenzhen Railway is a contin-uous steel truss girder and flexible arch bridge with span arrangement of (110+220+220+110) m .The steel girder of the main bridge is made up of the continuous steel truss girder ,the steel girder with V-shaped stiffening chords and the flexible arch steel structure .The continuous steel truss girder is an N-shaped structure and the top of its overall orthotropic steel bridge deck is flush with the top of the lower chords .The flexible arch steel structure consists of arch ribs ,hangers and lateral bracings and the arch ribs stretch along a parabolic line .The steel girder structure of the main bridge is complex and the closure of the continuous steel truss girder and the flexible arch exhibits great challenge .Due to these problems ,the scheme of making the erection of the continu-ous steel truss girder and the flexible arch on different levels and adopting the phased closure was formulated ,by which the construction of the continuous steel truss girder would be conducted pri-or to that of the flexible arch steel structure .The continuous steel truss girder was erected by four slewing derrick cranes and on four operation platforms ,and closed at the midspan of the two main spans .The flexible arch steel structure was erected by two slewing derrick cranes following the se-quence of from the outer edge of the two flexible arch ribs to the center of the main bridge ,and closed by way of butt joint at the intermediate pier of the main bridge .
