世界桥梁
世界橋樑
세계교량
WORLD BRIDGE
2014年
6期
31-35
,共5页
斜拉桥%公铁两用桥%钢桁梁%试拼装%整体焊接%转体翻身%抗推拉刚性斜撑
斜拉橋%公鐵兩用橋%鋼桁樑%試拼裝%整體銲接%轉體翻身%抗推拉剛性斜撐
사랍교%공철량용교%강항량%시병장%정체한접%전체번신%항추랍강성사탱
cable-stayed bridge%rail-cum-road bridge%steel truss girder%trial assembly%inte-gral welding%rotation and turning%rigid diagonals resisting pushing and pulling forces
铜陵公铁两用长江大桥为五跨连续钢桁梁三索面斜拉桥，钢桁梁采用板桁结合形式，由3片主桁、上层正交异性公路板式桥面、下层正交异性铁路钢箱桥面及横联构成。钢桁梁采用整体焊接式桁片结构，每2个节间的主桁上、下弦杆，斜杆，竖杆通过整体节点焊接成桁片上桥安装。为验证制造工艺和精度并指导实桥施工，选取3．5个连续节间钢桁梁在工厂内一次完成立体试拼装。由于主桁桁片采用水平拼装制作工艺，采用800 t龙门吊机2×200 t吊钩提升加横移对桁片进行90°转体翻身后试拼装。试拼装过程中设置了抗推拉刚性斜撑增强桁片与铁路桥面的稳定性；在斜杆件加垫片，通过调整间隙控制桥梁预拱度。试拼装过程中设置了测量控制网，检测结果满足设计和验收标准，达到了立体试拼装目的。
銅陵公鐵兩用長江大橋為五跨連續鋼桁樑三索麵斜拉橋，鋼桁樑採用闆桁結閤形式，由3片主桁、上層正交異性公路闆式橋麵、下層正交異性鐵路鋼箱橋麵及橫聯構成。鋼桁樑採用整體銲接式桁片結構，每2箇節間的主桁上、下絃桿，斜桿，豎桿通過整體節點銲接成桁片上橋安裝。為驗證製造工藝和精度併指導實橋施工，選取3．5箇連續節間鋼桁樑在工廠內一次完成立體試拼裝。由于主桁桁片採用水平拼裝製作工藝，採用800 t龍門弔機2×200 t弔鉤提升加橫移對桁片進行90°轉體翻身後試拼裝。試拼裝過程中設置瞭抗推拉剛性斜撐增彊桁片與鐵路橋麵的穩定性；在斜桿件加墊片，通過調整間隙控製橋樑預拱度。試拼裝過程中設置瞭測量控製網，檢測結果滿足設計和驗收標準，達到瞭立體試拼裝目的。
동릉공철량용장강대교위오과련속강항량삼색면사랍교，강항량채용판항결합형식，유3편주항、상층정교이성공로판식교면、하층정교이성철로강상교면급횡련구성。강항량채용정체한접식항편결구，매2개절간적주항상、하현간，사간，수간통과정체절점한접성항편상교안장。위험증제조공예화정도병지도실교시공，선취3．5개련속절간강항량재공엄내일차완성입체시병장。유우주항항편채용수평병장제작공예，채용800 t룡문조궤2×200 t조구제승가횡이대항편진행90°전체번신후시병장。시병장과정중설치료항추랍강성사탱증강항편여철로교면적은정성；재사간건가점편，통과조정간극공제교량예공도。시병장과정중설치료측량공제망，검측결과만족설계화험수표준，체도료입체시병장목적。
The Tongling Changjiang River Rail‐cum‐Road Bridge is a five‐span continuous steel truss girder cable‐stayed bridge with three cable planes .The steel truss girder is the combined or‐thotropic steel plates and steel trusses structure ,containing three main trusses ,the upper ortho‐tropic steel plate deck for vehicles ,the lower orthotropic railway steel box deck and lateral brac‐ings .The steel truss girder is a integrally‐welded truss structure ,the upper and lower chords ,di‐agonal struts and vertical struts of the main trusses in every two blocks are welded by integral nodes to be truss block for assembling on the bridge .In order to verify the manufacturing tech‐nique and precision and to direct the construction of the real bridge ,the steel truss girder in 3 .5 continuous blocks were selected to conduct one‐time trial vertical assembly in the factory .The main truss blocks were fabricated by the horizontal assembling technique ,the 800 t overhead lift‐ing gantry with two lifting hooks of 200 t was adopted to lift and horizontally move the truss blocks and complete their 90°rotation and turning ,and then conduct the trial assembly .During the trial assembly ,the rigid diagonals resisting pushing and pulling forces were added to strengthen the stability of the truss blocks and the railway bridge deck .At the inclined members ,shims were wedged to control the precamber of bridge via adjusting the spacing .The survey control network was programmed as well during the assembling process ,the results of the inspection meet the de‐sign and acceptance standard ,achieving the goal of vertical assembly .
