施工技术
施工技術
시공기술
CONSTRUCTION TECHNOLOGY
2014年
17期
73-76
,共4页
马重刚%周鹏华%朱海军%谢小飞%朱琳%张利平
馬重剛%週鵬華%硃海軍%謝小飛%硃琳%張利平
마중강%주붕화%주해군%사소비%주림%장리평
桥梁工程%悬索桥%钢梁%顶推技术%桁架%施工技术
橋樑工程%懸索橋%鋼樑%頂推技術%桁架%施工技術
교량공정%현색교%강량%정추기술%항가%시공기술
bridges%suspension bridges%steel girders%incremental launching%trusses%construction
以武汉江汉六桥钢梁大跨顶推施工为背景，通过基本原理分析采用临时结构对钢梁刚度加强方式，并对不同加强方案进行对比分析，选取合理覆盖范围的桁架结构，以减小顶推最大悬臂90m时导梁前端挠度及钢梁应力；通过对各个顶推施工阶段计算分析和实际施工监测表明，采用桁架结构能够很好地解决导梁挠度过大和钢梁应力水平过高的问题。
以武漢江漢六橋鋼樑大跨頂推施工為揹景，通過基本原理分析採用臨時結構對鋼樑剛度加彊方式，併對不同加彊方案進行對比分析，選取閤理覆蓋範圍的桁架結構，以減小頂推最大懸臂90m時導樑前耑撓度及鋼樑應力；通過對各箇頂推施工階段計算分析和實際施工鑑測錶明，採用桁架結構能夠很好地解決導樑撓度過大和鋼樑應力水平過高的問題。
이무한강한륙교강량대과정추시공위배경，통과기본원리분석채용림시결구대강량강도가강방식，병대불동가강방안진행대비분석，선취합리복개범위적항가결구，이감소정추최대현비90m시도량전단뇨도급강량응력；통과대각개정추시공계단계산분석화실제시공감측표명，채용항가결구능구흔호지해결도량뇨도과대화강량응력수평과고적문제。
Based on incremental launching construction of the steel girder for the Sixth Jianghan Bridge in Wuhan,the effect of temporary structure on strengthening mode of steel girder stiffness is analyzed by basic principle, strengthening schemes are compared, truss structure with reasonable coverage area is chosen to reduce the steel girder stress and deflection in front of guide girder in incremental launching construction of the maximum cantilever with 90m. The calculation analysis and actual construction monitoring show that truss structure can solve the problems of too large deflection of guide girder and too large stress of steel girder.
