复杂曲线钢箱梁顶推施工技术

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【中图分类号】：U445.4 【文献标志码】：A 【文章编号】：1008-3197（2025）02-34-05

【DOI编码】：10.3969/j.issn.1008-3197.2025.02.008

Construction Technology of Complex Curve Steel Box Girder Jacking

ZHANG Bin1，2

（1.ChinaRailwaCostructionBdgeEngieingBureauGoupCoLd.anjin3Oo，hina；ianjinKeLaboratoryoftelt Construction Technologyand Equipment，Tianjin3Oo3OO，China）

【Abstract】：Aimingat the characteristicsof smallradius，large longitudinal slope，complexcurveof the steelboxgirderof Macao Bridge，BrampBA8＼～BP7crawlercrane + section bracket method erection first，BP7＼～BP1 multipoint synchronous curve pushing construction scheme.According to the needs of jacking，temporary support， steel guide beam，temporary connection，steel box girder sectionfactory prefabrication，ship to the site，after using gantry crane lifting to theassembly platform welding into the whole section jacking；jacking construction，through flat curve and vertical curve simulation，reduce the constructioncorrction，3D numerical simulation and whole process simulation analysis with intelligent jacking control system，forecast correction measures inadvance，reasonably control the jacking force，efectively ensure the linear shape and construction safety.

【Key words】：urban bridge；steel box girder；top push construction

钢箱梁因自重小、刚度大、跨越能力强、结构美观在城市立交或大型桥梁匝道桥中得到广泛应用。（剩余6037字）