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ID:28377579
大小:6.28 MB
页数:19页
时间:2018-12-09
《预应力砼简支梁桥位灌注施工》》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、高速铁路非标准简支梁施工工法中铁十八局集团有限公司桑松龄栾兆增曹海清1.前言随着近几年高速铁路的大发展,在京沪高速铁路建设中,桥梁占到正线长度的86.5%,而桥梁中多数为简支梁桥,绝大多数的标准简支梁在梁场利用定型钢模板在梁场预制,而非标准梁因跨度不一,若采用预制梁,将加大施工生产成本。沧德特大桥该段桥地震动峰加速度为0.1g,场地类别为Ⅲ类。我工区承担的后张法预应力混凝土简支箱梁为沧德特大桥B29~B30号墩、B57~B58及C68-C69号墩之间的非标梁。其中,B29~B30号墩箱梁计算跨度为19.5m,B57~B58号墩箱梁计算跨度为30.8m,C68-C69号墩箱梁计算跨度
2、为29.8m。该段简支箱梁均位于直线上,且地势较为平坦,梁体混凝土强度为C50。箱梁结构形式设计为单箱单室等高简支梁,梁端顶板、底板及腹板局部向内侧加厚,在结构外侧的腹板与顶底板相交处均采用圆弧倒角过渡。梁高3.05m,底宽为5.5m,梁顶宽12.0m。在腹板上设Φ100mm的通风孔,底板上设Φ90mm的泄水孔。2.工法特点2.1搭设满堂支架作箱梁底板支撑系统;2.2内模采用木模。内模采用[10槽钢作支撑骨架分节拼装,骨架之间接头采用斜法兰连接,拆卸方便。模板采用3.5cm厚木板,在内模骨架的顶面与侧面安装木板与骨架通过螺栓固定后,再在木板表面上包裹地板革作为内模的面层。内模底部不
3、安装模板,主要考虑底板混凝土入模与振捣方便。2.3利用全站仪、电子水准仪等仪器对桥面六面坡及桥梁外缘进行精确定位,确保桥梁的整体线形。3.适用范围适用于平原地区非标准简支桥梁施工。4.工艺原理Opinionsandsuggestionsontheparty'smasslineeducationalpracticeAccordingtothecentralandprovincial,municipalunifieddeployment,accordingtomunicipalPartycommittee"aboutcarryingouttheparty'smasslineeducat
4、ionalpracticeactivityinthecity'simplementationopinions,thespiritoftheparty'smasslineeducationalpracticeactivitiesfrom20**inJanuaryto99months,carriedoutatalllevelsofdepartmentsanddirectlyaffiliatedinstitutionsandgrass-rootspartyorganizations.AccordingtomyactualCounty,thecountytocarryouttheeduca
5、tionpracticeputforwardthefollowingimplementationopinions.First,theoverallrequirementsCountycountyeducationpracticetotheeighteenPartyofeight,thespiritofthethethirdPlenarySessionofthe18thCPCCentralCommitteeastheguidance,conscientiouslyimplementthespiritofgeneralsecretaryXiJinpingbookseriesofimpo
6、rtantspeech,earnestlyimplementtheCentralCommitteereally,opinionsandadvice><<>,7、tpeopleasthetheme,incarryingforwardthespiritofZhuanglangZhuang,improvetheirworkstyle,servicetothemassesofthepeople,thefoundationofconsolidatinggrassroots,promotetransformationacrossefforts,tofurtherimplementthecentraleightregulationsand
7、tpeopleasthetheme,incarryingforwardthespiritofZhuanglangZhuang,improvetheirworkstyle,servicetothemassesofthepeople,thefoundationofconsolidatinggrassroots,promotetransformationacrossefforts,tofurtherimplementthecentraleightregulationsand
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