世界桥梁
世界橋樑
세계교량
WORLD BRIDGE
2014年
5期
12-17
,共6页
连续梁桥%箱形梁%波形钢腹板%高跨比%横隔板%抗剪连接件%抗扭刚度%畸变%悬臂施工
連續樑橋%箱形樑%波形鋼腹闆%高跨比%橫隔闆%抗剪連接件%抗扭剛度%畸變%懸臂施工
련속량교%상형량%파형강복판%고과비%횡격판%항전련접건%항뉴강도%기변%현비시공
continuous girder bridge%box girder%corrugated steel web%height-to-span ratio%diaphragm%shear connector%torsional stiffness%distortion%cantilever construction
桃花峪黄河大桥跨北大堤桥为（75＋135＋75） m 波形钢腹板连续箱梁桥，对该桥设计与施工关键技术进行研究。设计阶段研究得出：与预应力混凝土连续箱梁桥相比，波形钢腹板连续箱梁桥具有景观效果好、抗震性能好、施工效率高等优点，确定该桥采用波形钢腹板连续箱梁桥；对比工程造价，确定高跨比取1/18；采用有限元法分析横隔板数量对箱梁抗扭刚度和畸变的影响，确定中、边跨分别设置8道、4道横隔板；对3种型式连接件进行试验研究，确定波形钢腹板与顶、底板分别采用 Twin-PBL 和角钢连接；预应力采用体内和体外混合配束方案，确保维护方便。施工阶段研究得出：随跨径增大，施工位移增量对波形钢腹板加工尺寸影响显著，加工时必须考虑其影响；采用“悬臂桁车技术”保证了钢腹板起吊和安装定位；采用先边跨后中跨合龙方案，确保了大桥顺利合龙。
桃花峪黃河大橋跨北大隄橋為（75＋135＋75） m 波形鋼腹闆連續箱樑橋，對該橋設計與施工關鍵技術進行研究。設計階段研究得齣：與預應力混凝土連續箱樑橋相比，波形鋼腹闆連續箱樑橋具有景觀效果好、抗震性能好、施工效率高等優點，確定該橋採用波形鋼腹闆連續箱樑橋；對比工程造價，確定高跨比取1/18；採用有限元法分析橫隔闆數量對箱樑抗扭剛度和畸變的影響，確定中、邊跨分彆設置8道、4道橫隔闆；對3種型式連接件進行試驗研究，確定波形鋼腹闆與頂、底闆分彆採用 Twin-PBL 和角鋼連接；預應力採用體內和體外混閤配束方案，確保維護方便。施工階段研究得齣：隨跨徑增大，施工位移增量對波形鋼腹闆加工呎吋影響顯著，加工時必鬚攷慮其影響；採用“懸臂桁車技術”保證瞭鋼腹闆起弔和安裝定位；採用先邊跨後中跨閤龍方案，確保瞭大橋順利閤龍。
도화욕황하대교과북대제교위（75＋135＋75） m 파형강복판련속상량교，대해교설계여시공관건기술진행연구。설계계단연구득출：여예응력혼응토련속상량교상비，파형강복판련속상량교구유경관효과호、항진성능호、시공효솔고등우점，학정해교채용파형강복판련속상량교；대비공정조개，학정고과비취1/18；채용유한원법분석횡격판수량대상량항뉴강도화기변적영향，학정중、변과분별설치8도、4도횡격판；대3충형식련접건진행시험연구，학정파형강복판여정、저판분별채용 Twin-PBL 화각강련접；예응력채용체내화체외혼합배속방안，학보유호방편。시공계단연구득출：수과경증대，시공위이증량대파형강복판가공척촌영향현저，가공시필수고필기영향；채용“현비항차기술”보증료강복판기조화안장정위；채용선변과후중과합룡방안，학보료대교순리합룡。
The North Embankment Bridge of Taohuayu Huanghe River Bridge is a (75 + 135 +75) m continuous box girder bridge with corrugated steel webs .The key design and construction techniques of the bridge were studied .The study into the design stage indicates that the continuous box girder bridge with corrugated webs is superior to the prestressed concrete continuous box gird -er bridge in terms of the aesthetic effect ,seismic performance and construction efficiency ,there-fore ,it is chosen for the bridge .For the sake of construction cost ,the ratio of the height of the corrugated webs to the span length adopts 1/18 .The finite element method was used to analyze the influence of amount of diaphragms on the torsional stiffness and distortion of the box girder .It was determined that eight and four diaphragms were set respectively for the intermediate and side spans .Three types of connectors were experimentally studied ,and by the results which the corru-gated steel webs were determined to connect to the top and bottom slabs respectively by Twin-PBL and angle steel .Moreover ,external and internal prestressing tendons were matched to ensure the convenience of future maintenance .The study into the construction stage indicates that as the span length increases ,the influence of the construction displacement increment on the machining dimen -sion of corrugate steel webs becomes more significant ,which should be taken into account during the process of fabrication .The lifting and installation position were carried through by using the "cantilever truss trolley technique" .To ensure the smooth closure of the bridge ,the scheme of clos-ing the side spans first and intermediate span later was adopted .
