铁道科学与工程学报
鐵道科學與工程學報
철도과학여공정학보
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
2015年
3期
496-501
,共6页
高速铁路%混凝土拱桥%劲性骨架%控制网%施工控制
高速鐵路%混凝土拱橋%勁性骨架%控製網%施工控製
고속철로%혼응토공교%경성골가%공제망%시공공제
high speed railway%concrete arch bridge%stiff skeleton%control network%construction control
沪昆客专北盘江特大桥为主跨445 m 的上承式钢筋混凝土拱桥，采用钢管混凝土劲性骨架法施工。该桥劲性骨架结构复杂，工艺流程多，作业难度大（高空300 m），安装节段多（40节段），悬臂长度长（222．5 m）。通过布设严密的控制网，实施合理的劲性骨架施工方案，通过劲性骨架工艺过程控制及浇筑过程中的应力及线形控制，实现劲性骨架的顺利施工。从原材料采购下料，单元件加工、组拼、胎架预拼及架设安装等各个环节严格把控，以实现成拱后线形、结构应力及焊缝质量均符合设计及要求。研究成果对同类型桥梁施工提供参考和借鉴。
滬昆客專北盤江特大橋為主跨445 m 的上承式鋼觔混凝土拱橋，採用鋼管混凝土勁性骨架法施工。該橋勁性骨架結構複雜，工藝流程多，作業難度大（高空300 m），安裝節段多（40節段），懸臂長度長（222．5 m）。通過佈設嚴密的控製網，實施閤理的勁性骨架施工方案，通過勁性骨架工藝過程控製及澆築過程中的應力及線形控製，實現勁性骨架的順利施工。從原材料採購下料，單元件加工、組拼、胎架預拼及架設安裝等各箇環節嚴格把控，以實現成拱後線形、結構應力及銲縫質量均符閤設計及要求。研究成果對同類型橋樑施工提供參攷和藉鑒。
호곤객전북반강특대교위주과445 m 적상승식강근혼응토공교，채용강관혼응토경성골가법시공。해교경성골가결구복잡，공예류정다，작업난도대（고공300 m），안장절단다（40절단），현비장도장（222．5 m）。통과포설엄밀적공제망，실시합리적경성골가시공방안，통과경성골가공예과정공제급요축과정중적응력급선형공제，실현경성골가적순리시공。종원재료채구하료，단원건가공、조병、태가예병급가설안장등각개배절엄격파공，이실현성공후선형、결구응력급한봉질량균부합설계급요구。연구성과대동류형교량시공제공삼고화차감。
Beipanjiang Extra -large Bridge of Shanghai -Kunming high -speed railway is a reinforced concrete deck arch bridge and the main span of it is 445m.The steel tube concrete strengthening framework construction method is adapted to construct the bridge.The stiff skeleton method consist of complicate structure,multi -process,difficult operation (the operation site is 300m above),many installation segment sections (40),long cantilever length (222.5 m).Strict control network was arranged and reasonable construction scheme of skeleton was implemented.To realize well -off construction,strong skeleton procedure control,stress control and geo-metric control were applied.The construction control of Beipanjiang extra -large bridge range from raw material procurement to the procedure of unit parts processing,matching,installing,etc and each link was strictly con-trolled according to the requirement.Besides,the structure stress and weld testing are all meet the design re-quirements.The construction and control technique can be useful for the construction of this type bridge.
