







摘 要:鋼箱梁因其跨徑大、工廠化機械制造效率高、可靠性高等優點在城市立交橋和跨線橋中被廣泛采用,然而受現場施工條件、大節段運輸困難和易變形等因素影響,分節段制造及精確定位拼裝控制變形和減小焊接誤差成為這類鋼箱梁廠內加工的重點。該文結合石家莊市北片區南水北調大橋項目,對大跨徑變截面鋼箱梁加工技術展開研究,并研制出鋼箱梁廠內加工仿真預拼裝裝置,有效控制梁段制作的尺寸誤差,提高現場施工效率,可為類似的大跨徑邊界鋼箱梁廠內加工拼裝項目提供借鑒和參考。
關鍵詞:大跨徑變截面鋼箱梁;節段制造;預拼裝;加工技術;加工拼裝項目
中圖分類號:U445 文獻標志碼:A 文章編號:2095-2945(2024)31-0176-05
Abstract: Steel box girders are widely used in urban overpasses and flyovers because of their long span, high efficiency of factory machinery manufacturing, and high reliability. However, due to factors such as on-site construction conditions, transportation difficulties of large segments and easy deformation, segment manufacturing and precise positioning and assembly to control deformation and reduce welding errors have become the focus of in-factory processing of such steel box girders. Based on the South-to-North Water Diversion Bridge Project in the North Area of Shijiazhuang City, this paper studies the processing technology of long-span variable cross-section steel box girders, and develops a steel box girder in-factory processing simulation pre-assembly device, which effectively controls the size error in beam section fabrication, improves on-site construction efficiency, and can provide reference for similar long-span boundary steel box girder in-factory processing and assembly projects.
Keywords: long-span variable cross-section steel box girder; segment manufacturing; pre-assembly; processing technology; processing and assembly project
鋼箱梁橋作為一種重要的鋼結構橋梁形式,在我國的城市建設和基礎設施建設中扮演著重要角色。隨著我國鋼材生產總量位居世界首位,鋼箱梁橋也迎來了良好的發展機遇。鋼箱梁橋的制造方法經歷了鉚接、栓焊和全焊3個階段的演變,這些技術的不斷發展和改進為鋼箱梁的制造提供了更高效、更精密的工藝手段。從20世紀60年代起,鋼箱梁的加工工藝技術逐步由傳統的鉚接轉變為人工焊接和栓接,同時采用火焰數控精密切割、數控機床鉆孔等先進技術逐步取代傳統工藝,提高了生產效率和產品質量。鋼箱梁的制造工藝主要分為切割、組裝、焊接、矯形、鉆孔、除銹、涂油和栓接面處理等環節[1]。
王鵬飛等[2]以福建沙埕灣跨海大橋為背景,優化自動化生產線的制造工藝,將扁平鋼箱梁的制作工藝引到現代化道路上。……