【正文】 4 主要結(jié)構(gòu)介紹 ............................................................................. 4 工地連接 ..................................................................................... 6 主要材料 ..................................................................................... 7 涂裝體系 ..................................................................................... 7 二、工程內(nèi)容 ........................................................................................ 7 三、指導(dǎo)思想及編制原則 ...................................................................... 8 四、質(zhì)量目標(biāo) ........................................................................................ 9 五、編制依據(jù) ........................................................................................ 9 第二部分 鋼桁梁制造工藝方案 ............................................................... 12 一、鋼桁梁制造工藝方案概述 ............................................................. 12 1. 構(gòu)件類型及數(shù)量 ........................................................................ 14 2. 工程特點(diǎn)及工作部署 ............................................................... 16 3. 工藝布局 .................................................................................. 18 主要工藝分析及質(zhì)量控制 ........................................................ 22 重點(diǎn)、難點(diǎn)工藝分析及措施 ...................................................... 25 關(guān)鍵工藝項(xiàng)點(diǎn) .......................................................................... 29 檢驗(yàn)程序流程圖 ....................................................................... 31 二、施工準(zhǔn)備 ....................................................................................... 33 1. 技術(shù)準(zhǔn)備 .................................................................................. 33 ...................................................................................... 35 ...................................................................................... 36 ...................................................................................... 36 三．制作工藝 ....................................................................................... 37 零件的下料和加工 ..................................................................... 37 上弦桿制作工藝 ....................................................................... 41 下弦桿制作工藝 ........................................................................ 61 主桁斜桿（箱形桿件）制作工藝 .............................................. 70 主桁豎桿、斜桿（ H 形桿件）制作工藝 .................................... 77 主桁王形桿件制作工藝 ............................................................. 81 四、鐵路橋面系制作工藝 ..................................................................... 83 橫梁結(jié)構(gòu)簡介 ............................................................................ 84 橫梁的制作工藝 ........................................................................ 84 2 五、公路橋面系制作工藝 .................................................................... 86 混凝土橋面的公路橋面系構(gòu)造及工藝 ...................................... 86 鋼正交異性橋面的構(gòu)造 ............................................................. 86 鋼橋面制作工藝總體工藝流程 .................................................. 88 .................................................................. 89 六、試拼裝 ......................................................................................... 101 試裝的目的 .............................................................................. 101 試裝的主要作業(yè)內(nèi)容 ............................................................... 102 試裝的工藝流程 ...................................................................... 103 試裝的工藝要點(diǎn) ...................................................................... 103 試裝的技術(shù)措施 ...................................................................... 104 七、 構(gòu)件的存放與運(yùn)輸 .................................................................. 105 1. 構(gòu)件的運(yùn)輸 ............................................................................ 105 ............................................................................... 105 ............................................................. 105 八、 焊接規(guī)程 ................................................................................... 106 1. 焊工 ....................................................................................... 106 2. 焊接 材料 ................................................................................. 111 3. 焊接設(shè)備及器具 ...................................................................... 112 4. 焊接工藝評定 ........................................................................ 112 5. 焊接工藝規(guī)程（ WPS） ............................................................. 115 ................................................................................... 115 7. 焊接工藝要求 .......................................................................... 116 8. 焊縫返修 ................................................................................. 119 9. 焊接檢驗(yàn) ................................................................................. 120 九、 鋼桁梁制造關(guān)鍵技術(shù)應(yīng)用 ......................................................... 122 ............................................................. 122 下料技術(shù) ............................................................................. 122 ............................................................................ 122 ........................................................................ 123 ............................................................................ 123 ........................................................................ 123 ................................................................ 124 ..........................................