城阳区xxxx天桥工程人行天桥施工方案二0一七年九月第1页目录第一章:编制依据及工程概况...................................................................................................................................2一、施工依据...........................................................................................................................................................2二、编制原则...........................................................................................................................................................3三、技术规范...........................................................................................................................................................3四、工程概况:.......................................................................................................................................................3第二章:构件制作分段情况.......................................................................................................................................4一、天桥分段...........................................................................................................................................................4三、分段立面及胎架...............................................................................................................................................6四、每段重量...........................................................................................................................................................6第三章:现场吊装及部署...........................................................................................................................................7一、施工特点...........................................................................................................................................................7二、施工难点...........................................................................................................................................................7三、施工关键...........................................................................................................................................................7四、吊装具体部署...................................................................................................................................................8五、现场拼装及桥上安保措施.............................................................................................................................17六、钢箱梁焊接技术措施.....................................................................................................................................18(一)焊接部署及工艺准备.................................................................................................................................18(二)焊接施工顺序和要求.................................................................................................................................20(三)焊接施工中质量管理.................................................................................................................................21(四)焊接应力控制.............................................................................................................................................22(五)焊接工艺评定.......