重庆融侨大道螺旋桥工程预应力施工方案.docx
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重庆融侨大道螺旋桥工程预应力施工方案.docx
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重庆融侨大道螺旋桥工程预应力施工方案
中国建筑工业出版社筑龙网SINOAEC.COM
重庆融侨大道螺旋桥工程
预应力施工方案
编制单位:
中国建筑第三建设工程有限责任公司
编制人:
胡骞刘双友
【评语】该方案针对性强,技术特点描述清楚、详细,
工艺过程清晰,各种措施到位,指导性强。
不足之处是第五部分的质量保证措施中将本分项工程
质量定为优良,但采用的验收标准《混凝土结构工程施工及
验收规范》(GB50204-2002)并未对优良等级进行划分。
既
然定为优良,应有相应标准。
中国建筑工业出版社筑龙网SINOAEC.COM
中国建筑第三工程局融侨大道道路及排水工程预应力施工方案
第1页
1工程概况......................................................................................................................................3
1.1工程简介................................................................................................................................3
1.2主要技术标准.........................................................................................................................3
1.3主要工程项目及数量.............................................................................................................4
2施工总体计划...............................................................................................................................4
2.1本工程预应力施工的特点和难点.........................................................................................4
2.2计划投入本工程的主要施工机械、设备及试验仪表........................................................5
2.3计划投入本工程的人员........................................................................................................6
2.4计划投入本工程的材料........................................................................................................6
2.5材料采购要求........................................................................................................................7
2.5.1钢绞线..............................................................................................................................7
2.5.2波纹管..............................................................................................................................7
2.5.3锚具.................................................................................................................................7
2.5.4水泥浆..............................................................................................................................8
2.6施工前期准备工作................................................................................................................8
3主要施工方法.............................................................................................................................10
3.1全桥总体预应力张拉顺序...................................................................................................10
3.1.1张拉顺序流程图...........................................................................................................10
3.1.2张拉顺序说明...............................................................................................................11
3.2盖梁预应力工程...................................................................................................................11
3.2.1盖梁设计参数................................................................................................................11
3.2.2盖梁预应力参数............................................................................................................12
3.2.3盖梁钢束几何要素和布管坐标....................................................................................12
3.2.4盖梁预应力施工顺序...................................................................................................15
3.3单支座横隔梁预应力施工...................................................................................................16
3.3.1单支座中横隔梁设计参数............................................................................................16
3.3.2单支座中横隔梁预应力参数........................................................................................17
3.3.3单支座中横隔梁钢束几何要素和布管坐标................................................................17
3.3.4单支座中横隔梁预应力施工顺序...............................................................................18
3.4箱梁预应力工程...................................................................................................................19
3.4.1连续箱梁4×33.652m...................................................................................................21
3.4.2连续箱梁4×28.348m...................................................................................................21
3.4.3连续箱梁33.652+38.618+33.652m.............................................................................22
3.4.4连续箱梁28.348+32.532+28.348m.............................................................................23
3.4.5连续箱梁33.652+38.859+34.446+35+31m.................................................................24
3.4.6连续箱梁28.348+32.76+35.554+35+31m...................................................................25
3.4.7箱梁预应力施工中的难点...........................................................................................26
3.4.8箱梁预应力施工方法...................................................................................................28
3.4.9箱梁预应力施工顺序...................................................................................................28
3.5施工操作要点.......................................................................................................................30
3.5.1预应力筋的下料和穿束................................................................................................30
3.5.2孔道安装定位................................................................................................................30
中国建筑工业出版社筑龙网SINOAEC.COM
中国建筑第三工程局融侨大道道路及排水工程预应力施工方案
第2页
3.5.3张拉预埋件的安装........................................................................................................31
3.5.4混凝土浇筑....................................................................................................................31
3.5.5预应力钢束的张拉........................................................................................................32
3.5.6孔道压浆........................................................................................................................33
3.5.7封锚...............................................................................................................................34
3.5.8施工中可能出现的问题及处理方法............................................................................34
4施工计划进度安排.....................................................................................................................35
4.1盖梁预应力施工工期安排(按一根盖梁考虑)...............................................................35
4.2箱梁预应力施工工期安排(按一幅箱梁考虑)...............................................................35
4.3横隔梁预应力施工工期安排(按一幅箱梁考虑)...........................................................36
5质量保证措施.............................................................................................................................36
6安全保证措施.............................................................................................................................36
7文明施工措施.............................................................................................................................37
8其他应明确的事项.....................................................................................................................37
附录一箱梁预应力孔道摩阻测定.............................................................................................38
1.试验目的...............................................................................................................................38
2.试验设备...............................................................................................................................38
3.试验依据...............................................................................................................................38
4.试验方法...............................................................................................................................38
5.测试步骤...............................................................................................................................39
6.试验数据计算整理…………………………………………………………………………41
7.记录试验结果(见附表)....................................................................................................41
附录二真空灌浆施工方法.........................................................................................................43
1概述........................................................................................................................................43
1.1简介.................................................................................................................................43
1.2HDPE塑料波纹管的优点...............................................................................................43
1.3真空辅助灌浆的优点......................................................................................................43
1.4采用螺杆式灰浆泵的优点..............................................................................................44
2施工工艺................................................................................................................................44
2.1真空辅助压浆系统图......................................................................................................44
2.2本工程真空灌浆主要设备和仪器...................................................................................45
2.3本工程真空灌浆主要材料...............................................................................................46
2.4施工步骤...........................................................................................................................46
2.5注意事项..........................................................................................................................47
中国建筑工业出版社筑龙网SINOAEC.COM
中国建筑第三工程局融侨大道道路及排水工程预应力施工方案
第3页
1工程概况
1.1工程简介
重庆融侨大道工程位于重庆市南岸区铜元局长江电工厂厂区内,
设计为为双层螺旋式坡道桥,一端通往海铜路至铜元局,另一端通往
南坪明佳路。
本工程桥长643.885m,桥宽19m,平面曲线半径55m,设计荷
载城-A级,桥面宽2×9.39m,双向四车道。
采用预应力混凝土连续
箱梁结构,横截面为抗扭刚度大的分离式双箱单室结构。
单箱单室桥
宽9.39m,梁高1.8m,翼缘悬臂长度2.445m,箱梁顶板厚0.25m,底
板厚0.2m,腹板厚0.4m。
全桥由0~4号(4×31m)、4~7号(31+35.575
+31m)、
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