螺旋桥工程预应力施工方案.doc

&&****螺 旋 桥 工 程预 应 力 施 工 方 案编制单位：&&**建设工程有限责任公司编 制 人：*************【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　目录1 工程概况.......................................................................................................................................31.1 工程简介.................................................................................................................................31.2 主要技术标准.........................................................................................................................31.3 主要工程项目及数量.............................................................................................................42 施工总体计划...............................................................................................................................42.1 本工程预应力施工的特点和难点.........................................................................................42.2 计划投入本工程的主要施工机械、设备及试验仪表 ........................................................52.3 计划投入本工程的人员........................................................................................................62.4 计划投入本工程的材料........................................................................................................62.5 材料采购要求........................................................................................................................72.5.1 钢绞线..............................................................................................................................7 2.5.2 波纹管..............................................................................................................................7 2.5.3 锚具..................................................................................................................................72.5.4 水泥浆..............................................................................................................................8 2.6 施工前期准备工作................................................................................................................83 主要施工方法.............................................................................................................................103.1 全桥总体预应力张拉顺序 ...................................................................................................103.1.1 张拉顺序流程图...........................................................................................................103.1.2 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............................................................................................................123.2.3 盖梁钢束几何要素和布管坐标....................................................................................123.2.4 盖梁预应力施工顺序...................................................................................................153.3 单支座横隔梁预应力施工 ...................................................................................................163.3.1 单支座中横隔梁设计参数............................................................................................163.3.2 单支座中横隔梁预应力参数........................................................................................173.3.3 单支座中横隔梁钢束几何要素和布管坐标................................................................173.3.4 单支座中横隔梁预应力施工顺序 ...............................................................................183.4 箱梁预应力工程...................................................................................................................193.4.1 连续箱梁 4×33.652m ...................................................................................................213.4.2 连续箱梁 4×28.348m ...................................................................................................213.4.3 连续箱梁 33.652+38.618+33.652m .............................................................................223.4.4 连续箱梁 28.348+32.532+28.348m .............................................................................233.4.5 连续箱梁 33.652+38.859+34.446+35+31m.................................................................243.4.6 连续箱梁 28.348+32.76+35.554+35+31m...................................................................253.4.7 箱梁预应力施工中的难点...........................................................................................263.4.8 箱梁预应力施工方法...................................................................................................283.4.9 箱梁预应力施工顺序.............。