朱家纸厂双线大桥连续梁刚构专项施工方案.docx

朱家纸厂双线大桥连续梁刚构专项施工方案.docx

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朱家纸厂双线大桥连续梁刚构专项施工方案

新建铁路郑州至万州线重庆段站前工程ZWCQZQ-1标段

朱家纸厂双线大桥

连续梁—刚构专项施工方案

中铁二局工程有限公司·郑万铁路重庆段土建1标项目经理部

二〇一七年五月²重庆巫山

新建铁路郑州至万州线重庆段站前工程ZWCQZQ-1标段

朱家纸厂双线大桥

连续梁—刚构专项施工方案

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中铁二局工程有限公司郑万铁路重庆段土建1标项目经理部

二〇一七年二月

1编制说明................................................................................................................................7

1.1编制依据.........................................................................................................................7

1.2编制范围.........................................................................................................................7

1.3编制原则.........................................................................................................................8

2工程概况................................................................................................................................8

2.1工程地理位置.................................................................................................................8

2.2施工环境概况.................................................................................................................8

2.2.1地形地貌..................................................................................................................8

2.2.2水文环境..................................................................................................................9

2.2.3气象条件..................................................................................................................9

2.2.4地质构造及地震环境..............................................................................................9

2.2.5主要设计技术标准..................................................................................................9

2.3设计结构.........................................................................................................................9

3工程重、难点分析..............................................................................................................14

3.1施工重点.......................................................................................................................14

3.3施工难点.......................................................................................................................14

4施工计划..............................................................................................................................14

4.1工期进度计划...............................................................................................................14

4.2主要机械设备配置计划...............................................................................................14

4.3材料计划.......................................................................................................................15

4.4现场主要人员配置.......................................................................................................16

5总体施工方案......................................................................................................................16

6施工方案及方法..................................................................................................................17

6.1施工准备.......................................................................................................................17

6.1.1技术准备工作.........................................................................................................17

6.1.2合同交底及图纸会审............................................................................................17

6.1.3施工测量................................................................................................................17

6.1.4试验方案................................................................................................................18

6.1.5主要物资供应方案................................................................................................18

6.1.6主要临时设施........................................................................................................18

6.20#块托架施工................................................................................................................18

6.2.1托架设计.................................................................................................................19

6.2.2托架安装.................................................................................................................21

6.2.3托架预压方案.........................................................................................................21

6.30#块施工........................................................................................................................22

6.3.10#块模板施工.........................................................................................................22

6.3.20#块钢筋施工.........................................................................................................23

6.3.30#块混凝土施工.....................................................................................................27

6.3.4预应力施工............................................................................................................30

6.3.5托架模板拆除........................................................................................................36

6.4挂篮设计、加工、试验及运行...................................................................................37

6.4.1挂篮设计..............................................................................................................37

6.4.2挂篮加工及拼装....................................................................................................41

6.4.3挂篮预压................................................................................................................42

6.4.4挂篮施工注意事项................................................................................................44

6.5挂篮悬臂现浇段施工方案及方法...............................................................................45

6.5.1结构设计概况........................................................................................................45

6.5.2施工流程................................................................................................................45

6.5.3模板设计与施工....................................................................................................46

6.5.4钢筋及预应力管道施工........................................................................................49

6.5.5混凝土施工.............................................................................................................51

6.5.6悬浇施工过程的质量管理与控制........................................................................51

6.6中合龙段施工................................................................................................................52

6.6.1施工工艺流程........................................................................................................52

6.6.2合龙段支架及模板................................................................................................53

6.6.3内模安装................................................................................................................53

6.6.4体外型钢支撑安装................................................................................................54

6.6.5钢筋施工................................................................................................................54

6.6.6预应力束张拉........................................................................................................54

6.6.7合龙段混凝土浇筑.................................................................................................54

6.7边跨直线段施工...........................................................................................................55

6.7.1施工工艺流程........................................................................................................55

6.7.2支架设计................................................................................................................55

6.7.3模板设计及施工.....................................................................................................56

6.7.4边跨直线段混凝土浇筑.........................................................................................57

6.8挂篮、托架及支架拆除方案.......................................................................................58

6.8.1挂篮拆除................................................................................................................58

6.8.2支架及托架拆除....................................................................................................58

6.9合龙段施工要点...........................................................................................................59

6.10“四电”及附属工程相关预埋件施工.....................................................................59

6.10.1安装要求..............................................................................................................59

6.10.2焊接要求..............................................................................................................60

6.11支座的安装.................................................................................................................60

6.12公路防护.....................................................................................................................62

7线性监控..............................................................................................................................62

7.1线性监控目的和目标....................................................................................................62

7.3线性监控的方法...........................................................................................................62

7.4线性监控的体系...........................................................................................................63

7.5线性监控的测量........................................................................................