目 录

1、工程概况........................................................................................1

1.1 工程简介........................................................................................1

1.2 工程及施工特点.............................................................................1

1.3 编制依据........................................................................................2

2、施工总体部署.................................................................................3

2.1 总体目标........................................................................................3

2.2 施工段的划分.................................................................................3

2.3 施工组织与管理.............................................................................4

2.4 施工总进度计划.............................................................................5

2.5 施工准备........................................................................................5

2.6 施工阶段划分及内容......................................................................7

2.7 大临暂设规划.................................................................................7

2.8 施工供水供电.................................................................................8

2.9 施工临时征地.................................................................................8

3、主要施工技术要点..........................................................................9

3.1 长输管线施工工艺流程..................................................................9

3.2 测量放线........................................................................................9

3.3 管沟开挖......................................................................................10

3.4 管沟排水......................................................................................12

3.5 人工降水......................................................................................13

3.6 管沟支护......................................................................................15

3.7 管道砂垫层..................................................................................19

3.8 管材、管件及阀门入场检验.........................................................20

3.9 管道运输及吊装...........................................................................21

3.10 管道下沟....................................................................................21

3.11 管道组对....................................................................................22

3.12 焊接作业坑................................................................................23

3.13 管道焊接....................................................................................23

3.14 管道外防腐................................................................................30

3.14.1 管道外防腐.............................................................................30

3.14.2 补口及补伤.............................................................................33

3.15 管沟回填....................................................................................34

3.16 管道分段耐压试验.....................................................................35

3.17 管道内衬里................................................................................39

3.18 穿跨越工程................................................................................40

3.18.1 穿越河流施工方法...................................................................40

3.18.2 穿跨越公路施工方法...............................................................47

3.18.3 短距离顶管工艺......................................................................47

3.18.4 长距离顶管工艺......................................................................53

3.19 穿越管道的安装.........................................................................59

3.20 通水试验....................................................................................59

4、主要保证措施要点........................................................................60

4.1 质量保证措施...............................................................................60

4.2 施工进度保证措施.......................................................................61

4.3 成品保护措施...............................................................................61