中俄东线天然气管道工程一般段施工方案编制人： 审核人： 审定人： 目 录第一章 编制依据..................................................1第二章 工程概况.................................................2第三章 施工方案.................................................21 施工工艺流程....................................................22 主要工序施工技术措施............................................22.1 线路交桩......................................................22.2 测量放线......................................................32.3 施工便道.....................................................72.4 防腐管运输与保管............................................102.5 施工作业带清理...............................................192.6 布管.........................................................212.7 管口组对与焊接...............................................242.8 焊接.........................................................272.8.1 全自动焊焊接...............................................272.8.2 半自动焊焊接...............................................312.8.3 连头焊接..................................................342.8.4 返修焊接...................................................362.9 防腐补口、补伤...............................................382.9.1 补口作业空间施工方案......................................382.9.2 液体聚氨酯补口施工方案.....................................392.10 BK-1 机械化补口施工方案.....................................492.11 管沟开挖....................................................602.12 下沟........................................................642.13 回填、硅管敷设和地貌恢复....................................712.13.1 管沟小回填................................................712.13.2 硅管敷设..................................................712.13.3 大回填、地貌恢复..........................................722.14 水工保护....................................................732.14.1 浆砌石结构..............
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