长江堤外 DN600/DN500 管道内衬 HDPE 修复工程施工方案岳阳岳化创源检修安装2012-11-05目 录1、主要施工方案..........................................................................................................................................3施工工艺概述..............................................................................................................................................3施工工艺流程..............................................................................................................................................5测量放线.....................................................................................................................................................51.4.操作坑开挖............................................................................................................................................5管线断管.....................................................................................................................................................7管线内窥探测..............................................................................................................................................7管焊接.........................................................................................................................................................71.9 HDPE 管压缩穿插..............................................................................................................................10．PE 法兰焊接..........................................................................................................................................11．管线的连接............................................................................................................................................111.12.操作坑回填及附属物的安装............................................................................................................112、施工工期....................................................
