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发明公开
CN101761729A 非开挖施工大口径管道腐蚀控制联合施工方法 无效 - 驳回

非开挖施工大口径管道腐蚀控制联合施工方法
摘要：
非开挖施工大口径管道腐蚀控制联合施工方法，采用管道外壁涂层防护+牺牲阳极阴极保护的联合防腐蚀方案进行管道腐蚀控制；管道外壁涂层防护性能要求达到相应指标。所述阴极保护为预先施工安装在管道上的馈电装置(113)在非开挖施工大口径顶管管线(1)附近埋设与之电连接的牺牲阳极保护装置(3)；当局部保护电位达不到保护电位或者管道局部出现杂散电流干扰时，直接利用注浆孔作为安装孔或者临时在非开挖施工大口径顶管管线(1)上钻孔获得的安装孔将牺牲阳极保护装置(3)固定连接在非开挖施工大口径顶管管线(1)上。本发明在现场保证管道顶管施工的持续性；解决了现有技术中顶管施工管道外壁腐蚀控制的技术难题。
摘要（英）：

The invention discloses a trenchless construction large-diameter pipeline corrosion control joint construction method, which controls the corrosion of a pipeline through a joint anti-corrosion scheme with pipeline outer wall coating protection and anodic-cathode sacrifice protection; and the protection performance of the pipeline outer wall coating meets corresponding index. The cathode protection is as follows: a feed device (113) which is perversely installed on the pipeline embeds an anodic sacrifice protection device (3) near a trenchless construction large-diameter top pipeline (1); and the anodic sacrifice protection device (3) is fixedly connected with the trenchless construction large-diameter top pipeline (1) through an injected hole which is directly taken as an installation hole or the installation hole which is temporarily drilled on the trenchless construction large-diameter top pipeline (1) when local protective potential can not reach the protective potential or the pipeline has stray current interference. The method guarantees the constancy of the pipeline top construction on the spot, and solves the problem of controlling the corrosion at the outer wall of the top construction pipeline in the prior art.

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