The corrosion protection problems of shield tunnel pipelines have always been ignored. In this paper, by investigating the corrosion and protection status of 5 shield tunnel pipelines, the corrosion situation of shield tunnel facilities (such as hot-bending bends, straight pipe sections and joint coating, and pipeline steel components of shield tunnels) was analyzed. It was clarified that mechanical damage during the installation of hot-bending elbows was an important source of damage to the anti-corrosion layer. The joint coating method of viscoelastic body and heat shrinkable tape can effectively reduce the risk of joint coating failure, and the sacrificial anodes can inhibit the corrosion of pipeline steel components. By analyzing the current corrosion problems that impact shield tunnel pipelines, one can consider corrosion prevention countermeasures in the overall shield tunnel pipeline design.

Subject
Water, Materials, Piping, Cathodic protection, Tape, Pipelines, Field joint coatings, Fusion bonded epoxy coating, Joints, Coating damage, Tunnels, Corrosion protection, Three-layer polyethylene coating
Keywords:
Shield tunnel, Pipeline, Corrosion and protection, Coating, Cathodic protection
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2022
Association for Materials Protection and Performance (AMPP)
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