Method for evaluating cathode protection effect of pipeline supporting steel structure connecting piece in tunnel

The invention relates to a method for evaluating the cathodic protection effect of a pipeline supporting steel structure connecting piece in a tunnel, and belongs to the technical field of pipeline corrosion prevention, which comprises the following steps of: establishing a three-dimensional geometric model of the pipeline supporting steel structure connecting piece and a sacrificial anode in thetunnel; performing grid division on the three-dimensional geometric model, and determining discrete small units; carrying out cathode protection potential numerical solution by utilizing a boundary element method; and evaluating the cathode protection effect of the pipeline support steel structure connecting piece according to the solved cathode protection potential of each part of the pipeline support steel structure connecting piece. The cathode protection potential distribution of supporting steel structure connecting pieces such as pipe clamps and bolts in the tunnel is predicted, and theproblem of cathode protect