INSPECTION METHOD OF CONSTRUCTION PIPE

摘要

PROBLEM TO BE SOLVED: To provide an inspection method of a construction pipe capable of easily inspecting the presence of an open hole 13 caused by corrosion of an existing pipe 11 in a construction pipe constructed by a PIP construction method.SOLUTION: With an inspection method, a construction pipe is inspected that is constructed by a construction method in which an interpolation tube 12 is inserted inside of the existing pipe 11 buried underground and a grout material is filled between the two pipes. Between the existing pipe 11 and an auxiliary electrode 5 for energization buried in the embedded earth, a DC current is applied by repeating of ON and OFF. Then, a current value between the existing pipe 11 and the interpolation tube 12 is measured. From results of measuring the current value, the presence of the open hole 13 in the existing pipe 11 is detected.