Determination method of highway tunnel inverted arch quality defect degree

The invention relates to a determination method of a highway tunnel inverted arch quality defect degree, and belongs to the technical field of highway engineering. A tunnel inverted arch is subjected to quality detection, and detection is performed by adopting a damage-free detection method; the initial steel supporting arch frame interval, a steel arch frame embedded depth and an inverted arch concrete compactness are detected; then, the detection results are subjected to classified determination, and four combinations of AAA, AAB, ABB and BBB are obtained; the obtained combinations are subjected to qualitative examination, and meanwhile a proper treatment measure is selected on the basis of the qualitative result. The inverted arch defect classification is performed, detection of the tunnel inverted arch defect can be rapidly completed, disease factors are conveniently determined, corresponding countermeasures can be adopted on the severity of the determined defect level, the method can suit the remedy to t