Abstract
In this report the crack evaluation system for analyzing the condition of superannuated tunnels is discussed. This system is based on analysis of continuous image recording of tunnel walls. The system is characterized as follows:
1) It enables quick and objective investigation;
2) Personal computer are adequate for the image recording, processing, and analysis;
3) It aims to provide for the structuring of an expert system for finding causes of deformation.
In applications of the system we found that analysis of crack elements was useful in finding the causes of deformation.
