THREE-DIMENSIONAL VISUALIZATION AND DAMAGE COMMUNICATION SYSTEM FOR UTILITY TUNNELS

Abstract

 Many utility tunnels were constructed during the period of rapid economic growth. There is a need for appropriate maintenance management to ensure their longevity. The damage information for maintenance is managed through documentation and photographs. However, the interiors of utility tunnels often have similar structures, making it difficult for inspectors to identify the locations of damage. Moreover, there is currently no support system to assist this challenge. This study aims to develop a system for accurately identifying damage locations in utility tunnel inspections and enhancing the communication of damage information. Multiple measurement instruments were used to measure the utility tunnels and construct 3D point cloud data. The utility tunnels were visualized using 3D data and 2D maps. The damage location and type were indicated through the 3D data, while the condition of the damage was shown using omnidirectional images. The proposed system was evaluated by inspection engineers and suggested the capability of the system.