Development of 3d Information Models for the Maintenance of Subway Infrastructures

Maintenance of subway tunnels and stations is one of the most difficult areas because of limited allowed inspection time and complex environment surrounding the infrastructures. Congested urban buildings and underground facilities make the construction and renovation of subway infrastructures more troublesome. In this paper, 3D information models including geometry models and their related information were developed for the maintenance of subway systems. Information architectures considered current inspection items and required documentations. 3D models have previous inspection data and damage drawings for inspector’s convenience because inspectors have less than 4 hours at night. Mobile devices can utilize the developed models for inspectors due to wireless networks in underground tunnels. Inspected results are transmitted to the facility management system for the assessment of current status of subway structures. Newly proposed system significantly increases efficiency of the inspection and well organized data for the assessment of underground tunnels and stations. Owners of subway systems can utilize the data for the developing new requirements of new subway designs in order to reduce maintenance cost.