Rapid Tracking of Pipe-Works Progress using Digital Photogrammetry

摘要

Pipe-works are among the complicated items to be tracked in the course of monitoring construction project progress. Traditionally, the tracking of pipe-works progress is conducted either manually or using laser scanning technology. Current automated techniques are expensive, not portable, take a relatively longer setup time before actual use, and cannot provide the richness and semantics of spatial information necessary for communication of the progress status as can real images and stereo-vision. In some cases it will not be the best cost effective solution to use laser scanners, especially, for the cases in which the working area under investigation is crowded with other workers, machines, and materials. This paper reports on a new 3D digital photogrammetry technology as a rapid alternative approach for pipe-works reconstruction and as a cost effective tracking tool. The data was mainly collected using a hand-held camera to acquire images inside a new building under construction in the campus of the University of Waterloo. The progress of the pipe-work networks of different types and sizes in the new E6-Building was monitored during its construction phases. In addition to the known accuracy and robustness of photogrammetry; it was found that the use of digital photogrammetry provided a practical and low-cost approach.