Application of Photogrammetry in Wear Detection for Shield Cutters
(1 Department of Geotechnical Engineering, Tongji University, Shanghai 200092; 2 Key Laboratory for Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092; 3 School of Geodesy and Geomatics, Wuhan University, Wuhan 430079; 4 CCCC Tunnel Engineering Co. Ltd., Beijing 100088)
Abstract：
Cutter wear is a key problem that affects construction quality and the progress of shields due to the high-risk, high-cost and long operation period of hyperbaric intervention. Aiming at the disadvantages of common detection methods, such as high risk, poor effects and low accuracy, and combined with the characteristics of slurry shield tunnelling, this paper proposes a new visualized detection method for shield cutters based on the development of photogrammetry technology. By using this new method, image data of shield cutters may be collected during construction via a video camara calibrated by a 3D control field. With directed operation of the precise 3D shield model, a quantitative detection can be conducted in terms of cutter wear conditions by utilizing the 3D visualized platform and image analysis, thus making possible the virtual integrated display and digital evaluation of cutter wear.
2015, Vol. 52 