Abstract
Conventional measurement technologies of transportation infrastructures consist of discrete surveys which can be inconvenient in practice. Furthermore, data obtained using these methods are restricted to several points (or elements) placed on the observed structures. Modern survey techniques—for example, terrestrial laser scanning (TLS) and photogrammetric—allow for the surveying of quasi-continuous surfaces of examined structures. The examined object is an historic cast-iron suspension bridge in Ozimek (south of Poland). The bridge was constructed in 1825–1827 and constitutes the oldest European bridge of this type. The surveys were conducted using TLS and digital photogrammetric techniques. The data obtained were compared with traditional survey results (reference data) and the project. The achieved effects of the measurements show that the discrepancies between the applied techniques (TLS and photogrammetry) and reference methods varied only within several millimeters and can be regarded as satisfactory. Better compliance was obtained for TLS than photogrammetry. The main benefits of the applied techniques include reducing time in the field and obtaining a three-dimensional model of the structure that has satisfactory accuracy.
Highlights
Introduction and BackgroundInventory and control surveys are ordinarily conducted on transportation infrastructures to validate design assumptions and/or diagnostic examinations to guarantee exploitation safety and/or suitable modernization [1,2,3,4,5]
This paper examines the use of terrestrial laser scanning (TLS) and photogrammetric techniques on a historic cast-iron bridge
Taking into account the obtained measuring results of an historic cast-iron bridge using various techniques (TLS, digital photogrammetric and traditional survey), the following conclusions can be made: 1. The obtained measuring results of different structural bridge components using applied techniques prove that they are adequate for control and conservation works on structures with a complicated shape with difficult access
Summary
Inventory and control surveys are ordinarily conducted on transportation infrastructures (bridges, retaining walls, embankments, etc.) to validate design assumptions and/or diagnostic examinations to guarantee exploitation safety and/or suitable modernization [1,2,3,4,5]. Photogrammetric and terrestrial laser scanning (TLS) techniques seem to be very good alternatives to traditional inventory and conservation tools Such methods are very useful thanks to advanced measurement tools and the possibility of computer visualization of the obtained results [9,10,11,12,13,14,15]. The TLS and photogrammetric techniques provide the opportunity to obtain a point cloud [11,16,24,28,29,30]; they can be efficiently applied in the inventory and maintenance of objects (including historic)—in particular, those with difficult access This can be interpreted as a kind of reverse engineering. This paper examines the use of TLS and photogrammetric techniques on a historic cast-iron bridge This bridge structure is quite complex and difficult to measure using traditional methods. The methods used enable the collection of information about the actual dimensions of the bridge structure with sufficient accuracy
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
