Utilisation of a New Terrestrial Scanner for Reconstruction of As-Built Models: A Comparative Study

Abstract

Recent studies show a great potential of improving construction productivity through using real-time applications to measure change orders and other objects to create as-built. As an enhancement to this promising concept, this paper presents the process of implementation of an efficient framework for as-built Building Information Modelling (BIM) using a new Scan Station that enables contractors to acquire accurate data and create and update the asbuilt models. A novel framework designed and assisted in the conversion of the raw 3D point cloud data from a laser scanner positioned at multiple locations of a facility into a compact and semantically rich model. The result of the study was compared with two other as-built models using mobile and terrestrial lidar scanners to understand the capability of each for building information modelling. It was found that the framework using the new Scan Station has a great potential to collect accurate data that can be transferred to BIM for creating as-built models. The results show that the accuracy of fine objects' dimensions varies from -2% to +2%. The comparison of the test results with our previous experiments using different scanners shows that every scanner has its own advantage for each job in construction.

Challenges and Opportunities for Implementation of Laser Scanners in Building Construction

“…Thereafter, both processed mobile and terrestrial lidar data sets were imported and processed into Autodesk Revit and converted within the program into a compatible format. Extending previous work [22,24,26], the examples of initial results are shown in Figure 4. Two segmented components: wall (including windows and an opening) and a section of stairs of the sample C4 were modelled.…”

“…The paper attempts to identify the challenges and opportunities of using the employed scanners and positioning systems by utilizing the scanners to create more accurate as-built with low skill labor in a shorter time. Based on the literature and previous work [22,24,26], the overall process for asbuilt creation is proposed consisting of scanning, processing, and creation [22]. In addition, the algorithm and feature of the new hand-held mobile scanners which are used in this paper dictated the procedure to follow to create the information modelling.…”

Closure to “Evaluation of Terrestrial and Mobile Scanner Technologies for Part-Built Information Modeling” by Samad M. E. Sepasgozar, Perry Forsythe, and Sara Shirowzhan

“…Based on our experience in point cloud data acquisition and analyses, fundamental knowledge of 3D spatial data is required for understanding the process of data collection and analysis (Sepasgozar et al 2015;Shirowzhan et al 2016Shirowzhan et al , 2018aShirowzhan et al , b, 2019. We refer to Fig.…”

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“…If managers provide the technology, but users of their organizations hesitate to use it or reject it, the technology adoption process will fail. For example, a wide range of cutting edge technologies such as laser scanners are available to professions [1][2][3][4]. However, it is reported that there are barriers to use these technologies in construction sites present the initial results of are search project to give an understanding of the processes, different sources of information and the critical factors that professional organizations are affected, when purchasing advanced technologies [5][6][7][8].…”