Comparative analysis of the effectiveness of methods for evaluating completed construction work using a point cloud

The large-scale use of digital capabilities of laser scanning technology at the stages of the life cycle of a construction facility is limited by a number of reasons, among which it is possible to note the lack of technological methods for processing laser scanning results with the subsequent transformation of the resulting point cloud into a digital executive model. The article considers the foreign and domestic experience of practical use of point clouds at the stage of construction of a construction object, with the possibility of verifying the volume of completed work based on a digital information model. Based on the results of a comparative analysis using the example of the load-bearing skeleton of a building made in the executive and design information models, a general disadvantage of known methods for creating and determining the volume of work performed based on point clouds was identified. The article proposes a solution that eliminates the discovered flaw. The advantages of the proposed method are shown, in comparison with the known ones, using the example of determining the volume of a monolithic reinforced concrete wall of a civil building. A discrepancy was revealed in the assessment of the completed volumes of the structure obtained using various methods. The proposed method of calculating volumes using a point cloud makes it possible to increase the transparency of management at the stages of the life cycle of a construction facility, ensures a more rational distribution of material and labor resources, improves the quality of construction control, as well as the reliability of executive documentation. 

assessment method, laser scanning, building structure, point cloud, as-built digital model, actual scope of work, tessellation network