Bidirectional interaction between BIM and construction processes using a multisource geospatial data enabled point cloud model

Building Information Modeling (BIM) has increasingly been adopted as an as-planned construction state to provide essential support for fine construction. However, some deviations are inevitably induced between the BIM model and actual construction states in practical construction processes, and these deviations obstruct the unidirectional interaction between the BIM model and actual construction states, thus seriously degrading the fine construction quality. This paper proposes a bidirectional interaction mechanism between BIM and construction processes using a multisource geospatial data enabled point cloud model. In the forward interaction, parametric BIM model are obtained to provide essential information for fine construction. Particularly, a multisource geospatial data enabled point cloud modeling strategy is the core of the proposed method, which overcomes complex buildings characterized by severe occlusions, specular surfaces and similar components to capture accurate and complete 3D point cloud model that reflects the actual construction state. In the backward interaction, the point cloud model provides feedback to adjust the BIM model for ensuring a fit between the BIM model and actual construction state. Moreover, the resulting up-to-date BIM model can further instruct the subsequent construction processes; thus, BIM and construction become a closed task-oriented loop. The proposed method was applied to the curtain wall construction of the main stadium for the Chengdu 2022 31st Summer World University Games and compared with four other state-of-the-art point cloud registration methods. The results demonstrated the superior accuracy of our method over other methods. The results also showed that the proposed method could effectively maintain the interaction between the BIM model and actual construction states throughout the construction lifecycle and ensure the quality of fine construction.