Steel bar construction monitoring method based on three-dimensional laser scanning and BIM technology

The invention discloses a steel bar construction monitoring method based on a three-dimensional laser scanning and BIM technology, and the method comprises the steps: dividing steel bar construction into a plurality of scanning stages, employing a three-dimensional laser scanner to carry out the stage scanning of steel bars in construction, and obtaining the point cloud data of each stage; importing the point cloud into professional processing software for processing, and establishing a point cloud data model; for arrangement of the reinforcing steel bars, building a building information model of concrete and the reinforcing steel bars of the structure by utilizing a family library function of the BIM software; the steel bar point cloud data model and the steel bar building information model are compared, whether the steel bar construction precision meets the standard requirement or not is checked, corresponding adjustment is conducted, and therefore the steel bar construction precision is improved. And meanw