In-tunnel survey lofting system and method based on BIM and point cloud model

The invention discloses a BIM (Building Information Modeling) and point cloud model-based in-tunnel survey lofting system, and relates to the technical field of tunnel survey, the BIM and point cloud model-based in-tunnel survey lofting system comprises a tunnel wall and a bearing plate connected with a foot stool, a three-dimensional laser scanner is arranged at the top of the foot stool, and an automatic total station is arranged on the upper surface of one side of the three-dimensional laser scanner. The invention further discloses a method of the in-tunnel surveying and lofting system based on the BIM and the point cloud model. The method comprises the following steps of A, constructing the point cloud model, B, outputting parameters, and C, surveying and lofting. By utilizing three-dimensional scanning, a point cloud model and a BIM model technology, the device is reasonable in structure and ingenious in design, the measurement lofting efficiency and measurement lofting precision are effectively improved