Visual monitoring method for deformation of open-air deep foundation pits in buildings based on drone photography and point cloud registration
The monitoring errors of displacement at the top of the foundation pit,surface settlement,and pipeline deformation are significant,which affect the construction quality of open-air deep foundation pits in buildings.In order to reduce the deformation monitoring error of open-air deep foundation pits in buildings,a visual monitoring method for the deformation of open-air deep foundation pits in buildings based on drone photography and point cloud registration was designed.The flight range and flight steps of the drones were planned,and the parameters for each flight were set,as well as the overlap rate of heading and sidetracking.As a result,the image data by drone photography was collected.A deformation monitoring model for open-air deep foundation pits was established,and a monitoring model process was designed.Deformation monitoring based on point cloud registration was achieved,and the error parameters and coordinate conversion relationship between two sets of points with the same name were calculated by using the monitoring model.The correction coordinates were thus obtained.Registration between point clouds was performed to achieve visual monitoring of deformation.The performance test of the designed monitoring method was conducted using engineering examples,and the results show that in the monitoring and testing of the displacement at the top of the foundation pit,surface settlement,and pipeline deformation of certain engineering,the designed monitoring method is closer to the actual situation,and the error is effectively reduced.
drone photographypoint cloud registrationopen-air deep foundation pitdeformation monitoring
国家科技期刊平台
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