Application Of 3D Laser Scanning Technology In Slope Monitoring

High and steep slope monitoring plays a key role in preventing slope hazard.With the rapid development of monitoring technology,especiallyt the emergence of 3D laser scanning technology,it has been widely used in various fields.The high efficiency,high precision,non-contact and general view of 3D laser scanning technology has become era of the Surveying and mapping.Especially for slope monitoring,the 3D laser scanning technology can comprehensively reflect the changes of the entire surface,and play a good reference for the slope conteol and protection.Compaed with the traditional point monitoring method,it can better reflect the slope stability and the extent of change.In this paper,the high and steep slope of open-pit mine as the experiment site,using the overlength 3D laser scanning technology to analysis of the displacement of slope and proving the feasibility of overlong 3D laser scanning technology in monitoring of the high and steep slope.The main content of this paper is based on the I-site8820 overlong 3D laser scanner and introduces the research background and the current situation of the 3D laser scanning technology.In concluding of the principle,classification,characteristics and application fields of 3D laser scanning technology and introducing the data acquisition,point cloud conversion,I-site Studio 5 processing of I-site8820 3D laser scanner.The sources of point cloud errors in 3D laser scanning are analyzed;Contrast with TM30 Measure robot the angle and distance to correct it;The temperature on the point precision with roughness and color of the material on the intensity of influence is analyzed.The reflection intensity of different substances is different.The accuracy of the two point cloud matching methods is analyzed;For the point cloud data to extract to analyse different density point cloud for the influence of on the DEM.Conbined with several interpolation algorithm theory,analyzing the precision of the DEM.By analyzing the change of the three phase point cloud from the line,surface,body and so on;By comparing the monitoring data with TM30 monitoring robot,it is found that the slip direction of the slope is consistent,The surface reconstruction is carried out by matlab,and the comparison of two points cloud model,single point settlement and partial settlement are realized.The advantages and feasibility of adopting overlong 3D laser scanning technology are verified,for the slope disaster early warning to provide safety guarantee.